PNOZ X2.1C
Operating Manual PNOZ X2.1C
1003973-EN-07
11
NOTICE
With single-channel wiring the safety level of your machine/plant may be
lower than the safety level of the unit (see
Safety characteristic
data [
16]
).
Start circuit
Automatic start
Manual start
S33
S34
S3
NOTICE
In the event of an automatic start or manual start with bridged start
contact (fault):
The unit starts up automatically when the safeguard is reset, e.g. when the
E-STOP pushbutton is released. Use external circuit measures to prevent
an unexpected restart.
Feedback loop
Automatic start
Manual start
Contacts from external contactors
K5
K6
K5
L1
N
K6
S33
13 (23)
S34
14 (24)
Legend
}
S1/S2: E-STOP/safety gate switch
}
S3: Reset button
}
: Switch operated
}
: Gate open
}
: Gate closed
Operation
When the relay outputs are switched on, the mechanical contact on the relay cannot be
tested automatically. Depending on the operational environment, measures to detect the
non-opening of switching elements may be required under some circumstances.
