MODBUS INSTALLATION
Part. No. 2400M2501_6 Touchpoint Pro
55 Technical Handbook
6.10 Modbus Jumper Settings and Termination Resistor Fitting
To connect or change the termination resistor using the TPPR jumpers located on the Bus Interface Board:
1. Power off and isolate the mains supply and backup batteries.
2. Open the Controller enclosure to access the controller cover panel (see figure on next page).
3. Remove any USB devices and SD Cards.
4. Disconnect all conflicting cables.
5. Remove the two M4 locknut screws at the top and one at the bottom of the cover.
6. Carefully slide the cover off.
7. Locate the Bus Interface Board (BIB) on the right side of the Control Module motherboard).
8. Set the jumpers for the appropriate channel to the ‘Termination On’ position according to the diagram and table
below.
9. Carefully slide the cover back into place and refit / tighten the M4 locknuts.
10. Re-connect all cables.
11. Refit the SD Card and optional USB devices.
12. Switch on the batteries and Mains power.
13. Wait for the system to initialize and check/test that everything is working correctly.
Figure 69. Modbus BIB Jumper Default Settings
Note: Jumper pins 1 & 2 are ‘Resistance ON’ and pins 2 & 3 are ‘Resistance OFF’
6.11 Modbus Multi-Drop Mode
A maximum of 32 nodes (31 slave nodes plus one master node) can be supported for a multi-drop installation.
CAUTION – ELECTROSTATIC HAZARDS
All electronic and PCB assemblies contain static sensitive components. Take anti-static precautions to minimise the
risk of damaging components through electrostatic discharge.
The SD Card, any USB device and all conflicting cables must be removed before attempting to remove the Control
Module cover panel.
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