Omega ISA- BUS MULTI-FUNCTIONAL BOARD OME-A822PG Hardware Manual page 37

Figure 4
R is a shunt resistor. A 250Ω shunt resistor converts 4-20mA to 1-5Vdc.
Signal Shielding
The signal shielding is the same for the connections shown in Figure 1 to Figure 4
Use a single connection to frame ground (not A.GND or D.GND)
Vin
OME-A-822PGL/PGH Hardware Manual ---- 35
OME-A-822PGL/PGH
A.GND
D.GND
Frame Ground