GE MDS DS-SD2 Wireless Data Transceiver User Manual 4692A SD2 Quick Start FCC

GE MDS LLC Wireless Data Transceiver 4692A SD2 Quick Start FCC

User Manual

05-4692A01, Rev. 03 (FCC) MDS SD Series Quick Start Guide (x710 Mode) 1MDS SD2 TransceiverQuick Start Guide (x710 Mode)The MDS SD2 transceiver (Figure 1) is a software-configurable, industrial solution for use in wireless telemetry applications. The unit operates in the 216 to 222 MHz frequency band. The radio interfaces with a variety of data control equipment such as remote terminal units (RTUs), programmable logic controllers (PLCs), flow computers, and similar devices. Data interface con-nections may be made by both serial (RS-232/485) and limited Ethernet protocols.Invisible place holderFigure 1. MDS SD2 Data TransceiverThere are three main requirements for installing the transceiver:• Adequate and stable primary power• An efficient and properly installed antenna system• Correct interface connections between the transceiver and the data device.Figure 2 shows a typical installation of the radio.NOTE: Retrofit Kits are available to simplify installation at formerMDS x710 digital and analog sites. Consult the Refer-ence Manual for ordering details.2.1 Installation StepsIn most cases, the steps given here are sufficient to install the transceiver. Refer to the Reference Manual for additional details, as required.1. Mount the transceiver using the brackets supplied. Attach the brackets to the bottom of the transceiver case (if not already attached), using the four 6-32 x 1/4 inch (6 mm) screws supplied. Mounting bracket dimensions are shown in Figure 3. If DIN Rail mounting brackets are to be used, consult the Reference Manual.NOTE: To prevent moisture from entering the radio, do not mountthe case with the cable connectors pointing up. Also,dress all cables to prevent moisture from running alongthe cables and into the radio.CAUTION: Using screws longer than 1/4 inch (6 mm) to attach thebrackets to the radio may cause internal damage. Useonly the screws supplied.Figure 2. Typical Installation (Remote Site Shown)Figure 3. Mounting Bracket Dimensions2. Install the antenna and feedline. The antenna used with the radio must be designed to operate in the radio’s frequency band, and be mounted in a location providing a clear path to the associated station(s). At Remote sites, aim directional antennas toward the Master Station. Low loss coaxial feedline should be used and it should be kept as short as possible.3. Connect the data equipment. Connection may be made to the COM port using Serial protocols (RS-232/RS-485).• Connect your data equipment to the appropriate serial port on the front panel. (Typically, COM2 is used for connecting data equipment, and COM1 is used for management of the radio. Other arrangements are possible. Refer to the Refer-ence Manual for details.) In all cases, the radio is hardwired as a DCE device. A straight-thru cable may be used for most applications.4. Connect primary power. Input power must be 10.0 to 30 Vdc and capable of providing at least 2.5 Amperes. A power con-nector with screw-terminals is provided with the unit (see 1.0 INTRODUCTION2.0 INSTALLATIONANTENNACONNECTOR (TNC)SERIAL DATACONNECTORS (DB-9)DC INPUTPOWERLED INDICATORPANELETHERNETCONNECTOR (RJ-45)COM1 used for radio managementDC POWER SUPPLYNegative Ground OnlyTRANSCEIVERLOW-LOSS FEEDLINEANTENNA SYSTEMSERIALMaster Stations typically useomni-directional antennaTODATA TELEMETRYDEVICE7.25˝ (16.99 cm)2.75˝ (7 cm)
2 MDS SD Series Quick Start Guide (x710 Mode) 05-4692A01, Rev. 03 (FCC)Figure 4). Strip the wire leads to 6 mm (1/4 inch) and insert them into the wire ports. Be sure to observe proper polarity as shown below. Tighten the binding screws securely.Figure 4. DC Power ConnectorCAUTION:The unit is designed for use with negative-groundsystems only. The power supply should be equippedwith overload protection (NEC Class 2 rating), toprotect against a short circuit between its output termi-nals and the radio’s power connector.5. Set the radio’s configuration. Connect a PC to the radio’s COM1 port as shown in Figure 5. A straight-thru cable may be used for this connection.NOTE: Consult your System Administrator if you are unsure ofthe settings required for your network.Figure 5. Setup for PC Configuration2.1.1 Software ConfigurationThere are two methods for communicating with the radio for con-figuration and management: Serial (COM1 DB9 connector) and Telnet (ETHERNET RJ-45 connector). Both present identical functionality, but the method of access is different for each. The focus here is on Serial access, but Telnet may be used by following these additional points, which replace Steps 1 and 2 below:• For Telnet, connect to the radio with a PC that is on the same IP network as the transceiver. Launch a Telnet pro-gram, and connect to the radio using its programmed IP address. • The default IP address is 192.168.1.1. If you do not know the IP address of the radio, use the serial configuration steps below to view the address with the IPCONFIG command.1. With a PC connected to the COM1 serial port, launch a terminal program, such as HyperTerminal (included with most pre-Vista Windows®-based PCs) and set the following parameters: 8 bits, no parity, one stop bit (8N1), flow