NCR RSD Atlanta 7710GA2 Electronic Pricing Transmitter User Manual Chapter 4

NCR Corporation, RSD - Atlanta Electronic Pricing Transmitter Chapter 4

Chapter 4

Installing the Hardware InfrastructureInstalling the DecisioNet RF SystemThis chapter describes how to install the DecisioNet hardwareinfrastructure. The DecisioNet hardware includes the followingcomponents:• CBS(s)*• CBS Power Supply(s)*• SmarTalker and SmarTalker II tags• Transmit and Receive Antennas*• RS-232/RS-422 Converter• RS-232/RS-422/RS-485 cables** To be installed only by NCR customer service personnel or NCR-trained personnel.Refer to Chapter 10, “SmarTalker and Rail Installation,” and/orChapter 11, “SmarTalker II and Rail Installation,” for informationabout tag installation.Refer to Appendix A and Appendix B for ordering information.Refer to Chapter 5 for Windows NT, Chapter 6 for NCR UNIX, andChapter 7 for SCO UNIX EPL controller memory requirements.4
4-2 Installing the Hardware InfrastructureTwo types of DecisioNet System configurations are discussed in thischapter:• Type 1 (lab) – This configuration uses one CBS.• Type 2 (store) – This configuration uses multiple CBSs.Technician Supply ChecklistThe following table shows the tools and supplies an installation teammay need to install the DecisioNet RF infrastructure.Tool/Supply QuantityCable ties 100Chain, single jack #16 Installation dependentCane pole or firm, flexible rod, 6 foot(not required for Type 1 (lab) configuration) 1Lift truck 1
Installing the Hardware Infrastructure 4-3Key Points to Remember During Installation• Label all cables and document labeling for future reference.• Neatness makes servicing the system much easier.• Allow slack in cables, especially in receive antenna cables.• Test the system as it is being installed. Refer to Chapter 12,“Testing the System,” for information on testing.• Provide AC power that meets NCR requirements for the powersupplies.• It is highly recommended that the EPL infrastructure not beconnected to the site’s EPL controller until the infrastructure hasbeen completely installed and tested. For more information ontesting the infrastructure and site certification, see your NCRrepresentative and reference the following materials:• B005-0000-1138: DecisioNet Support Tools Reference Guide(document)• G370-1182-0000: EPL Implementation Package for Windows 95/NT(disk media containing the EPL RF Certification Package)• 497-0410343: Site Certification/Re-Certification Process Document(for documenting site configuration information for supportpurposes)• EPL software may be installed on a portable PC or laptop to testthe system before connecting it to the site’s EPL controller.
4-4 Installing the Hardware Infrastructure Cables Required for Installation The following sections describe the DecisioNet System cableconnections. General Layout Instructions The DecisioNet System general layout instructions are as follows:• The total cable length for the entire site must not exceed thefollowing. Communication Protocol Communication speed (bps) Cable Length m (ft.) RS-422 (RS-232/RS-422 Converter to CBS) 9,600 720 (2,362) RS-485 (CBS to CBS) 19,200 720 (2,362)* * The total cable length of any one CBS group that consists of onepower supply and up to five CBSs must not exceed 162 m (532 ft.).• Only NCR authorized communication cable may be used. Refer toAppendix B for detailed cable diagrams.• Communication cables must be secured tightly with suppliedlocking connectors to prevent cables from coming loose.• Up to 20 CBSs can be installed in one DecisioNet System. An RS-485 terminator must be installed on the last CBS in the line. Refer toAppendix B for a detailed diagram of the RS-485 terminator.• If the communication cable is routed through an elevator shaft, itmust be in a conduit and the conduit must be connected to thebuilding ground.• The minimum distance between a communication cable and afluorescent, neon, or incandescent light is 30 cm (12 in.).
