Euchner CES-AZ-UBS-01B (Multicode) Bedienungsanleitung PDF herunterladen (Seite 10)

Operating Instructions Safety System CES-AZ-UBS-01B

Electrical Connection

Warning!

In case of an error, loss of the safety function through incorrect connection.

Ì The monitoring output OUT must not be used as a safety output.

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 61558-2-6 with limited output voltage

in the event of a fault, or by other equivalent isolation measures.

Ì 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.

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 at least

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 EU-

CHNER 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 terminal SH1 on the evaluation unit. The portion of cable from which insu-

lation is stripped should be kept as short as possible (max. 3 cm).

Safety in case of faults

Ì The operating voltage U

is reverse polarity protected.

Ì The connection for the read head is 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.

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Euchner CES-AZ-UBS-01B (Multicode) Bedienungsanleitung Seite 10