EUCHNER CES-I-AR-U-C04 (Unicode) - Manual (Page 10)

Operating Instructions Safety Switch CES-I-AR-U-C04
10
Caution!
Ì In order to avoid EMC interference, the physical environmental and operating
conditions at the installation site of the device must comply with the require-
ments according to the standard EN 60204-1:2006, section 4.4.2 (EMC).
Important!
If the device does not appear to function when operating voltage is applied (e.g.
green STATE LED does not flash), the safety switch must be returned unopened
to the manufacturer.
Safety in case of faults
Ì The operating voltage U
B
is reverse polarity protected.
Ì The contacts FO1A/FO1B are short circuit-proof.
Ì A short circuit between FO1A and FO1B is detected by the switch.
Ì A short circuit in the cable can be excluded by laying the cable with protection.
Fuse protection for power supply
The power supply must be provided with fuse protection depending on the current
required for the outputs. The following rules apply:
Max. current consumption of a switch I
max
I
max
= I
UB
+ I
OD
+ I
FO1A+FO1B
I
UB
= Switch operating current (35 mA)
I
OD
= Monitoring output load current (max. 50 mA)
I
FO1A+FO1B
= Load current of safety outputs FO1A + FO1B (2 x max. 200 mA)
Requirements for connection cables
Caution!
Risk of damage to equipment or malfunctions as a result of incorrect connec-
tion cables.
Ì Use connection components and connection cables from EUCHNER
Ì On the usage of other connection components, the requirements in the fol-
lowing table apply. EUCHNER provides no warranty for safe function in case
of failure to comply with these requirements.
Ì The connection cable must not be longer than 200 m in total.
Observe the following requirements with respect to the connection cables:
Parameter Value Unit
Conductor cross-section 0.14 ... 0.34 mm²
R max. 150 W /km
C max. 120 nF/km
L max. 0.65 mH/km
Recommended cable type LIYY 8x0.34 mm²