Installing the Hardware Infrastructure 4-5• The minimum distances between a communication cable andelectrical equipment/associated power cables are as follows:Maximum RatedCircuit Power Unshielded PowerCables Shielded PowerCables1 kVA 30.5 cm (14 in.) 2.54 cm (1 in.)2 kVA 45.7 cm (18 in.) 5.08 cm (2 in.)5 kVA 60.9 cm (24 in.) 15.24 cm (6 in.)Over 5 kVA 152.4 cm (60 in.) 30.48 cm (12 in.)• Do not route communication cables outside the building.• All communication cable connections must be protected fromelectrical and mechanical deterioration. The deterioration ofcommunication cable connections due to corrosion or electrolysis,especially in a humid or corrosive atmosphere, may result inelectrical noise.
4-6 Installing the Hardware InfrastructureSystem Cable ConnectionThe following illustration shows an example Type 2 (store)configuration, its cable connections, and the cable numbers. Refer tothe table that follows for details about each cable.15947aISP Power Supply 1CBS 00123CBS 05123CBS 10123CBS 15123CBS 01123CBS 02123CBS 03123CBS 04123CBS 06123CBS 07123CBS 08123CBS 09123CBS 11123CBS 12123CBS 13123CBS 14123CBS 16123CBS 17123CBS 18123CBS 19123Power Supply 2 Power Supply 3 Power Supply 4C048C046C049C046C052C051C046C046C047C046C054 C054 C054C046C046C046C049C049C046C046C049C049C046C046C046C046C049C046C046C049C046C046C049C049C046C049C046C046C049C046C046C049C046C046C049C046C046C046C049C046C046C049C046C046C049C046C046C049C050C046 C046 C046C053**** ** ** **** ******** * *C052******* ** ** **************** ** ** **** ** ** *********** = optional extension cable** = CON 1 and CON 2 are interchangeableNote :RS232/RS422ConverterRS232PortRS232Cable C047 C047C046 **C046*C052*C052**** **C049*C049*C049*
Installing the Hardware Infrastructure 4-7Connector LocationThe CBS and power supply cable connectors are shown in thefollowing illustrations.Communications Base Station16134Note: Some CBSs may have minor cosmetic differences. Theindentations around the transmit antenna may be round (as shown) ormay be square. Also, there is only one physical connection for thetransmit antenna. The other connector location is a metal blank.Connector location depends on CBS type (7710-1000, 7710- 1001, or7710-1002). The connector is on the right, as shown in the illustrationabove, for the 7710-1001 and 7710-1002. The connector is on the left forthe 7710-1000.
4-8 Installing the Hardware InfrastructurePower Supply+ 60 VD C out AC in16133FrontBack
Installing the Hardware Infrastructure 4-9CablesNCR supplied cables conform to type CL2P, UL subject 13-PLCC NEC725-38(b) (3). Refer to Appendix B for detailed cable diagrams.Cable IDPart Number Description Lengthm (ft.) Connect From Connect To Comments1424-C051-0180230-0134924 RS-422 Cable 18.0(59.0) CBS CON-3 C053 Can beextended byadding a seriesof C052s1424-C048-0180230-0134940 RS-485/DCCable 18.0(59.0) First PowerSupply Primary CBSCON-1 Can beextended byaddingalternatingC049s andC046s to reachthe CBS.1424-C046-0180230-0134922 RS-485/DCCable 18.0(59.0) Any CBSCON-1 CBS CON-2 ofnext CBS Can beextended byalternatingC049s andC046s.1424-C047-9999230-0134923 RS-485 Cable(for separatingDC power)0.2(0.6) CBS CON-1 ofevery 5th CBS C046 from theprevious CBSCON-21424-C054-0180230-0134941 RS-422/DCCable 18.0(59.0) Second, thirdand fourthPower SupplyCBS CON-3 ofthe same CBSthat C047 justwent toCan beextended byadding a seriesof C052s1424-C050-9999230-0134942 RS-485Terminator CBS CON-2 oflast CBS in line
