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Operating instructions
Non-Contact Safety System CES-A-UEA-02B/CES-A-UEA-04B
8. Electrical connection
WARNING
If there is a mistake, loss of the safety function due to incorrect connection.
Ì
Monitoring outputs must not be used as safety outputs.
Ì
Lay the connecting cables with protection to prevent the risk of short circuits.
NOTICE
Risk of damage to equipment or malfunctions as a result of incorrect connection.
Ì
All the electrical connections must either be isolated from the mains supply by a safety transform-
er according to IEC 61558-2-6 with limited output voltage in the event of a fault, or by other equiv-
alent isolation measures.
Ì
All electrical outputs must have an adequate protective circuit for inductive loads. The outputs
must be protected with a free-wheeling diode for this purpose. The switch-on current may have to
be limited for capacitive loads.
Ì
The tightening torque for the screws on the connection terminals must be 0.6 ... 0.8 Nm.
Ì
The connection cable for the read heads must only be extended using EUCHNER plug connectors,
and adequate consideration must be given to EMC. Intermediate terminals must not be used.
Ì
The shield on the connection cable for the read head must be connected to the appropriate termi-
nal SH1 ... 4 on the evaluation unit. The portion of cable from which insulation is stripped should
be kept as short as possible (max. 3 cm).
8.1. Notes about
Important!
Ì
For use and operation as per the
Class 2 circuits" must be used.
Alternative solutions must comply with the following requirements:
- Electrically isolated power supply unit in combination with fuse as per UL248. This fuse should be
1) Note on the scope of the UL approval: The devices have been tested as per the requirements of UL508 and CSA/C22.2 no. 14 (protection against electric shock
and fire).
8.2. Safety in case of faults
Ì
The operating voltage U
Ì
The connections for the read heads are not short circuit-proof.
Ì
A short circuit between 13/14 and 23/24 can be detected only by means of external pulsing.
Ì
A short circuit in the cable can be excluded by laying the cable with protection.
8.3. Fusing of the power supply and the safety contacts
Ì
Provide external contact fuses (6 A gG fuse or 6 A circuit breaker, characteristic B or C) for relay outputs.
Ì
The power supply must be protected with a max. 8 A fuse ahead of terminal U
12
designed for max. 3.3 A and should be integrated into the 30 V DC voltage section.
is reverse polarity protected.
B
requirements
, a power supply with the feature "for use in
1)
.
B
(Translation of the original operating instructions) 2097098-18-10/19
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