EUCHNER MGB (V2.0.0) - Manual (Page 4)

MGB Help for Setup and Service
1 Connection
1.1 Connection of the buttons in the MGB
The terminal assignment of the switches (lights, buttons, emergency stop, etc.) in the cover of the MGB is not
described in the system manual. These terminals can be found in the associated data sheet of the MGB
included with every delivery. Please contact EUCHNER if the data sheet has been lost, and you will promptly be
sent a data sheet. Alternatively, you can look in the MGB catalog.
The switches and the emergency stop are floating. However, the lights and the buttons all referred to a common
potential. The terminals are to be found on connections X2 and X3.
Example:
1.2 Control of the guard locking
The guard locking is typically controlled by a PLC via one channel. The monitoring of the installed solenoid in
combination with the locking arm, which represents the locking device as defined in EN 1088, is suitable for PL e.
Two-channel control, e.g. by a safe PLC, is technically possible but does not provide improved safety. The two
connection terminals I
MP
and I
MM
are intended for this purpose.
Always use connection terminal I
MP
in case of one-channel control.
1.3 Parallel control of the guard locking
The guard locking solenoids are supplied from voltage U
A
. The inputs I
MP
serve to control the solenoids; the
current draw here is only approx. 3 mA. Several I
MP
inputs can be controlled in parallel if a common 0 V
potential is present at OV
M
.
1.4 Operation on safety relay
The MGB can be connected to most conventional safety relays. Since the outputs, similar to those on a so-
called OSSD on light barriers or light curtains, produce clock pulses, a connection as described for non-contact
systems must be used.
Alternatively, the circuit from the section “Operating on clocking outputs” can be used.
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