Allen-Bradley 1756 Series User Manual

Rockwell Automation Publication 1756-UM013B-EN-P - October 2019 47
1756-IB16S Input Module Features Chapter 3
Use Test Output with a
Safety Input
A test output can be used in combination with a safety input for short circuit and
cross-channel fault detection. In this case, Point Mode must be Safety Pulse Test.
Safety input pairs must be associated with different Test Output sources.
When pulse testing is used, the only test source available for each channel is the
test output to the left as shown on the wiring diagram.
Figure 6 - 1756-IB16S Module - Input Connected to Test Output
IMPORTANT
Because of the pre-configured relationships between test outputs and input channels, wiring a
dual channel device to input channels 0 and 8 is not supported if pulse testing is required, the
same holds true for 1/9, 2/10, 3/11, 4/12, 5/13, 6/14, 7/15.
TIP The test output also can be configured as a power supply to source 24V DC to
an external device, for example, a light curtain.
TO-1
TO-2
TO-3
TO-4
TO-5
TO-6
TO-7
IN-1
IN-2
IN-3
IN-4
IN-5
IN-6
IN-7
IN-8
IN-9
IN-10
IN-11
IN-12
IN-13
IN-14
IN-15
DC(+)
DC(+)
DC(-)
DC(-)
TO-0
TO-1
TO-2
TO-3
TO-4
TO-5
TO-6
TO-7
IN-0
TO-0
+
-
+
-
Channel Connections
The diagram shows devices that are connected to safety input
channel 0 and test output channel 0.
You can connect devices to all 16 channels.
2-wire sensor
3-wire sensor
24V DC
SELV/PELV-listed
power supply

Allen-Bradley 1756 Series Specifications

General

Brand	Allen-Bradley
Model	1756 Series
Category	Control Unit
Language	English