Using Dio-32 Boards; Power Supply - National Instruments ER-8 User Manual

Signal Connections
You can control a maximum of 24 channels using this connector, one ER-16, and one ER-8.
Daisy chain the ER-8 to the ER-16 using the NB7 cable.
The ER-8 uses port A<0..7> to control channels 1 through 8. Port C<0..7> wraps back to the
26-pin OUT connector.
The ER-16 uses port A<0..7> to control channels 1 through 8 and port B<0..7> to control
channels 9 through 16. Port C<0..7> wraps back to the 26-pin OUT connector. For additional
information on daisy chaining, refer to the Daisy Chaining the ER-8/16 section later in this
chapter.

Using DIO-32 Boards

If you are using a National Instruments DIO-32 board to control the ER-8/16, connect the cable
to the DIO-32 connector.
Note: You will need an external +5 V power supply if you use this connector.
Warning:
Connecting the cable to the wrong connector can damage the ER-8/16 or your
DAQ device. National Instruments is
such connections.
You can control a maximum of 32 channels using the DIO-32 connector and two ER-16s. Daisy
chain one ER-16 to the other ER-16 using the NB7 cable.
The ER-16 uses port A<0..7> to control channels 1 through 8 and port B<0..7> to control
channels 9 through 16. Port C<0..7> and port D<0..7> wrap back to the 26-pin OUT connector.
For additional information on daisy chaining refer to the Daisy Chaining the ER-8/16 section
later in this chapter.

Power Supply

You can use either your DAQ device's internal +5 V supply or an external +5 V supply to power
up your ER-8/16. If you use an external +5 V supply, use the two screw terminals to connect
external +5 V and GND. Refer to Figure 2-1 in Chapter 2, Setup, for the location of this screw
terminal on the ER-8/16.
Warning:
Connections that exceed any of the input signal maximum ratings on the ER-8/16
can damage the ER-8/16, your computer, and the DAQ device. Maximum input
ratings for each signal are given in Appendix A, Specifications. National
Instruments is
exceed any of these ratings.
ER-8/16 User Manual
liable for any damages resulting from signal connections that
NOT
3-2
liable for any damages resulting from
NOT
© National Instruments Corporation
Chapter 3