Reer MZERO Installation, Use And Maintenance Manual page 76

STAND ALONE PROGRAMMABLE SAFETY CONTROLLER
Figure 34 - Traces relative to "Guard Lock" block operation in the no gate mode.
Operation in the "with Gate" mode
In this case, the user must NOT select the "Gate not
present" parameter.
The Gate input must always be connected to an
"E-GATE" input element (see the E-GATE (safety gate
device) section on page 44) that verifies the status of the
door/gate.
The Lock_Fbk input must always be connected to a "LOCK
FEEDBACK" input element (see the LOCK FEEDBACK
section on page 46) that verifies the status of the guard
lock electromagnet.
The UnLock_cmd input can be connected freely in the
diagram and determines the request to unlock the guard
lock (when set to LL1).
The Output signal is LL1 (TRUE) if the safety guard is closed and locked. When an unlock command
is applied to the UnLock_cmd input, the Output signal is set to LL0 and the guard lock is unlocked
via the LockOut signal. The Output signal can also be set to LL0 (FALSE) when error conditions
are present (e.g. open door with guard lock locked, Feedback Time exceeding the maximum
allowed, etc.).
When the Unlock_cmd signal is detected, the LockOut signal unlocks the guard lock after the
UnLock Time, a parameter that can be defined by the user.
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