5
SRB 401LC
Operating instructions
Safety-monitoring module
EN
Single-channel guard door monitoring circuit with interlocking
devices to EN 1088 (see Fig. 8)
• At least one contact with positive break required
• Wire breakage and earth leakage in the control circuits are detected
• Control category 1 – PL c to DIN EN ISO 13849-1 possible, when
tested to DIN EN ISO 13849-1, paragraph 652
Dual-channel guard door monitoring circuit with interlocking
device to EN 1088 (see Fig. 9)
• At least one contact with positive break recommended
• Wire breakage and earth leakage in the control circuits are detected
• Cross-wire shorts between the control circuits are detected
• Due to the integration of the NC contacts in the power supply, it is
possible that not all faults in the sensor technology are detected, as
some faults are not saved because of the switch-off of the operating
voltage An accumulation of faults could cause the safety function to
be lost As a result, control category 3 can be reached at the most
• Category 3 – PL d to DIN EN ISO 13849-1 possible
Fig. 8
Fig. 9
S12
S11
A2
–UB
A1
+UB
S12
S11
8.4 Actuator configuration
Single-channel control with feedback circuit (Fig. 10)
• Suitable for increase in capacity or number of contacts by means of
contactors or relays with positive-guided contacts
•
S
= Feedback circuit and external reset in series If the feedback
circuit is not required, establish a bridge
Dual-channel control with feedback circuit (Fig. 11)
• Suitable for increase in capacity or number of contacts by means of
contactors or relays with positive-guided contacts
•
S
= Feedback circuit and external reset in series If the feedback
circuit is not required, establish a bridge
Fig. 10
Fig. 11
14
S33
S34
13
K
A
K
A
L1
N
S
14
S33
S34
13
K
B
K
A
L1
N
K
B
K
A
S
