EUCHNER CES-A-S5H-01 (Unicode) - Manual (Page 11)

System Manual Safety System CES-A-S5H01
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-S5...
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.
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.
Power devices which are a powerful source of interference must be installed
in a separate location away from the input and output circuits for signal pro-
cessing. The cable routing for safety circuits should be as far away as pos-
sible from the cables of the power circuits.
If a common power supply is used, all the inductive and capacitive loads
(e.g. relay contactors) connected to the power supply must be connected to
appropriate interference suppressors. 
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