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SCXI-1303 Installation Guide

6

©

 National Instruments Corporation

Figure 2.  

Resistor Connections

Table 1 shows the relationship between the channel input signals and the 
resistor networks.

Table 2 shows which resistor networks to use for your SCXI module, signal 
type, and application.

Table 1.  

Channel Input Signals and Resistor Networks

Channel

Pullup Resistor 

Network

Bias Resistor Network

0–7

RP5

RP1

8–15

RP6

RP2

16–23

RP7

RP3

24–31

RP8

RP4

CH+

CH-

CH+

CH-

SCXI Module

R

pullup

(RP5, RP6, RP7, RP8)
(in sockets)

R

bias

(RP1, RP2, RP3, RP4)
(in sockets)

Screw Terminals

+5 V

Summary of Contents for SCXI-1303

Page 1: ...rature gradients across the screw terminals when you measure with thermocouples The terminal block has 78 screw terminals for easy connection Thirty two pairs of screw terminals connect to the 32 diff...

Page 2: ...se numbers The 10 resistor network is labeled 100 10 100 the 10 M resistor network is labeled 106 10 106 Figure 1 shows examples of these resistors Figure 1 Resistor Networks Open Thermocouple Detecti...

Page 3: ...M 10 pin bused configuration resistor network not supplied and have a sample rate of 20 kHz interchannel delay of 50 s typical With a 10 bias resistor network the current leakage would be 5 A 5 V 1 M...

Page 4: ...offset Temperature Sensor Output and Accuracy The SCXI 1303 temperature sensor outputs 1 91 to 0 58 V from 0 to 55 C and has an accuracy of 0 5 C over the 15 to 35 C range and 0 9 C over the 0 to 15 a...

Page 5: ...MPOUT signal Therefore use an average of a large number of samples to obtain the most accurate measurement Noisy environments require more samples for greater accuracy Configuring the Resistor Network...

Page 6: ...networks Table 2 shows which resistor networks to use for your SCXI module signal type and application Table 1 Channel Input Signals and Resistor Networks Channel Pullup Resistor Network Bias Resisto...

Page 7: ...d remove the cover 2 Loosen the strain relief screws and remove the strain relief bar 3 Run the signal wires through the strain relief opening You can add insulation or padding if necessary 4 Prepare...

Page 8: ...earth ground to the earth ground solder lug 8 Reinstall the strain relief bar and tighten the strain relief screws 9 Reinstall the top cover and tighten the top cover screws 10 Connect the terminal bl...

Page 9: ...eps 1 Connect the module front connector to its mating connector on the terminal block 2 Tighten the top and bottom thumbscrews on the back of the terminal block to hold it securely in place Note For...

Page 10: ...from 15 to 35 C Output 1 91 to 0 58 V from 0 to 55 C Temperature Sensor Circuit Diagram The circuit diagram in Figure 5 provides optional details about the SCXI 1303 temperature sensor Figure 5 Tempe...

Page 11: ......

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