Festo Checkbox Compact CHB-C-X, Руководство пользователя

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4. I/O module extensions of the CHB−C−P/..X
4−6
Festo P.BE−CB−COMP−en en 0503c
4.3 PLC
Note the following when connecting a higher−order controller:
·
Use the PLC cable with 24−pin connector plug provided
(connection CHB−C−P/..X).
·
Connect the cables of the PLC according to the cable
assignment in appendix A.4.
·
Make sure that the maximum sum current of 1 A at the
PLC connection is not exceeded.
Reference voltage The reference voltage is available at pin 4 (GND) and pin O/7
(+ 24 V). Fuse: 700 mA, automatic reset.
Pin Reference voltage
4 0 V
e.g. as reference potential for the PLC/reference voltage for
buffer zone sensors
O/7 + 24 V DC
e.g. as voltage supply for opto−isolated PLC I/O module,
signal level after boot procedure = HIGH
Tab.4/2: Reference voltage
Load voltage Current−consuming devices can be supplied with power via
pin 4 (GND) and pin O/7 (+ 24 V) under the following condi
tions:
·
Connect only current−consuming devices which return the
complete current to the CHB−C−P/..X. In this way you can
prevent asymmetries of the currents in the outgoing and
return lines from reducing the effect of the filter.
·
Load output O/7 with maximum 700 mA.