I/O Connectors
Appendix B
ER-8/16 User Manual
B-6
© National Instruments Corporation
Table B-4. 26-Pin OUT Connector Pin Descriptions
Pin
Signal Name
Description
10, 12, 14,
16, 18, 20,
22, 24
PD<7..0>
Port D Channels 7 through 0—These signals are 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.
9, 11, 13,
15, 17, 19,
21, 23
PC<7..0>
Port C Channels 7 through 0—These signals are 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.
2, 4, 6,
8, 26
GND
Ground—These pins are connected to the ground on the
ER-8/16.
1, 3, 5, 7,
25
+5 V
+5 VDC supply—These pins are connected to the +5 V
supply on the ER-8/16.
