7
SRB-E-212ST / SRB-E-322ST
Operating instructions
Safety-monitoring module
EN
7. Wiring examples
7.1 Possible applications
All applications for 1 or 2-channel safe evaluation for protective
equipment as follows:
• Safety door monitoring to ISO 14119
• Position switches with positive break to IEC 60947-5-1
• Safety sensors to IEC 60947-5-3
• Emergency stop command devices to ISO 13850 and EN 60947-5-5
• Magnetic safety sensors to IEC 60947-5-3
• Safety light curtain and photoelectric barriers according to IEC 61496
The connection of magnetic safety switches to the SRB-E-...
safety-monitoring module is only admitted when the
requirements of the standard IEC 60947-5-3 are observed.
As the technical data are regarded, the following minimum
requirements must be met:
• Switching capacity: min. 240 mW
• Switching voltage: min. 24 VDC
• switching current: min. 10 mA
For example, the following safety sensors meet the
requirements:
• BNS 36-02Z(G), BNS 36-02/01Z(G)
• BNS 260-02Z(G), BNS 260-02/01Z(G)
When sensors with LED are wired in the control circuit
(protective circuit), the following rated operating voltage must
be observed and respected:
• 24 VDC with a max. tolerance of –5%/+20%
Otherwise availability problems could occur, especially in
series-wired sensors, where a voltage drop in the control
circuit is triggered by LED's for instance.
6. Diagnostic
6.1 LED indications
LED Function
Display type
RUN
Ready for operation
Continuously lit
Not a valid application
Flashes
In 1
Input S12 closed
Continuously lit
Time window for synchronicity exceeded
Flashes quickly
Second channel,
input S22 has not opened
Flashes slowly
In 2
Input S22 closed
Continuously lit
Time window for synchronicity exceeded
Flashes quickly
Second channel,
input S12 has not opened
Flashes slowly
Out 1
Safety output STOP 0 ON
Continuously lit
No release signal on input X7
Flashes quickly
Safety outputs waiting for start (input X2)
Flashes slowly
Feedback circuit not closed (input X3)
Flashes slowly
Out 2
Safety output STOP 1 ON
Continuously lit
No release signal on input X7
Flashes quickly
Safety outputs waiting for start (input X2)
Flashes slowly
Feedback circuit not closed (input X3)
Flashes slowly
Single flashing of all LEDs with mains on
6.2 Malfunctions
Malfunctions and fault causes are displayed with the ERR-LEDs via
short and long flashing signals
LED Error cause
Long flash Short flash
ERR
Operating voltage too low
1
1
Operating voltage too high
1
2
Invalid rotary switch setting
1
3
External voltage on output Qt1
1
5, 7, 9
External voltage on output Qt2
1
2
6, 8
1
Termination to GND on output Qt1
2
2
Termination to GND on output Qt2
2
3
Cross-wire between inputs S12 and S22
2
4
Undefined level on outputs:
X2
3
4
X3
3
5
X7
3
9
S12
2
9
S22
3
1
Rotary switch > 30 sec. to position C
6
8
Application changed and
activation of operating voltage
LEDs flash quickly:
RUN, In 1, In 2, Out
Application was changed
during active operation
LEDs flash quickly:
ERR, In 1, In 2, Out
Other fault codes:
Consult technical sales dept. at Schmersal
