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Operating instructions
Safety bumpers
4. Electrical connection
4.1 General information for electrical connection
The electrical connection may only be carried out by
authorised personnel in a de-energised condition.
The safety bumpers are connected through the permanently connected
four-wire sheathed cable. The individual cables are marked with
the digits 1 ... 4 (Fig. 6). To protect larger surfaces, multiple safety
bumpers can be connected together to build a large surface. Maximum
6 bumpers may be connected to a safety-monitoring module. The
maximum cable length to the safety-monitoring module must not
exceed 200 m. To this effect, individual safety bumpers are wired in
series (Fig. 7). More information about the connection of the safety
bumpers can be found in the wiring example in appendix as well
as in the operating instructions of the SRB301ST-24V-(V2) or
SRB301ST-230V safety-monitoring module.
Fig. 6
Fig. 7
5. Set-up and maintenance
5.1 Functional testing
The safety function of the safety bumper must be tested. The following
conditions must be previously checked and met:
1. Firm and non-deforming fixation of the safety bumper to the floor
2. Fitting and integrity of the power cable
3. Actuate the bumper to check whether the output relays of the safety-
monitoring module are disabled and stop the hazardous movement
of the machine
5.2 Maintenance
A regular visual inspection and functional test, including the following
steps, is recommended:
1. Check fitting of the safety bumper
2. Check the safety bumper and especially the skin for damages
3. Remove all debris (dust, chips, etc.) from the safety bumper
4. Check the cable for damages
5. Functional test to chapter 5.1
recommended test interval: daily functional test
Maintenance: Please observe that the safety function must
be triggered at least once a year to test the system!
Damaged or defective components must be replaced.
6. Disassembly and disposal
6.1 Disassembly
The safety bumper must be disassembled in de-energised condition
only.
6.2 Disposal
The safety bumper must be disposed of in an appropriate manner in
accordance with the national prescriptions and legislations.
7. Appendix
7.1 Wiring example
The application examples shown are suggestions. They however do not
release the user from carefully checking whether the switchgear and its
set-up are suitable for the individual application.
Fig. 8: Wiring example with SRB301ST-24V-(V2)
a) Logic
J = Reset button
S = Feedback circuit
Fig. 9: Wiring example with SRB301ST 230V
a) Logic
J = Reset button
S = Feedback circuit
Fig. 10: Bumper series-wiring
EN
SSG-SB-L
11
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