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Chapter 1
Introducing Block I/O
1-2
Analog block outputs are configured at the factory for either a current
output or a voltage output. Outputs are not user-configurable.
Figure 1.1 shows the physical features of the block I/O.
Figure 1.1
Major Features of the Analog Block I/O Modules (1791 N4V2 shown)
Removable
Terminal Strip for
Input, Output, Remote
I/O and Power
Connections
Equipment
Grounding
Stud
Terminal Strip - Remote I/O link, power and input/output connections are
made to the removable terminal strip for easy connection of wiring.
Switch Assembly - The modules contain two switch assemblies. Use these
assemblies to make the following settings:
I/O rack number
starting I/O group
communication rate
last I/O group
last state
transfer type
processor restart/lockout
Status Indicators - Indicators display the status of module power,
communication and fault. Use these indicators to help in troubleshooting.
1791 N4V2
ANALOG BLOCK
1
POWER
COMM
FAULT
30
2 mounting holes
for 1/4 inch screws
Indicators
Switch
Assemblies
12631 I
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