SECTION 3. INSTRUMENTATION INTALLATION3-10TABLE 3.3-1. Station ID Numbers andCorresponding Switch Settings**Station Switch SettingsID 1234 567890 0000 0000X1 1000 0000X2 0100 0000X3 1100 0000X4 0010 0000X5 1010 0000X6 0110 0000X7 1110 0000X8 0001 0000X9 1001 0000X10 0101 0000X11 1101 0000X12 0011 0000X*255 1111 1111X* Station ID 255 is reserved for phone-to-RFbase stations.** See Appendix A in the RadiotelemetryNetwork Applications Manual for a table ofswitch settings.3.3.5.2 RF232 RF Base Station1. Install the base station antenna accordingto the manufacturer's instructions.Connect the antenna cable to the antennaand route the cable to the RF232.2. With the power cord disconnected, removethe four screws that attach the RF232 lid.Remove the lid, and install the radiotransceiver as shown in Figure 3.3-8.Connect the red wire to the "12 V" terminal,and the black wire to the " " terminal insidethe RF232. Connect the multi-coloredribbon cable to the RF modem; make surethat the keyway is properly aligned.3. Connect the antenna cable to the antennaconnector on the radio. Reassemble theRF232 lid using the screws previouslyremoved.4. With the power switch "OFF", connect thepower cord to 110V AC. Connect theserial port to the computer's serial portusing an SC25PS cable for a 25-pin serialport, or a PN7026 cable for a 9-pin serialport. Toggle the power switch to "ON" tooperate the RF232.3.3.6 MD9 MULTIDROP INTERFACEThe MD9 Multidrop Interface enablescommunication with one or more dataloggersand the computer over a single 75 ohm coaxialcable. An MD9 network can be connecteddirectly to the computer, or can be connected toa telephone modem (refer to the MD9 Manual)and accessed remotely.Total coax length may be up to three miles.Since each MD9 attenuates the signal 0.2 db,the maximum length depends on the number ofMD9s in the network (refer to the MD9 manual).Coaxial cable and BNC connectors may beordered from CSI, or purchased locally (BeldenType 9100 RG59/U or equivalent). Call BeldenWire and Cable at (317) 983-5200 for the nameof a local distributor.Installation requirements depend on the type ofcable that is used, and how it is installed (directburial, conduit, etc.). In general, follow stateand local electrical codes.3.3.6.1 MD9 Multidrop Interface at theDataloggerMount the MD9 to the enclosure backplate asshown in Figure 3.3-8.