Справочник Пользователя для National Instruments SCXI -1122
Signal Connections
Chapter 3
SCXI-1122 User Manual
3-4
© National Instruments Corporation
Front Signal Connection Descriptions
Pin
Signal Name
Description
A1
TEMP-
Temperature Sensor Reference–This pin is tied to the
temperature sensor reference in the terminal block and to
the isolation amplifier negative input in the module.
temperature sensor reference in the terminal block and to
the isolation amplifier negative input in the module.
A3
TEMP+
Temperature Sensor Output–This pin connects the
temperature sensor output to the amplifier input selector.
temperature sensor output to the amplifier input selector.
A7
+5 V
+5 VDC Isolated Source–This pin, which powers the
temperature sensor on the terminal block, has 0.5 mA of
source not protected.
temperature sensor on the terminal block, has 0.5 mA of
source not protected.
A11
VEX/2
Half Voltage Excitation Output–This pin connects to the
internal bridge completion network for quarter-bridge and
half-bridge measurements. Protected to
internal bridge completion network for quarter-bridge and
half-bridge measurements. Protected to
±
20 V maximum.
A13
VEX-
Negative Voltage Excitation Output–This pin is connected
to the voltage excitation negative output.
to the voltage excitation negative output.
A15
SENSE-
Negative Voltage Sense–This pin must be tied to VEX- at
the load for remote sensing. When using the SCXI-1322
terminal block, this pin is connected to VEX/SENSE-
screw terminals.
the load for remote sensing. When using the SCXI-1322
terminal block, this pin is connected to VEX/SENSE-
screw terminals.
A17
SENSE+
Positive Voltage Sense–This pin must be tied to VEX+ at
the load for remote sensing. When using the SCXI-1322
terminal block, this pin is connected to VEX/SENSE+
screw terminals. This pin is not protected.
the load for remote sensing. When using the SCXI-1322
terminal block, this pin is connected to VEX/SENSE+
screw terminals. This pin is not protected.
A19
VEX+
Positive Voltage Excitation Output–This pin is connected
to the voltage excitation positive output.
to the voltage excitation positive output.
A21
IEX-
Negative Current Excitation Output–This pin is connected
to the current excitation negative output.
to the current excitation negative output.
A23
IEX+
Positive Current Excitation Output–This pin is connected to
the current excitation positive output.
the current excitation positive output.
A5, A9,
No Connect–Do not connect any signal to these pins.
A25-A29
A31
RSVD
Reserved–This pin is reserved. Do not connect any signal
to this pin.
to this pin.
B32-B2
CH+(0:15)
Positive Input Channel–These pins are connected to the
positive input channels 0 through 15 respectively.
positive input channels 0 through 15 respectively.
C31-C1
CH-(0:15)
Negative Input Channel–These pins are connected to the
negative input channels 0 through 15 respectively.
negative input channels 0 through 15 respectively.