Invensys Rail 80319 Gate Tip Tx User Manual August 2005

Invensys Rail Corporation Gate Tip Tx August 2005

Users Manual

$50.00 PRINTED IN U.S.A. USER'S GUIDE RF SENSOR SYSTEM JULY 2008 DOCUMENT NO. COM-00-08-XX VERSION A Safetran Systems Corporation, California Division 10655 7th Street, Cucamonga, California 91730 1-800-793-SAFE Copyright © 2008 Safetran Systems Corporation, All rights reserved
ii PROPRIETARY INFORMATION SAFETRAN SYSTEMS CORPORATION has a proprietary interest in the information contained herein and, in some instances, has patent rights in the systems and components described. It is requested that you distribute this information only to those responsible people within your organization who have an official interest. This document, or the information disclosed herein, shall not be reproduced or transferred to other documents or used or disclosed for manufacturing or for any other purpose except as specifically authorized in writing by SAFETRAN SYSTEMS CORPORATION. WARRANTY INFORMATION SAFETRAN SYSTEMS CORPORATION warranty policy is as stated in the current Terms and Conditions of Sale document. Warranty adjustments will not be allowed for products or components which have been subjected to abuse, alteration, improper handling or installation, or which have not been operated in accordance with Seller's instructions. Alteration or removal of any serial number or identification mark voids the warranty. SALES AND SERVICE LOCATIONS Technical assistance and sales information on SAFETRAN products may be obtained at the following locations: SAFETRAN SYSTEMS CORPORATION SAFETRAN SYSTEMS CORPORATION 2400 NELSON MILLER PARKWAY CALIFORNIA DIVISION LOUISVILLE, KENTUCKY 40223 10655 7th STREET TELEPHONE: (502) 618-8800 CUCAMONGA, CALIFORNIA 91730 FAX: (502) 618-8810 TELEPHONE: (909) 532-5300 SALES & SERVICE: (800) 626-2710 CUSTOMER SERVICE: (800) 793-7233 WEB SITE: http://www.safetran.com TECHNICAL SUPPORT: (800) 793-7233 FAX: (909) 532-5400 FCC RULES COMPLIANCE This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. WARNING TO USERS The user that changes, or modifications not expressly approved by the part responsible for compliance could void the user’s authority to operate the equipment.
iii NOTES, CAUTIONS, AND WARNINGS Throughout this manual, notes, cautions, and warnings are frequently used to direct the reader’s attention to specific information. Use of the three terms is defined as follows: NOTE Generally used to highlight certain information relating to the topic under discussion. CAUTION REFERS TO PROPER PROCEDURES OR PRACTICES WHICH IF NOT STRICTLY OBSERVED, COULD RESULT IN A POTENTIALLY HAZARDOUS SITUATION AND/OR POSSIBLE DAMAGE TO EQUIPMENT. CAUTIONS TAKE PRECEDENCE OVER NOTES AND ALL OTHER INFORMATION, EXCEPT WARNINGS. WARNING INDICATES A POTENTIALLY HAZARDOUS SITUATION WHICH, IF NOT AVOIDED, COULD RESULT IN DEATH OR SERIOUS INJURY. WARN-INGS ALWAYS TAKE PRECEDENCE OVER NOTES, CAUTIONS, AND ALL OTHER INFORMATION. If there are any questions, contact Safetran Application Engineering.
