Compact RIO’s
PCD0
26/766 E2
(HB_PCD0 26 766_E2.DOC)
SAIA-Burgess Controls Ltd.
Page 21
2.4.1
Data Width and Addressing RIO 8 I/O DP
RIO 8 I/O DP
Byte Input
Byte Output
Data width
Byte 1
Byte 2
Byte 1
Byte 2
Not used
Bit
Terminal
Not used
Bit
Terminal
0
X1.0
0
X1.0
1
X1.1
1
X1.1
2
X1.2
2
X1.2
3
X1.3
3
X1.3
4
X1.4
4
X1.4
5
X1.5
5
X1.5
6
X1.6
6
X1.6
7
X1.7
7
X1.7
1 Byte-Startaddress
2 Bit-Numbering
Each of the 8 channels can be used either as an input or an output. I.e.: for a
process map an input address space and an output address space are reserved.
Ensure that a used input channel (e.g. initiator) is not used as an output channel
at the same time, however, an output can be inverted to an input. This way the
PLC can monitor the switching function.
When using modules with digital combination channels note that you cannot
connect a 24V supply to a combination channel without connecting the module to
the power supply.
If you do, the power supply will be fed back via the output circuit of the module.
This may result in a malfunction or destruction of the output circuit.
