4.4.1 - USB-6251 DAQ
The National Instruments USB-6251 DAQ together with GMW’s Magnet Control software
provides control and monitoring of the 5971-160 Reversal Switch. If GMW’s Magnet
Control software is not used, it is still possible to computer control the 5971-160 Reversal
Switch by writing custom software to communicate with the USB-6251. The table below
describes the channels used and their functions.
USB-6251 Connections
Signal Type
Direction
6251
Terminal
Current Control Output
10V output proportional to 100%
current output
Analog
Single
Ended
Output AO-0
Current Control Common
Ground
Ground
AO-GND
Voltage Monitor
10V / 100% of the power supply’s
rated output voltage
Analog
Single
Ended
Input AI-0
Voltage Monitor Common
Analog
Input
AI-GND
Current Monitor
10V / 100% of the power supply’s
rated output current
Analog
Single
Ended
Input AI-1
Current Monitor Common
Analog
Input
AI-GND
Field M
Analog Input
AI-2
Field Monitor -
Analog Input
AI-10
Field Monitor Common Ground
Ground
AI-GND
- Reserved -
Digital Input
P0.0
Switch Temp – Low = Okay
Digital Input
P0.1
Magnet Flow – Low = Okay
Digital Input
P0.2
Magnet Temperature – Low = Okay
Digital Input
P0.3
P/S Enabled – High = Enabled
Digital Input
P0.4
Polarity Status – High = Forward
Digital Input
P0.5
Local Lockout – High = Remote
Digital Output
P0.6
Polarity Control – High = Forward
Digital Output
P0.7
Interlock Status Common
Ground -
DGND
+5V Power
Power -
+5V