4-10 Installing the Hardware InfrastructureCable IDPart Number Description Lengthm (ft.) Connect From Connect To Comments1424-C053-9999230-0134946 RS-422 Adapter RS-232/RS-422Converter CBS CON-3 ofthe primary CBS Connectsthrough a C051and a series ofC052s1424-C049-9999230-0134944 RS-485/DCExtensionAdapter0.1(0.3) Extends C048sor C046s Add alternatingC049s andC046s to a C048when one C048does not reach.C048-C049-C046-C049-C046-C049-C046...Use a C049between C046swhen one C046does not reachC046-C049-C046-C049-C046-C049-C046...1424-C052-0180230-0134945 RS-422/DCExtension Cable 18.0(59.0) Extends C051sor C054s. Use one C051or C054 and aseries of C052swhen one C051or C054 doesnot reach.C051-C052-C052-C052-C052orC054-C052-C052-C052-C0521424-C056-0018230-0134971 TransmitAntenna Cable 1.8(5.9) TransmitAntennaConnector onCBSTransmitAntenna Reverse threadscrew onconnector(TNC)1424-C057-0180230-0134951 Receive AntennaCable 18.0(59.0) ReceiveAntennaConnector A, B,C, or D on CBSReceiveAntenna Quickdisconnectconnector(BNC)
Installing the Hardware Infrastructure 4-11The following illustrations show how cables can be extended to meetinstallation requirements.Extending a C048 cableC048 C049 C04618 meters 0.1 meters 18 metersrepeat as necessaryExtending a C054 cableC05218 meters 18 metersC054repeat as necessaryExtending a C046 cableC046 C049 C04618 meters 0.1 meters 18 metersrepeat as necessaryExtending a C051 cableC05218 meters 18 metersC051repeat as necessary 16000
4-12 Installing the Hardware InfrastructureInstalling Primary and Secondary CBSsThe following sections describe how to prepare a CBS for installationand how to install a CBS when preparation is complete.Installation ProcessInstall the CBSs at the same time you install the power cables, datacables, and antennas. The most efficient way to install the DecisioNethardware is in one pass through the store.Things to Remember• For a dropped ceiling, use a mounting system appropriate to theceiling type.• For an open ceiling, mount the CBSs to the roof trusses.• The CBS mounting system must isolate system ground from earthground. Use only NCR CBS Mounting Bracket 7710-K300-V001.To open the cover of the CBS, release the latches and pull the cover up.14067CoverLatchesOpen
Installing the Hardware Infrastructure 4-13Preparing the CBSThe CBS uses a four-position DIP switch and a ten-position rotaryswitch to control the following functions:• CBS Address• CBS Address Display• Normal or Diagnostic start-up• RS-422 SpeedThe following illustration shows the location of DIP switch DSW1 androtary switch DSW2.LED 4LED 3LED 2LED 1LED 6LED 7LED 5Rotary Switch (DSW2)Dip Switch (DSW1)The chassishandle is in this direction.14058Refer to Chapter 12, “Testing the System,” for information about teststhat utilize the LEDs.
4-14 Installing the Hardware InfrastructureDIP Switch SettingsThe following table shows the functions of DIP switch DSW1.Function Switch Setting DescriptionCBS Address (tens digit) 1 On 1Off 0RS-422 Speed 2 On 4,800 bpsOff 9,600 bps (required)Diagnostic Switch A 3 On Diagnostics start-up (Referto Chapter 12, “Testing theSystem,” for details.)Off Normal start-upDiagnostic Switch B 4 On CBS address indication(When Switch 3 is set fornormal start-up.)Off NormalRotary Switch SettingsThe following table shows the function of rotary switch DSW2.Function Position DescriptionCBS Address 0-9 Units digit value (decimal)
Installing the Hardware Infrastructure 4-15Setting the CBS AddressSet the address of each CBS before installing it in the ceiling. To set aCBS address, use DIP switch DSW1-Switch 1 for the high bit, androtary switch DSW2 for the low nibble as shown in the followingillustration where the example CBS address is 10.DSW1-Switch 1 set to On DSW2 set to position 010Set the CBS address to 0 -19 (decimal). Each CBS must have its ownunique address. The CBS addresses do not have to be sequential asthey are wired. There can be unused addresses in the series as long asthere are not twenty CBSs in the system.Communication SpeedSet the RS-422 communication speed to 9,600 bps by setting DSW1-Switch 2 to the OFF position. Set the communication speed beforeinstalling the CBS in the ceiling.