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TABLE OF CONTENTS Section Title Page PROPRIETARY INFORMATION .................................................................................................... II WARRANTY INFORMATION ........................................................................................................ II SALES AND SERVICE LOCATIONS .............................................................................................. II NOTES, CAUTIONS, AND WARNINGS ..................................................................................... III TABLE OF CONTENTS.................................................................................................................... V 1.0 INTRODUCTION ........................................................................... 1-1 1.1 SCOPE .............................................................................................................................................1-11.2 DEFINITIONS AND ACRONYMS ..............................................................................................1-11.3 SYSTEM COMPONENTS .............................................................................................................1-21.4 THEORY OF OPERATION ...........................................................................................................1-31.5 SYSTEM DESCRIPTION................................................................................................................1-41.6 SPECIFICATIONS...........................................................................................................................1-51.7 ORDERING INFORMATION.......................................................................................................1-62.0 INSTALLATION.............................................................................. 2-1 2.1 GTT INSTALLATION ....................................................................................................................2-12.2 RFSB INSTALLATION...................................................................................................................2-32.2.1 RFSB Interconnect ........................................................................................................2-43.0 SET UP............................................................................................. 3-1 3.1 RFSS SYSTEM SET UP..................................................................................................................3-13.2 DISCOVERY PROCESS .................................................................................................................3-13.3 RFSB SET UP..................................................................................................................................3-23.3.1 MOD Switch ...................................................................................................................3-23.3.2 LONG/SHORT SWITCH ................................................................................................3-33.3.3 GATE UP REFERENCE ...................................................................................................3-34.0 OPERATION ................................................................................... 4-1 4.1 RFSS SYSTEM OPERATION ........................................................................................................4-14.2 RF SENSOR BASE OPERATION .................................................................................................4-14.2.1 RFSB Indicators and Controls....................................................................................4-14.2.1.1 POWER INDICATOR.....................................................................................................4-14.2.1.2 HEALTH INDICATOR....................................................................................................4-2v Document No.: COM-00-08-XX Version: A
