Installation
10 RTU Open
1 Turn off the RTU Open's power. The controller reads the address each time you apply power to it.
2 Using the rotary switches, set the MSB (SW1) (10's) switch to the tens digit of the address, and set the
LSB (SW2) (1's) switch to the ones digit.
EXAMPLE To set the RTU Open’s address to 01, point the arrow on the MSB (SW1) switch to 0 and the
arrow on the
LSB (SW2) switch to 1.
3 Turn on the RTU Open's power.
NOTE The factory default setting is "00" and must be changed to successfully install your RTU Open.
To set the RTU Open's communications protocol and baud rate
RTU Open's SW3 DIP switches are used to set the controller's protocol and baud rate. The protocol and speed
selection is determined by the network on which the controller will be installed. For Carrier BACnet
implementations, select MS/TP @ 76.8 k as follows:
1 Power down the RTU Open. The controller reads the protocol and baud rate each time you apply power to
it.
2 Set SW3 DIP switches 1, 2, and 4 to On to configure the controller for BACnet MS/TP and 76.8 k baud.
3 Power up the RTU Open.
NOTE Other protocols and baud rates are available. See the RTU Open Integration Guide for additional
instructions.
Wiring the RTU Open to the MS/TP network
The RTU Open communicates using BACnet on an MS/TP network segment communications at 9600 bps,
19.2 kbps, 38.4 kbps, or 76.8 kbps.
Wire the controllers on an MS/TP network segment in a daisy-chain configuration.
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