MAN0923_Issue 3_04/15
Touchpoint Pro
Operating Instructions
184
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.
PL3
PL4
Channel 1 (TB5)
Channel 2 (TB6)
PL6
PL5
Termination Off
Termination Off
Termination Off
Termination Off
Termination On
Termination On
Termination On
Termination On
14.7 Jumpers for the Termination Resistance - default configuration
Setting
Channel 1
Channel 2
PL3
PL4
PL5
PL6
Termination ON
1-2
1-2
1-2
1-2
Termination OFF
2-3
2-3
2-3
2-3
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.
14. Appendix 1 - Modbus Option