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Always turn the PC power off before changing a Unit’s I/O number. The new I/O
number will not be recognized unless the PC has been turned off. Do not set
more than one Unit to the same I/O number or set I/O numbers so that the same
I/O word is allocated to more than one Unit, e.g., if you set a 64-point Unit to I/O
number 0, you cannot use I/O number 1 for any Unit.
Refer to Appendix B Specifications for the specifications and dimensions of the
Units.
C-shape Units (32-point Units)
I/O Unit lock notch
Nameplate
I/O indicators:
Indicate ON/OFF status of points
40-pin connector
I/O number setting switch
D-shape Units (64-point Units)
I/O Unit lock notch
Nameplate
I/O indicators:
Indicate ON/OFF status of I/O points
40-pin connectors
I/O number setting switch
Indicator switch:
Determines whether the status of
connector 1 or connector 2 I/O points
are indicated by the I/O indicators.
I/O Units Section 2-5
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