TABLE OF CONTENTS Section Title Page 4.2.1.3 COM (DISCOVERY) INDICATOR.................................................................................4-24.2.1.4 GATE UP INDICATOR ..................................................................................................4-24.2.1.5 GATE DOWN INDICATOR ...........................................................................................4-24.2.1.6 SYNC PUSHBUTTON ..................................................................................................4-24.2.1.7 MOD SWITCH ............................................................................................................4-24.2.1.8 LONG/SHORT SWITCH ............................................................................................4-24.2.2 GTT Indicator and Control.........................................................................................4-34.2.2.1 LED INDICATOR..........................................................................................................4-34.2.2.2 GTT PUSHBUTTON .....................................................................................................4-34.2.3 Gate Arm Position Entry and Exit Range................................................................4-35.0 TROUBLESHOOTING ................................................................... 5-1 5.1 RFSS SYSTEM TROUBLESHOOTING........................................................................................5-15.2 OPERATIONAL CHECKS .............................................................................................................5-15.2.1 RFSB CHECKS .................................................................................................................5-25.2.2 GTT CHECKS ...................................................................................................................5-2 LIST OF FIGURES Number Title Page Figure 1-1 Gate Tip Transmitter (GTT) ............................................................................................................1-2 Figure 1-2 RF Sensor Base ...................................................................................................................................1-2 Figure 1-3 System Block Diagram .....................................................................................................................1-3 Figure 1-4 GTT Indicator and Control..............................................................................................................1-4 Figure 1-5 RFSB Indicators and Controls ........................................................................................................1-4 Figure 2-1 Mounting GTT ....................................................................................................................................2-1 Figure 2-2 80319-02 GTT and RECO Light Harness......................................................................................2-2 Figure 2-3 GTT installation with RECO Light..................................................................................................2-2 Figure 2-4 Typical GTT Installation on Gate Arm .........................................................................................2-3 Figure 2-5 Mounting RFSB Component...........................................................................................................2-3 Figure 2-6 RFSB Interconnect ...........................................................................................................................2-4 Figure 3-1 Discovery Process..............................................................................................................................3-1 Figure 3-2 RFSB Set Up ........................................................................................................................................3-2 Figure 3-3 Gate Up Reference............................................................................................................................3-3 Figure 4-1 RFSB Indicators ..................................................................................................................................4-1 vi Document No.: COM-00-08-XX Version: A
