4
Operating instructions
Safety-monitoring module
SRB 301AN
EN
6. Set-up and maintenance
6.1 Functional testing
The safety function of the safety-monitoring module must be tested.
The following conditions must be previously checked and met:
1. Correct fixing
2. Check the integrity of the cable entry and connections
3. Check the safety-monitoring module's enclosure for damage.
4. Check the electrical function of the connected sensors and their influ-
ence on the safety-monitoring module and the downstream actuators
6.2 Maintenance
A regular visual inspection and functional test, including the following
steps, is recommended:
1. Check the correct fixing of the safety-monitoring module
2. Check the cable for damages
3. Check electrical function
The device has to be integrated into the periodic check-ups
according to the Ordinance on Industrial Safety and Health,
however at least 1x/year.
Damaged or defective components must be replaced.
7. Disassembly and disposal
7.1 Disassembly
The safety-monitoring module must be disassembled in a de-energised
condition only.
Push up the bottom of the enclosure and hang out slightly tilted for-
wards.
7.2 Disposal
The safety-monitoring module must be disposed of in an appropriate
manner in accordance with the national prescriptions and legislations.
8. Appendix
8.1 Wiring examples
Dual-channel control, shown for a guard door monitor with two
position switches where one has a positive break contact; with
external reset button
J
(Fig. 2)
• Relay outputs: Suitable for 2-channel control, for increase in capacity
or number of contacts by means of contactors or relays with positive-
guided contacts.
• The control system recognises wire-breakage, earth faults and cross-
wire shorts in the monitoring circuit.
•
S
= Feedback circuit
J
S
L1
A1
S21 S22 S13 S14 X1 X2 X3
13
23 33
Y1
24 34
14
A2
N
K2
K1
Ui
F1
K1
K2
a)
K
A
K
B
K
B
K
A
K
A
K
B
Fig. 2
a) Logic
8.2 Start configuration (with edge detection)
External reset button (Fig. 3)
• The external reset button is integrated in the feedback circuit in series.
• The safety-monitoring module is activated upon actuation of the reset
button.
Automatic start (Fig. 4)
• The automatic start is programmed by connecting the feedback circuit
to the terminals X1-X3. If the feedback circuit is not required, establish
a bridge.
• Caution: Not admitted without additional measure due to the risk of
gaining access by stepping behind!
• When the SRB 301AN safety-monitoring module is used with the op-
erating mode "Automatic start", an automatic restart after a shutdown
in case of emergency must be prevented by the upstream control to
EN 60204-1 paragraph 9.2.5.4.2.
Due to the operating principle of the electronic fuse, the cus-
tomer must check that no hazard is caused by an unexpected
restart in circuits without reset button (automatic reset).
K
A
J
S
K
B
X2
X1
X3
X1
K
A
K
B
Fig. 3
Fig. 4
