4
Operating instructions
Safety-monitoring module
SRB 304ST
EN
Opening the front cover (see Fig. 2)
• To open the front cover, insert a slotted screwdriver in the top and
bottom cover notch and gently lift it.
• When the front cover is open, the electrostatic discharge requirements
must be respected and observed.
• After setting, the front cover must be fitted back in position.
Only touch the components after electrical discharge!
U
B
U
i
K1
K2
13 23 33 41
A2 S21 A1.1 S22
14 24 34 42
Y1
A1 S11 S12 X5
X3
X1
X2
Y2
X4
S32
S31
Y3
SRB 304ST
U
B
U
i
K1
K2
13 23 33 41
A2 S21 A1.1 S22
14 24 34 42
Y1
A1 S11 S12 X5 X3
X1
X2
Y2
X4
S32
S31
Y3
SRB 304ST
Fig. 1
Fig. 2
Resetting the hybrid fuse
• The hybrid fuse of the safety-monitoring module can be reset
by switching the operating voltage off and back on or by actuating
button S1.
• Button S1 is located underneath the front cover of the safety-
monitoring module (see Fig. 2 and 3).
S1
Fig. 3
5.3 Notes
Signalling outputs (see fig. 4)
• The input circuits are signalled through the signalling outputs Y1
(channel 1) and Y2 (channel 2).
• The status of the hybrid fuse is signalled through signalling output
Y3. If the hybrid fuse is not activated, Y3 is supplied with operating
voltage.
+24 V
F2
Y3
Y2
Y1
Fig. 4
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
influence 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
forwards.
7.2 Disposal
The safety-monitoring module must be disposed of in an appropriate
manner in accordance with the national prescriptions and legislations.
