Allen-Bradley 1791ES-IB8XOBV4 - Page 71

Rockwell Automation Publication 1791ES-UM001G-EN-P - November 2016 71
Wiring Examples Chapter 4
Figure 27 - Limit Switch Dual-channel Inputs and a Manual Reset
This example shows wiring and controller configuration when using the Guard
I/O module with limit switch dual-channel inputs and a manual reset. If used
in combination with the programs of a safety controller, the wiring is Category
4 in accordance with ISO 13849-1:2008 wiring requirements.
1
5
2
3
1
5
2
3
4
4
4
3
2
1
E1
S2
(N.O.)
S1
(N.C.)
S3
In + In -
FE I0 I1 T0 T1 I2 I3 T2 T3M
S2
(N.O.)
S1
(N.C.)
PS1
S3
PS1: User 24V DC Power Supply
S1: Safety Limit Switch
(positive opening mechanism)
S2: Safety Limited Switch
S3: Reset Switch
Close
Safety
Guard
Close
Safety
Guard
1791ES Modules
1732ES Modules
1 - Test Output 1
2 - Input 1
3 - Input Common
4 - Input 0
5 - Test Output 0
1 - Output Power
2 - Input Power
3 - Input Common
4 - Output Common
1 - Test Output 3
2 - Input 3
3 - Input Common
4 - Input 2
5 - Test Output 2
Controller Configuration Parameter Name Configuration Setting
Safety Input 0 Safety Input 0 Channel Mode Test Pulse from Test Output
Safety Input 0 Test Source Test Output 0
Dual-channel Safety Input 0/1 Mode Dual-channel Equivalent
Dual-channel Safety Input 0/1 Discrepancy Time 1000 ms (application dependent)
Safety Input 1 Safety Input 1 Channel Mode Test Pulse from Test Output
Safety Input 1 Test Source Test Output 1
Safety Input 2 Safety Input 2 Channel Mode Used as Standard Input
Safety Input 2 Test Source Not Used
Dual-channel Safety Input 2/3 Mode Single Channel
Test Output 0 Test Output 0 Mode Pulse Test Output
Test Output 1 Test Output 1 Mode Pulse Test Output
Test Output 2 Test Output 2 Mode Power Supply Output