4
Operating instructions
Safety-monitoring module
SRB 201ZH
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 1 × 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 with two pushbuttons A and B (see 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
•
S
= Feedback circuit
L1
L1
S
K1
F3
K2
K1
31
31
23
23
13
13
S21
S21 S22
S22
S12
S12
S11
S11
A2.1
A2.1
A1.1
A1.1
A1
A1
X1
X1
X2
X2
32
24
14
A2
A2
a)
F1
F2
K2
K
A
K
B
K
A
K
B
K
A
K
B
N
Fig 2 a) Logic
8.2 Sensor configuration
Two-hand control to DIN EN 574 and EN 60204-1 (see Fig. 3)
• Malfunctions of every contact as well as earth leakages and cross-
wire shorts are detected
• Feedback circuit
S
:
the feedback circuit is integrated as shown The safety-technical
function of external positive-guided contactors is monitored by a
series-wiring of the NC contacts with the terminals X1 and X2 In idle
state, this circuit must be closed If the feedback circuit is not required,
establish a bridge
• Safety category III/C to DIN EN 574
• Category 4 – PL e to DIN EN ISO 13849-1 possible.
Two-hand control to DIN EN 574 and EN 60204-1 (see Fig. 4)
• Malfunctions of every contact as well as earth leakages and cross-
wire shorts are detected
• Feedback circuit
S
:
the feedback circuit is integrated as shown The safety-technical
function of external positive-guided contactors is monitored by a
series-wiring of the NC contacts with the terminals X1 and X2 In idle
state, this circuit must be closed If the feedback circuit is not required,
establish a bridge
• Safety category III/C to DIN EN 574
• Category 4 – PL e to DIN EN ISO 13849-1 possible.
S11
A2
A1
A1.1
S12
A2.1
S21
A2.1
S22
A1.1
X2
X1
A
0 VDC
24 VDC
B
S
S11
S12
S21 S22
X2
X1
A
0 VDC
24 VDC
B
S
Fig. 3
Fig. 4
