Honeywell touchpoint Pro Operating Instructions Manual page 182

MAN0923_Issue 3_04/15
14. Appendix 1 - Modbus Option
Modbus Master
(normally 120 ohm
termination resistance
Slave
Node
Slave
R
T
Node
14.4 Example Systems - Touchpoint Pro can be any one of the slave nodes
Alternatively, if a different resistance is required for a specific installation, do not change the jumper settings
but connect a resistor directly between terminals 3 and 4 (A OUT and B OUT) of TB6 and / or TB7 without
using the internal termination resistor.
To connect the termination resistor using the Touchpoint Pro jumpers located on the Bus Interface Board:
Caution: The SD Card, any USB device and all cables must be removed before attempting to remove
the Control Module cover panel.
1. Locate the cover panel of the Control Module
2. Remove all cables
Slave
Node
Slave
Node
Modbus Master
Disconnect 120 ohm
termination resistance
Slave
Node
Slave
Node
Slave
Node
Slave
Node
Slave
Node
182
Touchpoint Pro
Operating Instructions
Slave
R
T
Node
Slave
R
Node T