Multi-Drop Mode - Honeywell touchpoint Pro Operating Instructions Manual

MAN0923_Issue 3_04/15
14. Appendix 1 - Modbus Option
7. Set the jumpers for the appropriate channel to the "Termination On" position according to the diagram
and table below
8. Carefully replace the cover on the Control Module, refit and re-tighten the three locknut screws
9. Refit the cables
Note: The termination resistor should only be switched across a channel that forms the final node of an
RS485 highway. It is necessary to set both jumpers for the channel.
Channel 1 (TB5)
14.7 Jumpers for the Termination Resistance - default configuration
Setting
Termination ON
Termination OFF

14.2.6 Multi-drop mode

For a multi-drop installation, a maximum of 32 nodes (31 slave nodes plus one master node) can be
supported.
PL3
Termination Off
Termination On
PL4
Termination Off
Termination On
Channel 1
PL3 PL4
1-2 1-2
2-3 2-3
Termination On
Termination Off
Termination On
Termination Off
Channel 2 (TB6)
Channel 2
PL5
1-2
2-3
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Touchpoint Pro
Operating Instructions
PL6
PL5
PL6
1-2
2-3