Honeywell Enraf VITO 762 Installation Manual page 26

Electrical installation
Caution
With RTD's, first connect one of the common wires of each RTD to
GND-REF0 / GND-REF1 / GND-REF2.
Figure 15 Three separated RTD's connected to 762 VITO-MRT
Note:
Non used RTD's elements connections should be left open.
Installation guide 762 VITO interfaces & VITO probes Page 26