Festo Checkbox Compact CHB-C-C, Руководство пользователя

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4. I/O module extensions of the Checkbox PLC
4-14
Festo P.BE-CB-COMP-EN en 0211a
4.3.5 Buffer zone sensors/small parts conveyor
Internal circuitry The I/O signals for the buffer zone sensors and small parts
conveyor on the connection “PLC” are wired internally with
the connection “BUFFER/FEEDER.”
BUFFER
FEEDER
PLC
Function
O/1 O/21
– 24 V reference voltage for
buffer zone sensors
– Ready to operate
– Controlling the conveyor device
O/2 O/8 24 V power output for controlling
a small parts conveyor (feeder)
O/3 O/4
0 V reference voltage
Buffer zone sensors
I/4
I/12
Buffer zone sensor 1
------ I/13 Buffer zone sensor 2
Small parts conveyor
Time reaction When the Checkbox PLC is started, it triggers the actuator
which sorts out bad parts. This is to ensure that there are no
(unchecked) parts on the conveyor device.
A delay of a few seconds then occurs between the external
start command (Remote start) and the signal for switching on
the small parts conveyor (feeder). The duration of this delay
depends on ambient parameters, such as transport speed
and geometrical variables.