4
Operating instructions
Safety-monitoring module
SRB 301/CL1
EN
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
forwards.
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.
K
A
K
B
K1
K2
F1
Ui
C
S1
C1
D1
K
A
K
B
D
a)
S
J
L1
N
K
A
K
B
K1
K2
13
23
14
24
33
34
41
42
S2
X1
X2
Fig. 2
a) Logic
S
= Feedback circuit
8.2 Start configuration
External reset button (Fig. 3)
• The external reset button is integrated as shown.
• The safety-monitoring module is activated upon actuation.
Automatic start (see Fig. 4)
• The automatic start is programmed by connecting the feedback circuit
to the terminals. 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!
• Caution: Within the meaning of EN IEC 60204-1 paragraph 9.2.5.4.2
and 10.8.3, the operating mode "automatic start" is only restrictedly
admissible. In particular, any inadvertent restart of the machine must
be prevented by other suitable measures.
Due to the operating principle of the electronic fuse,
the customer must check that no hazard is caused by
an unexpected restart in circuits without reset button
(automatic reset).
K
B
J
S
K
A
X2
X1
K
B
S
K
A
X2
X1
Fig. 3
Fig. 4
8.3 Sensor configuration
Dual-channel emergency stop circuit with command devices to
DIN EN ISO 13850 (EN 418) and EN 60947-5-5 (Fig. 5)
• Wire breakage and earth leakage in the control circuits are detected.
• Cross-wire shorts between the control circuits are detected.
• Category 4 – PL e to DIN EN ISO 13849-1 possible.
C1
S1
D1
S2
Fig. 5
Dual-channel guard door monitoring circuit with interlocking
device to EN 1088 (Fig. 6)
• With at least one positive-break position switch
• Wire breakage and earth leakage in the control circuits are detected.
• Cross-wire shorts between the control circuits are detected.
• Category 4 – PL e to DIN EN ISO 13849-1 possible.
C1
S1
D1
S2
Fig. 6
