EUCHNER CES-AZ-ALS-xxx (Unicode) - Manual (Page 10)

Operating Instructions Safety System CES-AZ-ALS-...
10
Electrical connection
Warning!
In case of an error, loss of the safety function through incorrect connection.
Ì
Door monitoring outputs must not be used as safety outputs.
Ì
Lay the connection cables with protection to prevent the risk of short cir-
cuits.
Caution!
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 transformer according IEC EN 61558-2-6 with limited output volt-
age in the event of a fault, or by other equivalent 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 pur-
pose.
Ì
Use cable material made of copper with a temperature resistance of min.
75 °C.
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 screen on the connection cable for the read head must be connected
to the appropriate terminal 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).
Safety in case of faults
Ì
The operating voltage U
B
is reverse polarity protected.
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.
Fuse protection of the power supply and the safety
contacts
Ì
Provide external contact fuses (6 A gG fuse or 6 A circuit breaker, characteris-
tic B or C) for relay outputs.
Ì
The power supply is to be protected with a max. 8A fuse before terminal U
B
.