EUCHNER CES-A-UBA-01B (Multicode) - Manual (Page 10)

Operating Instructions Safety System CES-A-UBA-01/CES-A-UBA-01B
10
Electrical Connection
Warning!
In case of an error, loss of the safety function through incorrect connection.
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To ensure safety, both safety outputs (13/14 and 23/24) must always be
evaluated.
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The monitoring output OUT must not be used as a safety output.
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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.
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All the electrical connections must either be isolated from the mains supply
by a safety transformer according IEC 61558-2-6 with limited output voltage
in the event of a fault, or by other equivalent isolation measures.
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For use and operation as per the requirements, a power supply with the
feature "for use in class 2 circuits" must be used. The same requirement ap-
plies to the safety outputs.
Alternative solutions must comply with the following requirements:
a) Electrically isolated power supply unit with a max. open-circuit voltage of 30
V/DC and a limited current of max. 8 A.
b) Electrically isolated power supply unit in combination with fuse as per UL248.
This fuse should be designed for max. 3.3 A and should be integrated into
the 30 V/DC voltage section.
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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.
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Use cable material made of copper with a temperature resistance of at least
75 °C.
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The tightening torque for the screws on the connection terminals must be
0.6 ... 0.8 Nm.
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The connection cable for the read heads must only be extended using EU-
CHNER plug connectors and adequate consideration must be given to EMC.
Intermediate terminals must not be used.
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The screen on the connection cable for the read head must be connected to
the appropriate terminal SH on the evaluation unit. The portion of cable from
which insulation is stripped should be kept as short as possible (max. 3 cm).
Important!
If the device does not appear to function when operating voltage is applied (e.g.
green STATE LED does not illuminate or flash), the safety switch must be returned
unopened to the manufacturer.