Publication 1734-UM001D-EN-P - April 2008
118 POINT I/O Module Data
I/O messages are sent to (consumed) and received from (produced) the
POINT I/O modules. These messages are mapped into the processor’s
memory.
The 1734D-IB8XOB8E module produces one byte of input data (scanner Rx)
status. It consumes one byte of output data (scanner Tx).
ATTENTION
Whatever field power you supply is connected to the
internal field-power bus. For example, if 120V ac is applied
to the power connections, there will be 120V ac applied to
the modules through the internal field-power bus.
POINT I/O modules to the right of the module will also
have that internal power bus voltage applied, unless you use
a 1734-FPD, 1734-EP24DC, or 1734-EPAC module to
interrupt and change the field power-bus voltage.
Default Data Map for the 1734D-IB8XOB8E dc Input/Output Module
Message Size: 1 Byte
76543210
Produces
(scanner Rx)
Ch7 Ch6 Ch5 Ch4 Ch3 Ch2 Ch1 Ch0 Input Data
Where:0 = off, 1 = on
Message Size: 1 Byte
CH
SH
24
CL
RT
En
CH
CL
GND
5V
DeviceNet
Connector
POINTBus
Expansion
Port
Field Bus
Connector
24V
to 5V
Microprocessor
I/O Circuits
I/O Connections
Power
Connections
41971
120V ac or 24V dc
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