LIST OF FIGURES Number Title Page Figure 4-2 GTT Indicator and Control..............................................................................................................4-3 Figure 5-1 RFSB Indicators ..................................................................................................................................5-1 Figure 5-2 GTT Indicators ....................................................................................................................................5-2 LIST OF TABLES Number Title Page Table 4-1 Gate Arm Position Entry and Exit Windows...................................................................................4-4 Table 4-2 Gate Arm Position Entry and Exit Windows ................................................................................4-4 Table 5-1 TROUBLESHOOTING CHART.............................................................................................................5-3 vii Document No.: COM-00-08-XX Version: A
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INTRODUCTION SECTION I INTRODUCTION 1.0 INTRODUCTION 1.1 SCOPE This manual describes the installation and operation of the Safetran RF Sensor System consisting of an RF Sensor Base (RFSB) and a Gate Tip Transmitter (GTT). 1.2 DEFINITIONS AND ACRONYMS RF Sensor System (RFSS) – General term for a base and sensor combination. For this specification, the sensor is the GTT and the base (RFSB) monitors the gate arm position and reports “down” and “up” events to the MTSS RF Sensor Base (RFSB) – A device that receives the sensor information transmissions and may determine events and report to a monitoring system. Gate Tip Transmitter (GTT) – A device that attaches near the end of a crossing gate arm and transmits position information. This tip sensor uses a low power RF radio to communicate with a base device. Industrial, Scientific and Medical Band (ISM) – Radio frequencies available for use by unlicensed devices governed by Part 18 of the FCC rules. The RFSS uses a low power radio communicating on several frequencies in the 902-928 MHz band. Safetran Mini Trackside Sensor (MTSS) – A device for collecting various sensor data and reporting to a centralized device. Up/Vertical/Clear – Position of a Gate Arm that allows traffic to cross a railway. Due to overhead clearance, many gate arms are not vertical when they are stopped and locked in their raised position. The “Up” condition is indicated when the gate arm is within 10º of the established reference position. Down/Horizontal/Level – Position of a Gate Arm that prevents traffic from crossing a railway. The “Down” condition is indicated when the gate arm is within 3º of the established reference position. Beacon – A signal that is broadcast for synchronization or notification. For the RFSS, the RF Sensor Base broadcasts a beacon packet to indicate the start of a communication period on a frequency. The beacon also contains a list of the successive frequencies that the RFSB will use. Discovery – Procedure used by a base and a tip to uniquely distinguish each other and exchange configuration information. After a successful Discovery, the base and tip will remain “paired” until the next Discovery. 1-1 Document No.: SIG-00-08-XX Version: A
INTRODUCTION 1.3 SYSTEM COMPONENTS The RFSS has two components: the GTT, as shown in Figure 1-1, which gathers and transmits gate arm position information Figure 1-1 Gate Tip Transmitter (GTT) The RFSB, as shown in Figure 1-2, which receives and analyzes the position information and provides the output signals to the recording equipment. Figure 1-2 RF Sensor Base Both components use PC-boards which have a microcontroller and radio; in addition, the GTT has an accelerometer. 1-2 Document No.: SIG-00-08-XX Version :A
INTRODUCTION 1.4 THEORY OF OPERATION The RFSS uses an RF Sensor Base (RFSB) and a Gate Tip Transmitter (GTT) to sense the position of the grade crossing barrier arm and provide event signals to reporting equipment (MTSS). Figure 1-3 System Block Diagram The GTT continually senses orientation and movement of the gate arm using an accelerometer and transmits the 3-axis acceleration values to the RFSB using a low power radio. The RFSB receives the radio packets from the GTT, analyzes the data and sets the output signals to indicate the position of the gate arm. The RF Sensor System interface to the reporting equipment (MTSS) is provided by the RF Sensor Base. The Gate Tip Transmitter communicates with the RFSB; but has no direct interface to the MTSS. For compatibility with the existing 80282 Gate Tip Sensor, the RFSB provides a 96 KHz signal to the MTSS to indicate Gate-Down. In addition to