4-16 Installing the Hardware InfrastructureInstalling CBSsInstall the CBS in the ceiling using a mounting system appropriate forthe ceiling type. The illustration below is for open ceilings.Caution: DO NOT install CBSs by placing them on the ceiling tiles.CBS Mounting SystemR em ote R eceive A ntennaeCBDA16177N ote: xxxxxxxxxx xxx xxxxxxx x x xx xxx F ro n t V ie wC e ilin g J o is tU-boltsCBSSide V iewM ountingB racketCBSU -boltsTransm it A ntennaR em ote R eceive A ntennaeCBDAC e ilin g J o is tU-boltsCBS Back ViewS a fe ty S tra pS a fe ty S tra pS a fe ty S tra pC e ilin gJoistM ountingB racketM ountingB racketCaution: Provide clearance between the ceiling joist braces and CBSmounting bolts to isolate the CBS case from building ground.
Installing the Hardware Infrastructure 4-17Install the mounting bracket as follows:1. Slide the U-bolts around the ceiling joists, and then into the slots ofthe mounting bracket. Install the yokes, spacers if needed, andtighten the nuts.2. Lift the CBS up to the mounting system and hook the holes in theback of the CBS case onto the carriage bolt heads.Caution: To prevent damage of the transmitter, the transmit antennamust be connected to the CBS before power is applied to the CBS.
4-18 Installing the Hardware InfrastructureCable Connections for a Type 1 (Lab)ConfigurationThe following diagram shows the configuration of a Type 1 (lab)DecisioNet System.ISP Power SupplyCBS 1RS232/RS422ConverterC048C051RS232CableSingle CBS, Minimum CablingC050RS232Port123CO5315938
Installing the Hardware Infrastructure 4-19The following diagram shows the CBS connector locations.16134
4-20 Installing the Hardware InfrastructureConnecting an RS-232/RS-422 Converter to the Primary CBSThe RS-232/RS-422 Converter converts the communication protocolfrom RS-232 to RS-422. Install the converter near the power suppliesand host computer in the back office or computer room.To install the converter, do the following:1. Connect a standard RS-232 cable from the RS-232 port on the EPLController to the RS-232 port on the converter.2. Connect the RS-422 adapter cable (C053) to the RS-422 terminalblock (TB1) inside the converter as shown in the followingillustration. Refer to Appendix B for a detailed diagram of thecable.Black R(+)Yellow R(-)Red T(+)Blue T(-)TxA (TX+)TxB (TX-)RxA (RX+)RxB (RX-)161563. Connect an RS-422 cable (C051) to the C053 cable.4. Either connect the C051 cable to CON 3 of the CBS or add as manyC052 cables as are required to meet the desired length. Then plugthe last C052 cable into CON 3 of the CBS. Refer to the Single CBS,Minimum Cabling illustration in the previous section, “CableConnections for a Type 1 (Lab) Configuration.”
