Juniper Systems Allegro DAQ - Manual (Page 17)

Data Acquisition Expansion Pod 17
Switch # Name Setting Result
3 OPA_EN_H OFF Sensor Excitation control is
enabled continuously
4 DIO7_OUT ON
5 SENSOR_EXC ON The Sensor Excitation
Output is enabled; the
Sensor Excitation Bypass is
disabled
6 EXC_BYPASS OFF
Use DIO7 to enable/disable Sensor Excitation Output
The configuration switches let you program the DIO7 to enable or
disable the Sensor Excitation Output circuitry. Switch 3 configures
DIO 7 as the Sensor Excitation enabler. In turn, DIO 7 is controlled
through whatever program is running on the Allegro CX. Switch 4
disconnects the DIO7 signal from the 50-pin connector.
Set the switches as shown in the following table to make the DIO7
control the Sensor Excitation Output.
Switch # Switch Name Switch
Settings
Result
3 OPA_EN_H ON Sensor Excitation is
controlled by DIO7
4 DIO7_OUT OFF
5 SENSOR_EXC ON Sensor Excitation Output
is enabled; Sensor
Excitation Bypass is
disabled
6 EXC_BYPASS OFF
Bypass the Sensor Excitation (Output Analog Out 0 rather
than the Sensor Excitation)
The Sensor Excitation Output can be bypassed, routing the signal
from the Analog Output 0 directly to Pin 16 on the 50-pin connector
rather than first routing through the Sensor Excitation.
IMPORTANT: Become familiar with the Analog Ouput voltage current
limitations in the documentation of your NI DAQCard before reconfiguring
the Sensor Excitation to this setting. Some peripheral devices may require
more voltage than the Analog Output 0 current alone can provide.
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