Specifications

I
2
C Input/Output Boards, Continued
The I
2
C DIO board makes available 8 Digital Outputs (DOs) and 6 Digital
Inputs (DIs).
Digital Input/Output
Board
Figure 2-10: I
2
C Digital Input/Output Board
There are eight DO circuits available on the DIO board. The DO consists
of three pins connected to a relay; Normally Open (NO), Normally
Closed (NC), and Common (C). When the relay is not activated (DO has
value of zero) then NO is open and NC is connected to C. When the
relay is activated (DO has a value of one) then NO connects to C, and
NC is open.
Digital Outputs
There is 500V isolation between the three pins of the DO on the
connector and the rest of the I/O board.
There are six DI circuits available on the DIO board. DI circuits consist of
a +5V Signal lead and a Common lead. There is a 500V isolation
between the DI on the connector and the rest of the DIO board.
Digital Inputs
There is a DI mode switch on the DIO board. This switch is described in
the General Board Characteristics section for the I/O boards earlier in
this chapter.
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