Communications wiring
RTU Open v5
CARRIER CORPORATION ©2019
Integration Guide
All rights reserved
9
NOTES
The controller recognizes physical changes (DIP switches, rotary switches, and jumpers) upon power up.
If RX LED is solid, then the terminations are incorrect.
If the network has greater than 32 devices or exceeds 2,000 feet, a Repeater should be installed.
If a controller begins or ends a network segment, a terminating resistor may be needed.
BACnet ARC156
To set up the RTU Open for BACnet ARC156
The RTU Open’s latest supported function codes and capabilities are listed on the associated Protocol
Implementation Conformance Statement (PICS),
Carrier BACnet PICS website
http://www.bacnetinternational.net/catalog/index.php?m=28
1
Turn
off
the RTU Open's power.
NOTE
Changes made to the switches when the controller is on will not take effect until the power is cycled!
2
Using the rotary switches
MSB
(
SW1
) and
LSB
(
SW2
), set a unique BACnet MS/TP MAC address for the RTU
Open. Set the
MSB
(
SW1
) switch to the tens digit of the address, and set the
LSB
(
SW2
) switch to the ones
digit. Valid addresses are 01-99.
NOTE
The rotary switches also determine the BACnet device instance of the controller on the BACnet
network. The BACnet device instance is automatically generated based on the scheme 16101xx, where “16”
is the BACnet vendor ID for Carrier Corporation, and xx equals the rotary switch address.
EXAMPLE
To set the controller’s MAC address to 01, point the arrow on the
MSB
(
SW1
) switch to 0 and the
arrow on the
LSB
(
SW2
) switch to 1. Internally, the BACnet device instance is automatically generated as
1610101.
10's
1's
1
3
45
2
7
8
9
6
0
1
3
45
2
7
8
9
6
0
SW1
SW2
M SB
LSB
3
Set the remaining DIP switches as follows:
BACnet ARC156 DIP switch settings
8
7
6
5
4
3
Off
Off
Off
Off
N/A
N/A
