4
Operating instructions
Safety sensor
EX-BNS 250-2187
EN
4. Electrical connection
4.1 General information for electrical connection
The electrical connection may only be carried out by author-
ised personnel in a de-energised condition.
The safety sensors must be wired in accordance with the specified wire
colours.
4.2 Contact variants
The contact position shows the actuated sensor function when the
safety guard is closed.
1 NO contact / 2 NC contact
EX-BNS 250-12Z-2187-3G/D
GY 13
GN 21
WH 31
14 PK
22 YE
32 BN
4.3 Connection
For safety-monitoring modules with antivalent inputs, the wires of the
safety sensor must be wired as follows:
NO contacts: GY (13) und PK (14)
at the "NO input" of the safety-
monitoring module
NC contacts: GN (21) und YE (22)
at the "NC input" of the safety-
monitoring module
NC contacts: WH (31) und BN (32)
can be used for signalling
purposes.
In this way, the coding of the safety sensor is ensured.
5. Set-up and maintenance
5.1 Functional testing
The safety function of the safety components must be tested. The fol-
lowing conditions must be previously checked and met:
1. The installation is executed according to the instructions
2. The connection is executed correctly
3. The safety component is not damaged
4. The system is free of dirt and soiling (in particular metal chips)
5. Check cable entry and connections in a de-energised condition
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 the fitting of the sensor and the actuator
• Remove possible metal chips
• Check the cable for damage.
• Check cable entry and connections in de-energised condition
Damaged or defective components must be replaced.
6. Disassembly and disposal
6.1 Disassembly
The safety switchgear must be disassembled in a de-energised condi-
tion only.
6.2 Disposal
The safety switchgear must be disposed of in an appropriate manner in
accordance with the national prescriptions and legislations.
