EUCHNER MGB-L2-xxxAPx-xxx - Manual (Page 19)

19
Operating Instructions MGB-L1...AR.-... / MGB-L2...AR.-... and MGB-L1...AP.-... / MGB-L2...AP.-...
Important:
Ì If the device does not appear to function when the operating voltage is ap-
plied (e.g. green Power LED does not illuminate), the safety switch must be
returned to the manufacturer.
Ì To ensure the stated degree of protection IP67 is achieved, the cover
screws must be tightened to a tightening torque of 1 Nm.
Ì Tighten screw for the cover for the mechanical release to 0.5 Nm.
10.1 Safety in case of faults
Ì The operating voltage UB 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
device.
Ì A short circuit in the cable can be excluded by laying the cable with protection.
10.2 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
UA
+ I
FO1A+FO1B
I
UB
= Device operating current (80 mA)
I
UA
= Load current of monitoring outputs OD,OT, OL and OI (4 x max. 50 mA)
+ solenoid + switches
I
FO1A+FO1B
= Load current of safety outputs FO1A + FO1B (2 x max. 200 mA)
Max. current consumption of a switch chain Σ I
max
Σ I
max
= I
FO1A+FO1B
+ n x (I
UB
+ I
UA
)
n = Number of connected devices
Current assignment to the fuses
Current Fuse circuit F1 Fuse circuit F2
I
UB
80 mA
I
FO1A+FO1B
(2 x max. 200 mA)
I
UA
I
solenoid
= 350 mA
I
OD,OT,OL,OI
= (4 x max. 50 mA)
I
operating elements
= max. 100 mA
(per operating element)
I
indicators
= max. 5 mA
(per indicator)
AR