5
EX-BNS40S
Operating instructions
Safety sensor
EN
Technically, multiple safety sensors can be wired to one AES/SRB
safety-monitoring module. To connect multiple safety sensors (check
if authorised!), their NO contacts are wired in parallel and their NC
contacts in series. The Protect-IE-11 or -02 or PROTECT-PE-11 (-AN)
or -02 input expander module can be used to connect up to 4 safety
sensors with NC/NC or NC/NO contacts.
Safety sensors equipped with LED's shall not be wired in series,
except for the Protect-IE input expander module. As a result of this,
the luminosity of the LED's would considerably decrease and the
voltage could drop below the minimum input voltage of the downstream
safety-monitoring module. Please observe that the diagnostic coverage
could reduce if multiple safety sensors are connected to one safety-
monitoring module.
In case of series-wiring at SRB max. 1 sensor with LED
indication for U
N
.
5. Set-up and maintenance
5.1 Functional testing
The safety function of the safety components must be tested.
The following conditions must be previously checked and met:
1. Fitting of the sensor and the actuator.
2. Fitting and integrity of the power cable.
3. The system is free of dirt and soiling
(in particular metal chips).
5.2 Maintenance
In the case of correct installation and adequate use, the safety sensor
features maintenance-free functionality.
A regular visual inspection and functional test, including the following
steps, is recommended:
• Check of the safety function
• Check the fitting of the sensor and the actuator.
• Remove possible metal chips.
• Check the cable for damage.
Adequate measures must be taken to ensure protection against
tampering either to prevent tampering of the safety guard, for
instance by means of replacement actuators.
Damaged or defective components must be replaced.
6. Disassembly and disposal
6.1 Disassembly
The safety switchgear must be disassembled in a de-energised
condition only.
6.2 Disposal
The safety switchgear must be disposed of in an appropriate manner
in accordance with the national prescriptions and legislations.
