Modbus and BACnet Communication (RS-485)
Figure 11 Modbus and BACnet DIP Switches and Screw Terminals
1 DIP switch for setting RS-485 termination (120 Ω resistor) ON/OFF
2 Screw terminals for RS-485 (Modbus/BACnet) communication
3 Screw terminals for power supply input wiring (15 … 35 VDC / 16 … 24 VAC)
4 DIP switches for setting the device MAC address: see Figure 12 (page 16)
5 DIP switches for setting the communication bitrate (4800 … 115200 bps) and parity (N/E)
6 DIP switch for selecting either Modbus RTU or BACnet MS/TP mode
7 LED indicators for RS-485 transmit/receive activity
Setting Device MAC Address with DIP Switches
Figure 12 MAC Address DIP Switch Example
DIP
switches 32,
8, and 1 set
to ON
The MAC address is
encoded in eight bit binary
form, with each numbered
switch representing a single
bit. This example shows
address 41 selected: DIP
switches 32, 8, and 1
(decimal: 41, binary:
00101001) are set to ON.
Modbus and BACnet MAC Address Ranges
The BACnet MS/TP MAC address range for the transmitter is 0 … 127 (master mode only).
16 M212264EN-B
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