PSEN cs5.1 M12/8
Operating Manual PSEN cs5.1 M12/8
1003419-EN-06
10
Feasibility monitoring for safety inputs S11 and S21
}
If one safety input switches from high to low, while the other safety input remains high,
an unequal status is displayed:
Input LED has quick yellow flashes
and Device LED
flashes red
}
If this safety input switches back from low to high, while the other safety input remains
high, a feasibility error is displayed and a partial operation lock is triggered:
Input LED
flashes yellow and Device LED flashes red
A switch to a high signal will only lead to normal switch operation if both inputs had a low
signal. From this moment on, the switch to high may occur (partial operation lock see
}
Diagnostic input Y1
If a fieldbus module of the SDD is used, the diagnostic input Y1 is automatically activ-
ated and data is read.
If no fieldbus module of the SDD is used, the diagnostic input Y1 is not used.
}
Signal output/diagnostic output Y32
The status of the actuator is output. If a fieldbus module of the SDD is used, the signal
output/diagnostic output for the writing of data is activated.
Block diagram
A1 A2
S11 S21
12 22
Y32
Y1
SDD Input
SDD Output
Power
Input
Receiver
Actuator
Safety Device Diagnostics
Safety Device Diagnostics is an option that can be selected independently of the safety-re-
lated wiring.
When using the Safety Device Diagnostics, up to 16 sensors connected in series can be
connected as a subscriber to a fieldbus module.
The communication of the sensors with the fieldbus module is automatically built up again
with
each
new supply of the supply voltage. As a result, a sensor can be exchanged, e.g.
when servicing, without the need for special measures.
An exchange can be detected via the fieldbus module e.g. through the serial number.
