Emerson 3AODO8 Field Installation Manual page 10

Emerson FB3000 RTU 8-Channel Output Module Field Installation Guide
D301917X012
October 2022
The figure, below, shows how to wire a digital output (DO_02) to drive an inductive load (such as a
relay coil).
Digital Output (DO) Wiring
1
2
3
Note
When using a digital output to drive an inductive load (such as a relay coil), place a suppression
diode across the load. This protects the DO from the reverse Electro-Motive Force (EMF) spike
generated when the inductive load is switched off. (See DO2 in the figure, above.)
8
Suppression Diode
Relay coil or inductive load
30V Power Supply (Max)