Liquiline CM442R/CM444R/CM448R
Electrical connection
Hauser
37
6.5.3
Bus termination
There are two ways to terminate the bus:
1.
Internal terminating resistor
(via DIP switch on the module board)
‣
Using a suitable tool, such as a tweezers, set all 4 DIP switches to the "ON" position.
The internal terminating resistor is used.
a0016306
Fig. 46: Structure of the internal terminating resistor
2.
External terminating resistor
Here, leave the DIP switches on the module board in the "OFF" position (factory setting).
‣
Connect the resistor to terminals 81 and 82 on the front of module 485 for 5-V power
supply.
The external terminating resistor is used.
Fig. 45: DIP switches for internal terminating resistor
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