WAGO-I/O-SYSTEM 750
Diagnostics 47
750-439 8DI NAMUR Ex i
Manual
Version 1.3.0, valid from HW Version 03, SW Version 03
8
Diagnostics
8.1
Diagnostics via LED Indicators
The display elements of the I/O modules provide information about possible
statuses and cases of error. The table below contains the evaluation of the
signaling:
Table 31: Signal Evaluation for Each Channel, LED A-H
LED Status
Possible interpretation
Make contact (NO)
Break contact (NC)
Off
Not ready for operation.
Contact open or NAMUR
sensor in
“blocking” status
(“0” per EN 60947-5-6)
Contact closed or NAMUR
sensor in
“conductive” status
(“1” per EN 60947-5-6)
Green
Contact closed or NAMUR
sensor in
“conductive” status
(“1” per EN 60947-5-6)
Contact open or NAMUR
sensor in
“blocking” status
(“0” per EN 60947-5-6)
Red
Short circuit
Red, flashing
Wire break