EUCHNER MGB-L1 AR Series User Manual

Operating Instructions Safety Systems
MGB-L1…-AR.-… / MGB-L2…-AR.-… and MGB-L1…-AP.-… / MGB-L2…-AP.-…
24
(Translation of the original operating instructions) 2119167-06-10/20
12.1. Notes about
Important!
Ì This device is intended to be used with a Class 2 power source in accordance with UL1310
1)
.
As an alternative a LV/C (Limited Voltage/Current) power source with the following properties can
be used:
- This device shall be used with a suitable isolating source in conjunction with a fuse in accordance
with UL 248. The fuse shall be rated max. 3.3A and be installed in the max. 30V/DC power supply
to the device in order to limit the available current to comply with the requirements. Please note
possibly lower connection ratings for your device (refer to the technical data).
1) Notice on the scope of the UL approval: only for applications as per NFPA 79 (Industrial Machinery). The devices are tested in accordance with UL508 (protection
against electric shock and re).
12.2. Safety in case of faults
Ì The operating voltage UB is reverse polarity protected.
Ì The safety outputs 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.
12.3. Fuse protection for power supply
The power supply must be provided with fuse protection depending on the number of devices and the 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 + control elements
I
FO1A+FO1B
= Load current of safety outputs FO1A + FO1B (2 x max. 200 mA)
AR
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
Assignment of the currents to the fuse circuits
Current Fuse circuit F1 Fuse circuit F2
I
UB
80 mA
I
FO1A+FO1B
(2 x max. 200 mA)
I
UA
I
solenoid
= 375 mA
I
OD,OT,OL,OI
= (4 x max. 50 mA)
I
control elements
= max. 100 mA
(per control element)
I
indicators
= max. 5 mA
(per indicator)

EUCHNER MGB-L1 AR Series Specifications

General

Brand	EUCHNER
Model	MGB-L1 AR Series
Category	Safety Equipment
Language	English