Led operation and diagnostic, Troubleshooting, Series circuit - 2 guards open – Rockwell Automation 440N SensaGuard Magnetically Coded NonContact Switch (MC2) User Manual
Page 6: Series circuit - open circuit on channel a

5. LED Operation and Diagnostic
Unit Indicators (per IEC 60073)
State
Status
Troubleshooting
Off
Not Powered
Check supply, check wiring to controller A
Device Output
Off
Overload
Check AUX connections
LED
Red
Actuator not present
If actuator present check misalignment.
Green
Actuator Present
NA
Green
Actuator Present
Check wiring to controller
flashing
Actuation not present on other
Check actuators on other switches
switches or wiring fault
6. Troubleshooting
72697 Issue 4 EO: 28485
6
Magnetically Coded Non Contact Switch Installation Instructions
Note: Refer to Technical Specifications for Certification information and ratings.
S11
S21
Safety A
Safety B
24V
Aux
Safety A
Safety B
24V
Aux
Safety A
Safety B
24V
Aux
Safety A
Safety B
24V
Aux
Safety A
Safety B
24V
Aux
S12
S22
LED - Flashing
Green
LED - Red
Aux - ON
LED - Red
Aux - ON
LED - Green
Aux - OFF
Aux - OFF
LED - Flashing
Green
Aux - OFF
Aux
Aux
Aux
Aux
Aux
6.1
Series Circuit - 2 Guards Open
S11
Open Circuit between two MC2s
S21
Safety A
Safety B
24V
Aux
Safety A
Safety B
24V
Aux
Safety A
Safety B
24V
Aux
Safety A
Safety B
24V
Aux
Safety A
Safety B
24V
Aux
S12
S22
LED - Flashing
Green
LED - Flashing
Green
Aux - OFF
LED - Green
Aux - OFF
LED - Green
Aux - OFF
Aux - OFF
LED - Flashing
Green
Aux - OFF
Aux
Aux
Aux
Aux
Aux
6.2
Series Circuit - Open circuit on channel A
The auxiliary contacts close at the same time as the first safety contact opens
The auxiliary contacts close at the same time as the first safety contact opens