EUCHNER ESL-IH-AR - Manual (Page 11)

Operating Instructions ESL
11
Safety in case of faults
Ì The operating voltage U
B
is reverse polarity protected.
Ì The contacts FI1A/FI1B and FO1A/FO1B are short circuit-proof
Ì A short circuit between FI1A and FI1B or 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 number
of devices and current required for the outputs. The following rules apply:
Max. current consumption of an individual device I
max
I
max
= I
UB
+ I
OD
+ I
FO1A+FO1B
I
UB
= Switch operating current (max. 40 mA)
I
OD
= Monitoring output load current (max. 50 mA)
I
FO1A+FO1B
= Load current of safety outputs FO1A + FO1B (2 x max. 100 mA)
Max. current consumption of a switch chain Σ I
max
Σ I
max
= I
FO1A+FO1B
+ n x (I
UB
+ I
OD
)
n = Number of connected devices
Requirements for connection cables
Caution!
Risk of damage to equipment or malfunctions as a result of incorrect connection
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.
Observe the following requirements with respect to the connection cables:
Parameter Value Unit
Conductor cross-section min. 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 8x or 5x 0.34 mm²