Spectrum Controls 1746sc-INI4vi - Manual (Page 22)

18 SLC 500 ™ Isolated Analog Input Modules
Figure 2. Wiring schematic for 2-, 3-, and 4-wire analog inputs
Important: Your module does not provide power for analog inputs. Use a power supply
that matches the transmitter specifications.
Module channel
In +
Common - Power +
Supply -
Transmitter
+ -
2-Wire Transmitter
Module channel
In +
Common - Power +
Supply -
4-Wire Transmitter
Module channel
In +
Common - Power +
Supply -
3-Wire Transmitter Transmitter
Supply Signal
GND
Transmitter
Supply Signal
+ +
- -
Figure 3. Wiring schematic for single-ended analog inputs
Important: With single-ended inputs, the channels are not isolated from each other.
Also, single-ended inputs are less immune to noise than differential inputs.
V in 0 +
I in 0 +
Common 0 -
Shield
Shield
V in 1 +
I in 1 +
Common 1 -
V in 2 +
I in 2 +
Common 2 -
Shield
Shield
V in 3 +
I in 3 +
Common 3 -
Power +
Supply -
Transmitter
+
Signal
Transmitter
+
Signal
Transmitter
+
Signal
Transmitter
Supply Signal
GND
Input Module