Signal Connections
Chapter 3
ER-8/16 User Manual
3-8
© National Instruments Corporation
Daisy Chaining the ER-8/16
To expand your system from 16 channels to 24 channels, connect a 26-pin NB7 ribbon cable
from the ER-16 OUT connector to the ER-8 IN connector.
Note:
DO NOT
connect an external supply to the ER-8 (the receiving unit). Verify that SW1 is
in the INT position on the receiving unit. Connect the external supply to the sending
unit.
The power supply will also be daisy-chained through the NB7 cable to the expanded system.
To expand your system from 16 channels to 32 channels, connect a 26-pin NB7 ribbon cable
from one ER-16 OUT connector to the other ER-16 IN connector.
Note:
DO NOT
connect an external supply to the ER-16 (the receiving unit). Verify that SW1
(see Figure 2-1) is in the INT position on the receiving unit. Connect the external
supply to the sending unit.
The power supply will also be daisy-chained through the NB7 cable to the expanded system.
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.
Using the SC-205X Series with the ER-8
You can use your SC-205X Series cable adapter with the Lab or MIO boards to control the ER-8.
Connect the 26-pin cable to the ER-8 IN connector only. In this configuration, you can control
only channels 1 through 8. Digital lines—port A<0..7> as shown in
Figure 3-3a—control the relays. Port B<0..7> is not used.
Warning: When connecting more than one ER-8 with any of the SC-205X Series cable
adapters, verify that SW1 (see Figure 2-1) is at the EXT position and that you are
using an external power supply.
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
incorrect connections.
DO NOT
attempt to connect an ER-16 to any of the SC-205X Series cable adapters.
For additional information on the SC-205X Series cable adapters refer to the SC-205X Series
User Manual.