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I/O Connectors
Appendix B
ER-8/16 User Manual
B-4
© National Instruments Corporation
Table B-2. DIO-32 Connector Pin Descriptions
Pin
Signal Name
Description
6, 5, 8, 2, 3, 7,
1, 4
PD<7..0>
Port D Channels 7 through 0—These signals are routed back
to the 26-pin OUT connector for daisy chaining to another
ER-8 or ER-16. Each of these pins controls the relay
channel of the daisy chained ER-8 or ER-16. A digital high
on these pins connects the COM contact of a channel to the
NO contact of that channel. A digital low on these pins
connects the COM contact of a channel to the NC contact of
that channel.
10, 15, 9, 16,
11, 13, 12, 14
PC<7..0>
Port C Channels 7 through 0—These signals are routed back
to the 26-pin OUT connector for daisy chaining to another
ER-8 or ER-16. Each of these pins controls the relay
channel of the daisy chained ER-8 or ER-16. A digital high
on these pins connects the COM contact of a channel to the
NO contact of that channel. A digital low on these pins
connects the COM contact of a channel to the NC contact of
that channel.
45, 46, 43, 49,
48, 44, 50, 47
PB<7..0>
Port B Channels 7 through 0—Each of these pins controls
the relay channel. A digital high on these pins connects the
COM contact of a channel to the NO contact of that channel.
A digital low on these pins connects the COM contact of a
channel to the NC contact of that channel.
41, 36, 42, 35,
40, 38, 39, 37
PA<7..0>
Port A Channels 7 through 0—Each of these pins controls
the relay channel. A digital high on these pins connects the
COM contact of a channel to the NO contact of that channel.
A digital low on these pins connects the COM contact of a
channel to the NC contact of that channel.
26, 28, 30, 32,
34
GND
Ground—These pins are connected to the internal ground on
the ER-8/16.
17–25, 27, 29,
31, 33
NC
Not connected.