26 Rockwell Automation Publication 1734-UM013N-EN-P - September 2017
Chapter 2 Safety Inputs, Safety Outputs and Safety Data
POINT Guard I/O Analog Input Module
The following are the safe states of the POINT Guard I/O analog input module:
• Safety input data to network in single-channel configuration: 0 (OFF)
• Safety input data to network in dual-channel equivalent configuration:
– If a diagnostic fault occurs, the signal for the faulted channel is set to 0
(OFF).
– If a dual-channel discrepancy fault occurs, the dual-channel inputs
continue to report actual input signals.
Safety Inputs (1734-IB8S)
Safety inputs are used to monitor safety input devices.
Using a Test Output with a Safety Input
A test output can be used in combination with a safety input for short circuit,
cross-channel, and open-circuit fault detection. Configure the test output as a
pulse test source and associate it to a specific safety input.
Figure 4 - Example Use of a POINT Guard I/O Input Module
The test output can also be configured as a power supply to source 24V DC
to an external device, for example, a light curtain.
I0 I1 I4 I5
I2 I3 I6 I7
COM COM COM COM
TO T1M T2 T3M
0
2
4
6
1
3
5
7
0
2
4
6
1
3
5
7
Where:
T0 = Test Output 0 T1M = Test Output 1 with Muting
T2 = Test Output 2 T3M = Test Output 3 with Muting
I0…I7 = Safety Inputs
Safety Input
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