EUCHNER CES-A-C5H-01 (Unicode) - Manual (Page 11)

System Manual Safety System CES-A-C5...
11
Electrical Connection
Warning!
Loss of the safety function due to incorrect connection.
Not suitable for safety relays that realize short-circuit monitoring with different
potentials (0 V/4 V). The voltage at +LA/+LB must correspond to the informa-
tion in the technical data.
+UB
0 V OUT
0 V
+24 V
+LA
LA
+LB
LB
-LAB
S11
S12
S22
S21
A2
A1
CES-A-C5...
Warning!
In case of an error, loss of the safety function through incorrect connection.
To ensure safety, both safety outputs (LA and LB) must always be evaluated.
The monitoring output OUT must not be used as a safety output.
Lay the connection cables with protection to prevent the risk of short cir-
cuits. 
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Caution!
Risk of damage to equipment or malfunctions as a result of incorrect connec-
tion.
The inputs on an evaluation unit connected must be positive-switching, as the
two outputs on the safety switch deliver a level of +4 V in the switched-on
state.
All the electrical connections must either be isolated from the mains supply
by a safety transformer according IEC 61558--6 with limited output voltage
in the event of a fault, or by other equivalent isolation measures.
For use and operation as per the
requirements, a power supply with the
feature "for use in class 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 UL48.
This fuse should be designed for max. 3.3 A and should be integrated into
the 30 V/DC voltage section.
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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