control disabled, VT100 emulation. The radio’s COM1 port automatically determines the connected baud rate (within the range of 1200–115200 bps).2. Press the key followed by a series of keypresses (1/2 second intervals) until the > prompt appears. The radio is now ready to accept commands.3. Set/verify the RX (receive) and TX (transmit) frequencies. To set the receive frequency, enter RX followed by the correct fre-quency in MHz (xxx.xxxxx). Press .To set the transmit frequency, enter TX followed by the correct frequency in MHz (xxx.xxxxx). Press .4. The factory default modem settings support operation for most systems. Other options are available using the proper soft-ware commands. The current setting may be viewed using the MODEM command. Use MODEM [xxxx] if changes are required, where xxxx represents the modem speed in bps.When finished with the steps above, review the other configu-ration options to determine if other settings are required for your system. Table 3 lists key software commands for the radio.2.2 Initial CheckoutIn-service operation of the transceiver is completely automatic. The only operator actions required are to apply DC power and observe the LEDS for proper indications. Table 1 summarizes the radio’s LED functions.2.2.1 LED FunctionsNOTE: LED labeling may vary on early units. LED position andfunctionality remains as described below.Figure 6. LED Status IndicatorsTable 1: Description of LED Status IndicatorsNOTE: The Ethernet connector also has two embedded LEDs. Aflashing green indicates Ethernet data activity, and ayellow indicates 100 Mbps operation has been achieved.2.2.2 Antenna SWR CheckBefore placing the unit in final operation, the antenna system’s standing wave ratio (SWR) should be checked using a wattmeter suited to the frequency of operation. High SWR (above 2:1) may indicate an antenna or feedline problem, and should be corrected.2.2.3 RSSI Check (for Remotes)Using the RSSI command (received signal strength indication), check for adequate signal strength. The radio must be receiving a signal from the associated Master Station (LINK LED on or blinking). In general, signal levels stronger than –80 dBm will pro-vide very reliable communication and allow for a degree of “fade margin.”Optimize the RSSI at Remotes by slowly adjusting the direction of the station antenna. Watch the RSSI indication for several seconds after making each adjustment so that the RSSI accurately reflects any change in the signal strength. With RSSI, the less negative the number, the stronger the incoming signal (i.e., -70 dBm is stronger than -80 dBm).All radios in the network must meet the following basic require-ments for proper operation. Check these items first when trouble-shooting a communication problem:• Adequate and stable primary power• Secure cable connections (RF, data and power)• A clear transmission path between Master and each RemotePC Running Terminal SessionTransceiverDB-9M to COM1 PortESCAPEENTERENTERENTERLED Name DescriptionPWR • Continuous—Power applied, no problems detected.• Rapid flash (5x-per-second)—Alarm indication.LAN • Flashing—Ethernet data activity is detected.• Off—Ethernet signals not detected, or excessive traffic is present at the port.DATA1/DATA2 These LEDs show data activity on the DB-9 serial payload port(s).LINK When lit, indicates that a communication link exists with the master station.3.0 TROUBLESHOOTING
05-4692A01, Rev. 03 (FCC) MDS SD2 Quick Start Guide (x710 Mode) 3• An efficient and properly aligned antenna system providing adequate received signal strength.• Proper programming of the transceiver’s parameters• The correct interface between the transceiver and the con-nected data equipment (correct cable wiring, proper data format, timing, etc.)3.1 LEDsThe radio’s LED indicator panel provides useful information when troubleshooting a system problem. Refer to Table 1 for LED infor-mation.3.2 Event CodesWhen an alarm condition exists, the transceiver creates a mes-sage that can be read on a connected PC by using the ALARM command. Consult the Reference Manual for details.3.2.1 Types of AlarmsMinor Alarms—report conditions that, under most circumstances will not prevent transceiver operation. This includes out-of-toler-ance conditions, baud rate mismatches, etc. The cause of these alarms should be investigated and corrected to prevent system failure.Major Alarms—report serious conditions that generally indicate a hardware failure, or other abnormal condition that will prevent (or seriously hamper) further operation of the transceiver. Major alarms may require factory repair. Contact your factory represen-tative for assistance.3.3 Built-In Spectrum AnalyzerA Spectrum Analyzer screen is available for viewing other radio signals near the SD’s operating frequencies. Access to the ana-lyzer is made with the Spectrum command. Optionally, you can specify a frequency at the prompt to view the surrounding spectrum of that frequency To do this, enter Spec-trum xxx.xx, where xxx.xx is the frequency in MHz.The display creates a received signal strength indication (RSSI) vs. frequency plot for the frequency and surrounding signals. Refer to the Reference Manual for more information.4.1 COM1 Connections for PC ControlThe COM1 DB-9 connector is used for PC management of the radio. A straight-through cable is required that connects Pin 2 (RXD), Pin 3 (TXD), and Pin 5 (Ground). (See Figure 7.)Figure 7. COM1 Wiring to Computer4.2 COM2 ConnectionsThe COM2 connector (Figure 8) is typically used to connect an external DTE telemetry device to the radio, supporting the RS-232 or RS-485 (balanced) format, depending on how the radio is con-figured. The radio supports data rates of 300, 1200, 2400, 4800, 9600, 19200, 38400, 57600, and 115200 bps (asynchronous data only).The COM2 connector mates with a standard DB-9 plug available from many electronics parts distributors. 