Emerson Rosemount 702 Reference Manual page 76

Mounting, Wiring Switches, and Output Circuits:
Models 702DX32 and 702DX42
July 2017
Figure 7-10. Possible Configurations for Both Channel1 and Channel 2
Special considerations for dual output circuits
If both channels are connected to output circuits, it is very important that the CMN terminal of each
circuit be at the same voltage. Employing a common ground for both output circuits is one way to
ensure that both circuits have CMN terminals at the same voltage.
Figure 7-11. Dual Output Circuits with Common Ground
If two output circuits are connected to a single Rosemount 702 Transmitter with a single power supply,
both CH + and CMN terminals must be connected to each output circuit. The negative power supply
wires must be at the same voltage and connected to both CMN terminals.
66 Mounting, Wiring Switches, and Output Circuits: Models 702DX32 and 702DX42
Reference Manual
00809-0200-4702, Rev DA