the current 96 KHz signal, the RFSB provides independent Gate-Down and Gate-Up position indications (both LED and digital output) and allows switching the 96 KHz carrier to be presented on either Gate-Down or Gate-Up condition. Note that the digital signals are independent; Gate Down and Gate Up are asserted or de-asserted independently. Since the position of the gate arm is actually down, up or somewhere in between, the indications are Down-asserted, Up-asserted or both de-asserted. While Down and Up are exclusive events, they are not opposites. The System devices (RFSB and GTT) rely on a local power source, but they do not require signal wiring or use the power wiring for signaling. The devices use low power radios for wireless communication. 1-3 Document No.: SIG-00-08-XX Version: A
INTRODUCTION 1.5 SYSTEM DESCRIPTION The GTT has a single Green/Red LED that is illuminated on request to indicate Health (Green) or Discovery (Red). There is a single pushbutton to request LED illumination or a Discovery sequence. The GTT is in an exposed location (on the gate arm), so the LED is normally off to avoid drawing attention to the device. Figure 1-4 GTT Indicator and Control The RFSB has LEDs to indicate POWER, HEALTH, DOWN position, UP position and COM (Discovery); these LEDs are illuminated whenever appropriate. The RFSB has a SYNC pushbutton that is used to request Remote LED illumination, establish Gate-Up reference, or Discovery sequence. The RFSB has two configuration switches: LONG/SHORT for different length gate arms and MOD to activate the 96 KHz carrier signal (Gate-Down or Gate-Up). Figure 1-5 RFSB Indicators and Controls 1-4 Document No.: SIG-00-08-XX Version :A
INTRODUCTION 1.6 SPECIFICATIONS Gate Tip Transceiver Input Voltage 9.0 – 20.0 VAC - VDC (13.2 V Nominal) Any Polarity Input Current 0.2A @ Nominal Voltage Environmental: Temperature: -40 F - +160 F (-40 C - +71 C) Humidity: Hermetically Sealed Dimensions: Length: 3.0 inches (7.6 cm) Width: 1.5 inches (3.8 cm) Depth: 1.625 inches (4.1 cm) Weight:: 2 ounces (56.7 g) FCC ID: LTY80319 IC: 2347A-80319 FCC CFR Part 15.247 and 15.109 Class B compliant Frequency Range: 902 MHz – 928 MHz ISM Band Number of Channels: 10 Channel Separation: 325 KHz RF Output Power: +10 dBm Modulation: FSK, OOK, MSK, GFSK Differential Load Impedance: 86.5 + j43 Ω FSK Data Rate: 500 kbps Maximum RSSI Output: Digital Receiver Sensitivity (FSK): -94 dBm Spurious Emissions: -57 dBm Antenna Connection Differential RF Sensor Base Input Voltage 8.0 – 34.5 VDC (13.2 V Nominal) Input Current 0.2A @ Nominal Voltage Environmental: Temperature: -40 F - +160 F (-40 C - +71 C) Humidity: 95% non-condensing Dimensions: Length: 3.50 inches (8.9 cm) Width: 6.00 inches (15.2 cm) Depth: 1.15 inches (2.9 cm) Weight:: 1.25 lbs (567 g) FCC ID: LTY80319 IC: 2347A-80319 1-5 Document No.: SIG-00-08-XX Version: A
INTRODUCTION FCC CFR Part 15.247 and 15.109 Class B compliant Frequency Range: 902 MHz – 928 MHz ISM Band Number of Channels: 10 Channel Separation: 325 KHz RF Output Power: +10 dBm Modulation: FSK, OOK, MSK, GFSK Differential Load Impedance: 86.5 + j43 Ω FSK Data Rate: 500 kbps Maximum RSSI Output: Digital Receiver Sensitivity (FSK): -111 dBm Spurious Emissions: -57 dBm Antenna Connection: RP - SMA Antenna: ½ Wave Center-fed Dipole Frequencies Used: 903.4 – 903.6 MHz 905.8 – 906.0 MHz 908.2 – 908.4 MHz 910.6 – 910.8 MHz 913.0 – 913.2 MHz 915.4 – 915.6 MHz 917.8 – 918.0 MHz 920.2 – 920.4 MHz 922.6 – 922.8 MHz 925.0 – 925.2 MHz 1.7 ORDERING INFORMATION CONFIGURATION CHART 8000-80314-00XX GATE TIP TRANSMITTER ASSEMBLY MOUNTING PLATE 1 = 80319-01 (ITEM 2) 2 = 80319-02 (ITEM 3) W/RECO 0 = NONE 1 = 074035-8-1 (ITEM 4) S-60 2 = 074038-8 (ITEM 5) S-40 1-6 Document No.: SIG-00-08-XX Version :A
INSTALLATION SECTION II INSTALLATION 2.0 INSTALLATION 2.1 GTT INSTALLATION The GTT installs in the lamp assembly on the gate arm. Wires are attached in parallel to existing Tip Light power wires using wire nuts. The GTT is mounted inside the cover of the Tip Light junction box using two #10 self tapping sheet metal screws included with the unit. The GTT should be mounted as near to the end of the gate as possible. The long surface is parallel to the edge of the gate arm. Figure 2-1 Mounting GTT 2-1 Document No.: SIG-00-08-XX Version:A
