National Instruments VXI-SC-1102 Cold-Junction Sensor Connection

Chapter 3 Signal Connections
VXI-SC-1102/B/C User Manual 3-6
© National Instruments Corporation
Figure 3-3. Floating Signal Connection Referenced to Chassis Ground
Cold-Junction Sensor Connection
Pins A3 and A4 (CJSENSOR) connect the temperature sensor located
on the National Instruments VXI-TB Series terminal block to the
VXI-SC-1102/B/C. The CJSENSOR signal is measured relative to
CGND. Pins A3 and A4 are connected together within the
VXI-SC-1102/B/C so the position of the MTEMP/DTEMP switch on
the VXI-TB Series terminal block does not matter. The input is
overvoltage-protected to 15 VDC with the power on and off.
Caution: Exceeding the overvoltage protection on the CJSENSOR input can damage
the VXI-SC-1102/B/C submodule, the VXIbus, and the VXI-MIO board.
National Instruments is NOT liable for any damages or injuries resulting
from such signal connections.
V
s
-
+
CH0 +
Front Signal
Connector
+
-
CH0 -
+
-
CH1 +
CH1 -
VXI-SC-1102/B/C
CGND
Reference to
Chassis Ground
Floating
Signal
Make this connection to
ground reference the signal.
!