BACnet Transceiver Installation & Network Setup Sample Clauses

BACnet Transceiver Installation & Network Setup a. Transceiver Installation Choose a location close to the computer, network hub or RS485 loop. Mount the Transceiver on the wall using four #8 screws. 24 VAC Input (500 mA nominal) - Connect 24VAC 60 Hz (no secondary ground) to the input terminals using 20 AWG wire as shown in the product data sheet. TCP/IP Connection (J2) Connection (J1) Default IP Jumper 24 VAC Input Figure 1 Terminals MSTP (RS485) - Use 20 gauge shielded twisted pair wire to connect the Transceiver (Terminals A+ & B-) to the network (See Figure 1). Do not Terminate the shield wire in the terminal. Terminate the shield wire at the controller end only. Multiple RS485 Devices - If more than one RS485 device is used the devices should be “daisy chained” or “straight-line connected” by connecting all the “A” wires to the “A” terminals and the “B” wires to the “B” terminals. Do not use spur lines or a star configuration RS485 Terminating Resistor - If the MOD9200 is at the end of a RS485 loop a terminating resistor should be installed to match the electrical impedance characteristic of the twisted pair loop and prevent signal echoes from corrupting the data.
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