Installing the Hardware Infrastructure 4-21Converter Strapping InformationSet up the converter as follows:W15 Jumper W18 Jumper S2 XW1 DIPSwitch JumperUse thesesettings with a7710 system:B/C(Dataenabled)Don’t care ON(terminatedoutput)XW1A (DCE)Default settings(for referenceonly - DO NOTrely upon these):A/B(RTS/CDenabled)B/C(RTS enablesdriver)OFF(unterminatedoutput)XW1A (DCE)If you have problems making the PC to converter connection work,verify that all of your jumper settings are as shown above. If this doesnot work, try moving the XW1 DIP switch jumper from the XW1A(DCE) position to the XW1B (DTE) position. If that fixes the problem,then you have a null modem RS-232 cable instead of a standardmodem RS-232 cable. If the system works with the alternative XW1setting, then it is acceptable to use that setting.Connecting Power Supplies to AC PowerPlace the power supply with the host computer system if possible. Ifthis is not possible, you may place it nearer to the CBSs it is powering.1. Have an electrician install new AC receptacles if needed.2. Do not plug the power supply into the AC receptacle until steps 1 –3 in the next section are complete.
4-22 Installing the Hardware InfrastructureConnecting a Power Supply to a Primary CBSThe power supply provides DC power to the CBS. To connect thepower supply to the CBS do the following:1. Remove the rear plate as shown in the following diagram. Insertthe rectangular plug of an RS-485/DC cable (Cable CO48) into theDC plug located at the back panel of the power supply, and thenreinstall the rear plate at the back panel of the power supply. Insertthe AC power cable into the AC receptacle located on the backpanel of the power supply.DC PlugRear PlateAC Plug161322. Either connect C048 into CON 1 of the CBS or add as many C049 -C046 cables as are required to meet the desired length. Then plugthe last C046 cable into CON 1 of the CBS. Refer to the system cableconnection illustrations in the previous sections, “CableConnections for a Type 1 (Lab) Configuration” and “CablesRequired for Installation.”3. Connect the AC plug to the AC power source.Caution: To prevent damage of the transmitter, the transmit antennamust be connected to the CBS before power is applied to the CBS.
Installing the Hardware Infrastructure 4-23Cable Connections for a Type 2 (Store)ConfigurationThe following diagram shows a typical configuration for a Type 2(store) DecisioNet System. This configuration can be scaled down asneeded for a smaller store or lab environment. Remember that onepower supply can support up to five CBSs.15947aISP Power Supply 1CBS 00123CBS 05123CBS 10123CBS 15123CBS 01123CBS 02123CBS 03123CBS 04123CBS 06123CBS 07123CBS 08123CBS 09123CBS 11123CBS 12123CBS 13123CBS 14123CBS 16123CBS 17123CBS 18123CBS 19123Power Supply 2 Power Supply 3 Power Supply 4C048C046C049C046C052C051C046C046C047C046C054 C054 C054C046C046C046C049C049C046C046C049C049C046C046C046C046C049C046C046C049C046C046C049C049C046C049C046C046C049C046C046C049C046C046C049C046C046C046C049C046C046C049C046C046C049C046C046C049C050C046 C046 C046C053**** ** ** **** ******** * *C052******* ** ** **************** ** ** **** ** ** *********** = optional extension cable** = CON 1 and CON 2 are interchangeableNote :RS232/RS422ConverterRS232PortRS232Cable C047 C047C046 **C046*C052*C052**** **C049*C049*C049*
4-24 Installing the Hardware InfrastructureThe following diagram shows the CBS connector locations.16134
Installing the Hardware Infrastructure 4-25Connecting an RS-232/RS-422 Converter to the Primary CBSThe RS-232/RS-422 Converter converts the communication protocolfrom RS-232 to RS-422. Install the converter near the power suppliesand host computer in the back office or computer room.To install the converter do the following:1. Connect a standard RS-232 cable from the RS-232 port on the EPLController to the RS-232 port on the converter.2. Connect the RS-422 Adapter cable (C053) to the RS-422 terminalblock (TB1) inside the converter as shown in the followingillustration. Refer to Appendix B for a detailed diagram of thecable.Black R(+)Yellow R(-)Red T(+)Blue T(-)TxA (TX+)TxB (TX-)RxA (RX+)RxB (RX-)161563. Connect an RS-422 cable (C051) to the C053 cable.4. Either connect the C051 cable to CON 3 of the CBS or add as manyC052 cables as are required to meet the desired length. Then plugthe last C052 cable into CON 3 of the CBS.Note: Refer to “Cable Connections for a Type 1 (Lab) Configuration”in this chapter for converter strapping information.