INSTALLATION Crossing gates using the Reco Tip Lights will require the use of the 80319-02 GTT shown in Figure 2-1, which includes a cable and plug. Figure 2-2 80319-02 GTT and RECO Light Harness The GTT RECO Light Harness connects to the Exit Connector on the Tip Light. as shown in Figure 2-3. TOPTOP PIN IN LAMP HOUSING CONNECTORMUST BE ALIGNED WITH THE WORD "TOP"MARKED ON GATE-TIP SENSOR CABLE PLUGTIP LIGHTEXIT CONNECTOR ONTIP LIGHTFRONT VIEW(SHOWS MISSING TOPCONTACT)(TOP TERMINAL DOES NOT HAVE A METALCONTACT INSERTED INTO THE MOLDEDCONNECTOR) Figure 2-3 GTT installation with RECO Light 2-2 Document No.: SIG-00-08-XX Version:A
INSTALLATION The GTT is mounted on the tip of the gate arm using the two #10 self tapping screws included with the GTT. A typical installation is shown in Figure 2-4. Gate Tip Transmitter Figure 2-4 Typical GTT Installation on Gate Arm 2.2 RFSB INSTALLATION The RFSB module installs inside the crossing gear box. A mounting plate is provided to mount the RFSB inside the gear box compartment as shown in Figure 2-5. Arrange the swivel antenna away from any gears or moving parts. Figure 2-5 Mounting RFSB Component 2-3 Document No.: SIG-00-08-XX Version:A
INSTALLATION 2.2.1 RFSB Interconnect The output of the RFSB is connected to the MTSS as shown in Figure 2-6. The RFSB and the MTSS must be connected to the same power source. To Battery To Battery To SEA/R II To Bell Figure 2-6 RFSB Interconnect 2-4 Document No.: SIG-00-08-XX Version:A
SET UP PROCEDURE SECTION III SET UP PROCEDURE 3.0 SET UP 3.1 RFSS SYSTEM SET UP The RF Sensor System set up procedure a simple operation. The procedure requires the crossing be powered up and the crossing gate in the down position. The appropriate measures will be required to secure vehicular traffic as well as pedestrian and worker safety. WARNING SET UP OF THE RF SENSOR SYSTEM REQUIRES THE CROSSING BE POWERED AND THE GATE IN THE DOWN POSITION. DELOY THE APPRORIATE RAILROAD SAFETY PROCEDURES TO SECURE VEHICULAR TRAFFIC AS WELL AS PEDESTRIAN AND WORKER SAFETY. 3.2 DISCOVERY PROCESS It is necessary to pair a GTT and RFSB together using the Discovery Process. Only one GTT and RFSB can be powered during the Discovery Process. PushbuttonAt least 4 secondsCom (Discovery) - REDPower - GREEN Discovery LED(RED) Pushbutton At least 4 seconds Figure 3-1 Discovery Process 3-1 Document No.: SIG-00-08-XX Version :A
OPERATION Perform the following procedure to pair the GTT and RFSB: 1.) Verify power is applied to the RFSB and the Power LED is illuminated. 2.) Verify Crossing Gate is powered and gate lamp power is on. 3.) Lower Crossing Gate 4.) Press Pushbutton of GTT for one second and verify LED is illuminated GREEN. 5.) Press GTT Pushbutton and hold for at least 4 seconds and verify LED is RED. 6.) Press RFSB Pushbutton and verify COM (Discovery) LED is illuminated solid. 7.) The GTT LED and RFSB COM LED will be lit during the Discovery Process. 8.) When GTT and RFSB LEDs extinguish the Discovery Process is complete. 3.3 RFSB SET UP The RFSB has two slide switch adjustments to configure the unit to the crossing gate as shown in Figure 3-2. MOD SWITCH Left – Gate Up Right – Gate Down LONG/SHORT SWITCH Left – Short Right - Long Figure 3-2 RFSB Set Up 3.3.1 MOD Switch The MOD switch on the RFSB selects the gate arm position that will activate the 96 KHz carrier. With the switch set to the left (towards the silkscreen) the output is set for activation in the gate arm up position. With the switch to the right (away from the silkscreen) the activation will be when the gate arm is down. For compatibility to the 80282 Gate Tip Sensor, the switch should be set to provide carrier when the gate arm is down. 3-2 Document No.: SIG-00-08-XX Version: A
SET UP PROCEDURE 3.3.2 LONG/SHORT SWITCH The Long/Short Switch on the RFSB configures the Gate Arm length. Short Gates are less than 25 feet in length. Long Gates are 25 feet or longer in length. Set the switch to the left for Short gate arms and to the right for Long gate arms. 3.3.3 GATE UP REFERENCE To establish a “Gate UP” reference in the RFSB, perform the following procedure: NOTE To perform the “Gate Up” reference procedure, power must be applied to the GTT with the Gate Arm in the “Up” position. 1.) With the Gate Arm Up and power applied to the GTT, press the SYNC pushbutton on the RFSB three (3) times. 2.) Verify the RFSB COM LED is illuminated. 3.) When the RFSB COM LED extinguishes, the reference procedure is completed. 4.) Restore normal signal operation. Push SYNC Button 3 Figure 3-3 Gate Up Reference 3-3 Document No.: SIG-00-08-XX Version :A
