9
CHAPTER2 PROFIBUS Unit
2-4
Parallel I/O connector
The I/O connector must be wired into the controller so install as shown below even if not
using the controller’s parallel I/O.
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When the ERCX/SRCX/DRCX series controllers are used:
1. Short Pin No. A-24 (EMG 1) and B-24 (EMG 2).
2. Short Pin No. B-4 (LOCK) and A-15, to B-15 (0V).
3. Connect an external 24 volts to Pin No. A-13, B-13 (+IN COM).
(On DRCX and SRCX you can connect to A-14, B-14 (+24V) and to A-
13, B-13 (+IN COM) instead of connecting to an external 24 volt supply.
If Step 1 is not completed, an emergency stop will occur. If Step 2 is not completed, an
interlock will be applied. In either case, the controller cannot be operated (see Chapter
4).
Note that 24 volt power will not be supplied to the I/O circuit unless shorted as in 3.
An alarm is issued (06:24V POWER OFF) when power is not supplied and the opera-
tion disabled.
Please refer to “I/O Interface” in the controller instruction manual for detailed infor-
mation on parallel I/O operation.
Row B, No. 1
Row A, No. 1
Row B
Row A
The register in the PROFIBUS unit has an emergency stop input however this is
just for control by the software and is not by itself totally adequate. So installing
an interlock circuit for emergency stop using the above mentioned A-24 (EMG1)
and B-24 (EMG2) is recommended.