4-26 Installing the Hardware InfrastructureConnecting Power Supplies to AC PowerPlace the power supplies in the back office with the host computersystem if possible. If this is not possible, they can be placed nearer tothe CBSs they are powering. You may stack the power supplies.1. Have an electrician install new AC receptacles if needed.2. Do not plug the power supplies into the AC receptacles until steps1 – 3 in the next section are complete.Connecting a Power Supply to a Primary CBSThe power supply provides DC power to the CBS. To connect thepower supply to the CBS do the following:1. Remove the rear plate as shown in the following diagram. Insertthe rectangular plug of a RS-485/DC cable (Cable CO48) into theDC plug located at the back panel of the power supply, and thenreinstall the rear plate at the back panel of the power supply. Insertthe AC power cable into the AC receptacle located on the backpanel of the power supply.DC PlugRear PlateAC Plug16132
Installing the Hardware Infrastructure 4-272. Either connect C048 into CON 1 of the CBS or add as many C049 -C046 cables as are required to meet the desired length. Then plugthe last C046 cable into CON 1 of the CBS.
4-28 Installing the Hardware Infrastructure3. Connect the AC plug to the AC power source.Caution: To prevent damage of the transmitter, the transmit antennamust be connected to the CBS before power is applied to the CBS.Connecting a Power Supply to a Secondary CBSTo connect the power supply to the 6th (CBS 05), 11th (CBS 10), or 16th(CBS 15) secondary CBS, perform the following procedure:1. Remove the rear plate as shown in the diagram on the previouspage. Insert the rectangular plug of an RS-422/DC cable (C054) intothe DC receptacle located at the back panel of the power supply,and then reinstall the rear plate at the back panel of the powersupply. Connect the AC power cable to the AC connector.2. Either connect the cable C054 into CON 3 of the CBS or add asmany C052 cables as are required to meet the desired length. Thenplug the last C052 cable into CON 3 of the CBS.3. Connect the AC plug to the AC power source.Caution: To prevent damage of the transmitter, the transmit antennamust be connected to the CBS before power is applied to the CBS.Connecting RS-485 Cables between Secondary CBSsThe RS-485 cables connect the data (and sometimes the power)between the secondary CBSs. The secondary non-powered CBSs areconnected differently from the powered CBSs. This section tells how toconnect the non-powered CBSs. (On the cable diagram this is called a485 series.) The next section tells how to connect the powered CBSs.1. Connect an RS-485/DC cable (C046) to the RS-485 connector(CON 2) of the current CBS.
Installing the Hardware Infrastructure 4-292. Either connect cable C046 to CON 1 of the next CBS or add as manyC049 - C046 combination cables as are required to meet the desiredlength. Then connect the last C046 cable into CON 1 of the nextCBS.3. Repeat steps 1 and 2 to connect all remaining (secondary) non-powered CBSs.Connecting RS-485 Cables between a non-powered(Secondary) CBS and a powered CBSTo install the RS-485 cables between a non-powered (5th (CSB 04), 10th(CBS 09), or 15th (CBS 14)) secondary CBS and a powered CBS (6th(CBS 05), 11th (CBS 10), or 16th (CBS 15)), perform the followingprocedure:1. Connect an RS-485/DC cable (C046) to the RS-485 connector(CON 2) of the non-powered (secondary) CBS.2. If the cable is at the desired length, go to step 3. If not, add as manyC049 - C046 combination cables as are required to meet the desiredlength to reach the next CBS.3. End the cable string with a DC-blocking RS-485 cable (C047) intoCON 1 of the powered CBS. This cable breaks the power line in theRS-485 line so that this CBS only receives power from one powersupply.