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OPERATION SECTION IV OPERATION 4.0 OPERATION 4.1 RFSS SYSTEM OPERATION The RF Sensor System operation is relatively transparent, once the set up procedure is complete. The RFSS components have indicators to provide system status. The GTT LED will illuminate on demand but remains extinguished during normal operation to not attract unwanted attention. 4.2 RF SENSOR BASE OPERATION The RF Sensor Base (RFSB) senses the Gate Arm position from the Gate Tip Transmitter (GTT). The RFSB is wired to the Mini Trackside Sensor (MTSS), which collects the data and sends it to a recorder life the Safetran SEA/R II. 4.2.1 RFSB Indicators and Controls The RFSB has several indicators to provide status and operational health as shown in Figure 4-1. Gate Up LONG/SHORT SWITCH Left – Short Right - Long MOD SWITCH Left – Gate Up Right – Gate Down Gate Down Health 1 Hz = Good 4 Hz = Bad Power LED On COM (Discovery) SYNC Pushbutton Figure 4-1 RFSB Indicators 4.2.1.1 Power Indicator The Power indicator LED (Green) illuminates when power is applied to the RFSB. 4-1 Document No.: SIG-00-08-XX Version :A
OPERATION 4.2.1.2 Health Indicator The Health indicator (Amber) is illuminated when power is applied to the RFSB and provides the Health status of the module. A 1 Hz flash rate indicates Good health. A 4 Hz flash rate indicates Bad Health and the module requires service. 4.2.1.3 COM (Discovery) Indicator The COM indicator (Red) illuminates during the Discovery operation while establishing a link with the GTT. The COM indicator also illuminates during the Gate Up Reference operation as the RFSB communicates with the GTT and records the Gate Up information. 4.2.1.4 Gate Up Indicator The Gate Up Indicator (Red) illuminates when the crossing gate arm is in the up position. In most installations, the GTT will be powered from the tip light power and only active while the gate lamps are on. Once the gate is in the up position and the power to the lamps and the GTT is removed, the Gate Up LED will extinguish until the GTT is repowered and the gate becomes active. Supplying continuous power to the GTT will provide an indication at all times. 4.2.1.5 Gate Down Indicator The Gate Down indicator (Red) illuminates when the gate arm is in the down position. 4.2.1.6 SYNC Pushbutton The SYNC Pushbutton has three modes. Each mode uses a different sequence to initiate the function. 4.2.1.6.1 SYNC Pushbutton Discovery Mode Pressing the SYNC pushbutton for 4 seconds or longer will start the Discovery Process. The Discovery process pairs the RFSB with a GTT as detailed in the Set Up Section. 4.2.1.6.2 SYNC Pushbutton Gate Up Reference Mode Pressing the SYNC pushbutton 3 times with the crossing gate arm in the Up position, will establish the Gate Up Reference for the RFSB. This reference is sent from the GTT to the RFSB and stored as the Gate Up position. 4.2.1.6.3 SYNC Pushbutton GTT Health Mode Pressing the SYNC pushbutton 1 time activates the GTT LED in the Health monitor mode for one minute. 4.2.1.7 MOD Switch The MOD Switch sets the gate position that will activate the 96 KHz carrier. Left towards the silkscreen is Gate Up, and Right away from the silkscreen is Gate Down. 4.2.1.8 LONG/SHORT Switch The LONG/SHORT Switch is used set the system for Long (25 ft or longer) or Short (24 ft or less) crossing gate arms. 4-2 Document No.: SIG-00-08-XX Version: A
