SLC 500™ Analog I/O Modules 13
Publication 1746-IN008A-US-P
Wiring Considerations
The following section provides system wiring guidelines, how to ground your
Belden™ cable, and how to determine the cable length.
System Wiring Guidelines
Use the following guidelines in planning the system wiring for the analog
modules:
• all analog common terminals (ANL COM) are electrically connected inside
the module. ANL COM is not connected to earth ground inside the module.
• voltages on IN+ and IN- terminals must remain within ± 20 Volts with respect
to ANL COM to ensure proper input channel operation. This is true for current
and voltage input channel operation.
• voltage outputs (OUT 0 and OUT 1) of the NIO4V and NO4V are referenced
to ANL COM. Load resistance (R1) for a voltage output channel must be
greater than or equal to 1K ohms.
• current output channels (OUT 0 and OUT 1) of the NIO4I and NO4I source
current that returns to ANL COM. Load resistance (R1) for a current output
channel must remain between 0 and 500 ohms.
After the analog input module is properly installed in the chassis, follow the
wiring procedure below using Belden 8761 cable.
Before wiring any analog module, disconnect power from the
SLC 500 system and from any other source to the analog
module.
Care should be taken to avoid connecting a voltage source to a
channel configured for current input. Improper module
operation or damage to the voltage source can occur.
Allen-Bradley HMIs
To Next Page
Loading...