4-30 Installing the Hardware InfrastructureInstalling CBS AntennasThree types of CBS antennas are available:• Transmit• Receive• Patch (an optional receive antenna)The transmit and receive antennas look very similar. They are the samesize (a ground plane 0.3 m (12in.) in diameter and a dome6.35 cm (2.5 in.) high), but have the following differences:• The transmit antenna does not have a hole in the dome and it has aleft-hand thread, screw-on TNC connector.• The receive antenna has a small hole in the dome and it has a quickdisconnect BNC connector.13185
Installing the Hardware Infrastructure 4-31The patch antenna is small, has its own mounting bracket, and isintended for use in a confined space such as a cooler or freezer wherethe large receive antenna may not fit.16127Installing Transmit and Receive AntennasInstall the antennas when installing the CBSs.Materials Needed• Transmit antennas• Receive antennas• Mounting hardware appropriate for the ceiling typeThings to Remember• For a dropped ceiling, mount the antennas on the ceiling tiles.• For an open ceiling, hang the antennas from the roof trusses.
4-32 Installing the Hardware InfrastructureInstalling an Antenna on a Ceiling TileTo install an antenna on a ceiling tile, drill a 76 mm (3.0 in.) hole in thetile. Place the tile back in the ceiling and from above the tile, place thedome of the antenna into the hole. Use cable ties to secure the antennacables.Note: If the ceiling tile has an aluminum backing, remove a 0.61 m(2 ft.) diameter section of foil from around the hole, or remove all ofthe foil, whichever is easier.Maintain a minimum distance of 9.2 m (30 ft.) between a transmitantenna and any receive antennas connected to the same CBS.A minimum of9.2 m (30 ft)of separationis required.CBSTransmitAntennaReceiveAntennaCeiling Tile Ceiling Tile60 Ft. Cable6 Ft. Cable16136Note: Some CBSs may have minor cosmetic differences. Theindentations around the transmit antenna may be round (as shown) ormay be square. Also, there is only one physical connection for thetransmit antenna. The other connector location is a metal blank. Wherethe connector is located depends on the type of CBS (7710-1000, 7710-1001, or 7710-1002). The connector is on the right, as shown in theillustration above, for the 7710-1001 and 7710-1002. The connector is onthe left for the 7710-1000.
Installing the Hardware Infrastructure 4-33Installing an Antenna on a Roof TrussIn a location where there is no dropped ceiling, use wires or chains tohang the antenna from a roof truss as shown in the followingillustrations. Do not let the antenna hang by its antenna cable.AB13188
4-34 Installing the Hardware InfrastructureInstalling a Patch Antenna16127The patch antenna has an attached mounting bracket with two sets ofholes. It can be mounted to walls, ceilings, or other brackets. Due to themany installation possibilities, screws are not included with theantenna.Use sheet metal screws to mount the antenna to metal walls or ceilings,such as those found inside of freezers. Use other types of screws asapplicable to the mounting situation. Be careful not to over tighten thescrews and damage the mounting bracket.Consider the following when installing patch antennas:• The patch antenna can be used throughout the store like the largerreceive antenna, but due to its small size, it is more useful inconfined areas. When mounting the antenna, face the front of theantenna (the side opposite the cable connector) towards the tags,with as few obstructions between it and the tags as possible.
Installing the Hardware Infrastructure 4-35• In a freezer, the best position is for the antenna to face down theaisle, between the shelves where the tags are and the freezer door.Place the antenna back behind the first door opening, where storeitems will not fall on it and it is out of the customer’s view.• Use a standard 18.29 m (60 ft.) receive cable (1424-C056-0180) toconnect the CBS and the patch antenna. When running the cablewithin a freezer or cooler area, locate the cable on the back wall orceiling away from the doors or customer access areas. Near thepatch antenna, secure the cable with cable ties to provide strainrelief for the connector and antenna bracket.

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