Connection of ground, shield und earthing

Due to the differential inputs of the terminals, different methods for connection of ground, shield und earthing are recommended depending on the type of thermocouple used.

For earthed thermocouples, ground is connected to the shield.
If the thermocouple has no earth connection, the ground, shield and -TC1 or -TC2 contacts are connected with each other.

Connection of ground, shield und earthing 1: — KL3312 - Connection of ground, shield und earthing (left: earthed thermocouple, right: non-earthed thermocouple)

The examples show the situation for KL3312. For the KL3314, the shield should be connected to an additional shield terminal (KL9195).