Rockwell Automation 1746-XXXX SLC 500 4-Channel Analog I/O Modules User Manual - Manual (Page 58)

Publication 1746-UM005B-EN-P - June 2004
5-4 Testing Your Module
Testing Analog Inputs
Before testing the analog module input channels, the SLC 500 system
must be installed and tested according to the SLC 500 Fixed Hardware
Style Installation & Operation Manual (publication 1747-6.21) or the
SLC 500 Modular Hardware Style User Manual (publication
1747-UM011). The processor must be connected to a programming
device, properly configured, and must have no rungs in its ladder
program. The analog module LED must also be illuminated.
The devices connected to the analog module input channels are
referred to as “sensors.” If the sensors can be manually varied over
their normal operating range, use these devices to test the analog
module input channels.
If the sensors cannot be manually varied, a voltage source or current
source is necessary to test the input channels. In this case, disconnect
the analog module input channels at the sensor to test the terminal
block wiring. The following information applies to either test
procedure.
ATTENTION
The procedure described in this section for testing
analog module input channels assumes that all I/O
module outputs that normally activate prime movers
or other potentially dangerous devices have been
disconnected from these devices.
Do not attempt to test the analog module input
channels unless prime movers and/or other
potentially dangerous devices are disconnected from
the I/O modules.
IMPORTANT
The following procedure does not ensure that the
input mode DIP switch is properly configured.
Visually inspect the input mode DIP switch before
installing the analog module in the chassis.
ATTENTION
Care should be taken to avoid connecting a voltage
source to a channel configured for a current input.
Improper module operation or damage to the
module can occur.