About this task
The SBH automatically discovers BACnet MS/TP devices.
Note: Before you connect the controller to the system bus:
- Apply power to the field controller and configure a unique MS/TP device address to be unique on the trunk before you connect it to the SBH.
- Set the baud rate to 38400 and the ADPU to acceptable values. See Performance considerations.
To connect and integrate BACnet devices into the Verasys system, complete the following steps:
- Connect the BACnet devices to the same MS/TP network of the SBH through the System Bus port of the SBH.
Ensure to wire devices in a daisy-chain from one to the
Note: Home run wiring does not work.
Ensure sequential MS/TP MAC address of the devices as they move
along the wire. Start with address 4 as the device closest to the SBH.
Note: 0-3 are reserved.
- Ensure devices on the two ends of the network have the EoL switch set to improve network performance.
Use 22-3 AWG wire to connect +,-, and COM from controller to
controller. Leave the SHD terminal empty. Tie shield cabling together external
to the controller.
Figure 1. Connecting the SBH to your equipment
Figure 2. Daisy-chain wiring configuration
Table 1. Daisy-chain wiring configuration Callout Description 1 Terminating device on the system bus 2 System bus terminal block plugs 3 Daisy chained device on a system bus segment 4 To next device on the system bus segment