4.2.1 Pin Descriptions—RS-232 ModeTable 2 provides pin descriptions for the connector when operating in RS-232 mode. For RS-422/485, refer to the Reference Manual.NOTE: The radio is hard-wired as a DCE device.Table 3 on the following page lists key software commands for the SD transceiver. Many commands can be used in two ways: 1. The basic command (shown first) may be entered alone to issue a query or execute a simple command.2. The basic command may be appended with additional argu-ments (shown in brackets, if applicable) to further define a set-ting. A complete list of commands and detailed descriptions is provided in the SD Reference Manual (under development for SD2).The radio equipment described in this guide emits radio frequency energy. Although the power level is low, the concentrated energy from a directional antenna may pose a health hazard. Do not allow people to come closer than 1.50 meters to the front of the antenna when the transmitter is oper-ating with a 7 dBd (9.15 dBi) gain antenna. Use of higher gain antennas means increasing the distance accordingly. This guide is intended for use by a professional installer.FCC Part 15 NoticeOperation of this device 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. Any unauthorized modification or changes to this device without the express approval of the manufacturer may void the user’s authority to operate this device. Furthermore, this device is intended to be used only when installed in accordance with the instructions outlined in this guide. Failure to comply with these instructions may void the user’s authority to operate this device. 4.0 COM1/COM2 REFERENCEFigure 8. COM2 Connector (DB-9F)As viewed from outside the radioRXDTXDGND235RXDTXDGND235><DB-9 FEMALE(COMPUTER)DB-9 MALE(RADIO SIDE)5961Table 2: COM2 Pin Descriptions—RS-232Pin No. Input/Output Pin Description1OUTDCD (Data Carrier Detect/Link)—A low indicates signal received.2OUTRXD (Received Data)—Supplies received data to the connected device.3INTXD (Transmitted Data)—Accepts TX data from the connected device.4INSleep Mode Input—Grounding this pin places the radio in a low power consumption mode.5--Signal Ground—Connects to ground (negative supply potential) on chassis.6OUTAlarm Output (DSR)—Behavior is user-configurable. Default behavior: An RS-232 high/space (+5.0 Vdc) on this pin indicates an alarm condition. An RS-232 low/mark (–5.0 Vdc) indicates normal operation.7INRTS (Request-to-Send)—Keys the transmitter.8OUTCTS (Clear-to-Send)—Goes “high” after the programmed CTS delay time has elapsed (DCE), or keys another connected radio when RF data arrives (CTS KEY).9 -- Reserved—User I/O for special applications.5.0 COMMAND OVERVIEWRF Exposure Notice
GE MDS, LLC175 Science ParkwayRochester, NY 14620MDS SD2 Transceiver (x710 Mode) General Business: +1 585 242-960005-4692A01, Rev. 03 (FCC) FAX: +1 585 242-9620November 2009 Web: www.gemds.comTable 3: Key Software CommandsCommand FunctionALARM Read current operating condition of the radio.BAUD [xxxxx abc] Set/display the data rate and control bits.BUFF [ON, OFF] Enables or disables the internal radio data buffer.CTS [0-255] Set/display the Clear-to-Send delay in seconds.DEV Display modem control deviation.DEVICE [DCE, CTS KEY] Set/display device mode.DKEY Dekey the radio (transmitter OFF). This is generally a radio test command.DUMP Display all programmable settings.HELP Shows available commands.KEY Key the radio (transmitter ON). This is generally used as a radio test command.MODEM [xxxx] Set the modem characteristics of the radio.PORT [RS232, RS485] Set/display COM2 data port interface settings.PTT [0-255] Set/display the Push-to-Talk delay in milliseconds.PWR [20-37] Set/display the transmit power setting.RSSI Display the Received Signal Strength Indication.RTU [ON/OFF/0-80] Re-enables or disables the radio’s internal RTU simulator and sets the RTU address.RX [xxx.xxxx] Set/display the receive frequency.RXLEVEL [-20 to 0] Set/display the receive audio input level.SCD [0-255] Set/display the Soft-Carrier Dekey delay in milliseconds.SHOW [DC, PWR] Display the DC voltages and transmit power level.SNR Signal-to-Noise Ratio, expressed in dBSPECTRUM [xxx.xx] Display the transceiver’s built-in spectrum analyzer, where xxx.xx denotes center frequency.STAT Display radio status and alarms.TEMP Display the internal temperature of the radio in degrees C.TOT [1-255, ON, OFF] Set/display the Time-out Timer delay in seconds.TX [xxx.xxxx] Set/display the transmit frequency.TXLEVEL [-20 to 0, AUTO] Set/display the transmit audio input level.UNIT [10000...65000] Set/display the transceiver’s unit address.

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