Signal Connections
Chapter 3
ER-8/16 User Manual
3-2
© National Instruments Corporation
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 ex5 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
NOT
liable for any damages resulting from
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 in5 V supply or an ex5 V supply to power
up your ER-8/16. If you use an ex5 V supply, use the two screw terminals to connect
ex5 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
NOT
liable for any damages resulting from signal connections that
exceed any of these ratings.
