EUCHNER MGB-L2-xxxAPx-xxx - Manual (Page 24)

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Operating Instructions MGB-L1...AR.-... / MGB-L2...AR.-... and MGB-L1...AP.-... / MGB-L2...AP.-...
10.6 Notes on operation with control systems
General notes
Do not use a control system with pulsing or switch off the pulsing function
in your control system. The device generates its own pulsed signal for short
circuit monitoring on the output lines FO1A/FO1B. A downstream control
system must tolerate these pulses, which may have a length of up to 1 ms.
The pulses are also present when the safety outputs are switched off (only on FO1A).
Depending on the inertia of the connected device (control system, relay, etc.), this
can lead to short switching processes (only on configuration as AR device).
There must also not be any pulsed signals on the inputs (FI1A/FI1B). The MGB is
connected statically to 24 V DC (connection comparable with light barriers, OSSD)
Do not use a control system with pulsing or switch off the pulsing function in
your control system. The device generates its own pulsed signal for short cir-
cuit monitoring on the output lines FO1A/FO1B. A downstream control system
must tolerate these pulses, which may have a length of up to approx. 300µs.
The pulses are not present when the safety outputs are switched off.
The inputs on an evaluation unit connected must be positive-switching, as the two
outputs on the safety switch deliver a level of +24 V in the switched-on state.
Note:
Due to the fact that the short circuit monitoring is undertaken by the device
itself, the Performance Level in accordance with EN 13849 is not reduced if the
control system pulsing is switched off.
Connection to safe control systems
To make easier the operation of the guard locking solenoid with a safe control
system, along with IMP the MGB has the control input IMM.
Important:
The above mentioned dual-channel control of the guard locking does not provide
increased safety, as the device-internal control of the guard locking is only of
single-channel design.
AR
AP