OPERATION 4.2.2 GTT Indicator and Control The GTT has an dual color (RED/GREEN) LED and a Pushbutton Control. The indicator will illuminate during set up processes and when manually activated. The LED will extinguish when the process is complete or one minute after manual activation. The LED is normally off to remain stealth on the crossing gate arm. 4.2.2.1 LED Indicator The LED indicator illuminates Green to indicate module health. Flashing of 1 Hz indicates good health and 4Hz bad health. A Red indication will occur during the Discovery Process while the GTT is being paired with a RFSB. 4.2.2.2 GTT Pushbutton The GTT pushbutton is used to activate the Discovery Process and the GTT Health status. Pressing the GTT Pushbutton for 4 seconds will start the Discovery Process with a RFSB. The pushbutton on the RFSB also mush be pressed for 4 seconds. Pressing the GTT Pushbutton for 1 second will start the GTT Health monitor for 1 minute. Health/Discovery LED LED Illumination Request Pushbutton Figure 4-2 GTT Indicator and Control 4.2.3 Gate Arm Position Entry and Exit Range The GTT has an entry and exit window in both the Gate Up and Gate Down position. Table 1 details the window parameters for Gate Up and Gate Down positions for Short and Long Gate Arms. 4-3 Document No.: SIG-00-08-XX Version :A
OPERATION Table 4-1 Gate Arm Position Entry and Exit Windows Switch SHORT LONG Down-Entry (GT DN On) 5º 3º Down-Exit (GT DOWN Off) 8º 4º Up-Exit (GT UP Off) 8º 4º Up-Entry (GT UP On) 5º 3º Table 4-2 Gate Arm Position Entry and Exit Windows 4-4 Document No.: SIG-00-08-XX Version: A
TROUBLESHOOTING SECTION V TROUBLESHOOTING 5.0 TROUBLESHOOTING 5.1 RFSS SYSTEM TROUBLESHOOTING The RF Sensor System operation is relatively transparent. However, should a problem occur, the following troubleshooting procedures will aid in identifying the source of the problem. WARNING SERVICING THE RF SENSOR SYSTEM REQUIRES THE CROSSING BE POWERED AND THE GATE IN THE DOWN POSITION. DELOY THE APPRORIATE RAILROAD SAFETY PROCEDURES TO SECURE VEHICULAR TRAFFIC AS WELL AS PEDESTRIAN AND WORKER SAFETY. 5.2 OPERATIONAL CHECKS Simple checks can be made to verify the system operation. Reviewing the indicator LEDs will provide the system’s operational status. Gate Up Health 1 Hz = Good 4 Hz = Bad Power LED On Figure 5-1 RFSB Indicators 5-1 Document No.: SIG-00-08-XX Version :A
TROUBLESHOOTING 5.2.1 RFSB CHECKS Perform the following checks on the RFSB module: 1.) Verify the POWER LED is illuminated. 2.) Check the HEALTH LED. 1 Hz = GOOD, 4 Hz = Bad 3.) Check the GT UP (Gate Up) LED is illuminated (assuming the gate arm is up). 4.) Verify all wiring is properly terminated and secure. 5.) Verify the MOD and LONG/SHORT switches are in their proper positions. 6.) Verify antenna is securely mounted. 5.2.2 GTT CHECKS Perform the following checks on the GTT module: HEALTH 1 Hz = Good 4 Hz = Bad Figure 5-2 GTT Indicators 1.) Press the SYNC pushbutton on the RFSB module once and check the LED indicator on the GTT module. A 1 Hz flash rate indicates GOOD health a 4 Hz flash rate indicates bad health. 2.) If the LED is NOT flashing, press the pushbutton on the GTT once. If the LED is flashing verify is the flash rate is 1 Hz indicating GOOD health or 4 Hz BAD health. 3.) If no indication is observed on the GTT LED, verify power is available to the GTT module. 4.) If GTT LED did NOT illuminate after pressing the RFSB pushbutton and DID illuminate after pressing the GTT pushbutton, perform the Discovery Procedure and verify the GTT and RFSB are communicating as a pair. 5-2 Document No.: SIG-00-08-XX Version: A
TROUBLESHOOTING Table 5-1 TROUBLESHOOTING CHART GTT TROUBLESHOOTING LED Indicator will not illuminate Verify power is available. Verify power is within specification, 9 – 20 VAC or VDC Verify power wires are not cut or broken Replace GTT Module LED Indicates BAD Health Replace GTT Module LED will not illuminate when RFSB module pushbutton is pressed once Perform Discovery Procedure Verify RFSB module is operational RFSB TROUBLESHOOTING Power LED not illuminated Verify power is available Verify power is within specification, 9 – 20 VAC or VDC Verify power wires are not cut or broken Replace RFSB Module Health LED indicates BAD Health Replace RFSB Module RFSB Module will not communicate with GTT Module Verify GTT Module is operational Perform Discovery Procedure Verify antenna is securely fastened RFSB not communicating with MTSS Verify RFSB is in good health Verify Cage Clamp connector is secure Verify wiring is properly terminated and secure RF Sensor System Troubleshooting Gate Up LED not illuminated when Gate Arm is Up Perform Gate Up Reference Procedure Verify GTT is mounted properly Verify MOD Switch is set for proper Gate Length Verify GTT is good health 5-3 Document No.: SIG-00-08-XX Version :A
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