Specifications

Analog Input Modules
31007715 6/2008 45
The analog returns (pin 4) for each channel are internally connected—therefore
there is no channel-to-channel isolation.
Sample
Wiring Diagrams
The following field wiring example shows how two single-ended analog sensors can
be wired to the STB AVI 1255 module. An external power supply is required to
power the single-ended sensors:
3 inputs from sensor 1 (top) and sensor 2 (bottom)
4 returns from input 1 (top) and input 2 (bottom)
2 no connection no connection
3 input from sensor 1 input from sensor 2
4 analog input return analog input return
5 no connection no connection
6 field power return (to the module) field power return (to the module)
Pin Top Connections Bottom Connections
3
4
3
4
U
+
-
U
+
-
-
+
FE
FE
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