Diagnosis; Diagnostic Information; Signal Output - Wenglor SD4RAS0 N89 Série Notice D'instructions

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8. Diagnosis

8.1. Diagnostic information

The safety switch indicates the operating condition and faults by means of three­color LED's located in the
lateral surfaces of the sensor.
green LED • Indicates that the safety switch is ready for operation. The supply voltage is on.
yellow LED • Signals the presence of an actuator within range.
• If the actuator is operating near the limit of the hysteresis range of the safety switch
• The flashing can be used to prematurely detect variations in the clearance between
• The sensor must be adjusted before the distance to the actuator increases and
red LED • An error is detected
LED indication (red)
1 flash pulse
2 flash pulses
3 flash pulses
4 flash pulses
5 flash pulses
Continuous red
Tab. 2: LED Diagnostic information

8.2. Signal output

• A signal output additionally indicates the operating condition (see Tab.3: Diagnostic information).
• These signals can be used in a downstream control.
• The short­circuit proof signal output can be used for central visualization or control functions, e.g. in a PLC.
Sensor function
I. Supply voltage
II. Actuated
Actuated
III.
in limit area
Error warning,
IV.
sensor actuated
V. Error
Teach in
VI.
actuator
VII. Protection time
Tab.3: Diagnostic information
36
the LED is flashing.
the sensor and the actuator (e.g. sagging of a safety guard).
before the safety outputs are disabled, thus stopping the machine.
LED's
green red yellow
On Off Off
Off Off On
Flashes
Off Off
(1 Hz)
Off Flashes Off
Off Flashes Off
Off On Flashes 0 V
Fla­
Off Off
shes
Error cause
Error output OSSD1
Error output OSSD2
Cross­wire OSSD1/OSSD2
Ambient temperature too high
Wrong or defective actuator
Internal error, with yellow blinking teach­in procedure
Signal Safety
output Outputs
OSSD1,
OSSD2
0 V 0 V
24 V 24 V
24 V
24 V
Pulsed
0 V 24 V
0 V 0 V
0 V
0 V 0 V
Note
Voltage on, no evaluation of the voltage
quality
The yellow LED always signals the
presence of an actuator within range
The sensor must be adjusted before the
distance to the actuator increases and
before the safety outputs are disabled,
thus stopping the machine
After 30 minutes if the error is not
rectified
see Tab. 2: LED Diagnostic information
Sensor in teach­in mode
10 minute pause after re­teaching
Diagnosis