MODBUS INSTALLATION 
Part. No. 2400M2501_6    Touchpoint Pro 
  54  Technical Handbook 
6.9  Modbus Configuration Examples 
The Modbus interface consists of two independent Modbus ports. The RS485 connections are located on terminals TB6 and 
TB7 of the Control Module. For convenience, IN and OUT terminals are provided which are connected together internally. 
The diagrams on the next page show example configurations of which the second and third offer redundancy. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Figure 68.  Six Modbus Configuration Options 
 
Note: TPPR can fill any of the slave nodes but cannot have same slave IDs in daisy chain or multi-drop configuration. 
Note: if a different resistance is required, leave the Modbus Master 120 Ω Jumper pins un-shorted and connect the resistor 
directly between TB6 and / or TB7 terminals 3 and 4 (A OUT and B OUT). 
Modbus 
Master 
Modbus 
Master 
Modbus 
Master 
Modbus 
Modbus 
(120 Ω Jumper pins 
shorted) 
(120 Ω Jumper pins 
unshorted) 
Node 
Node 
Node 
Node 
Node 
Node 
Node 
Node 
Node 
Node