National Instruments Module SCXI-1503 Manuel d'utilisateur télécharger pdf (Page 32)

Chapter 4 Theory of Operation

SCXI-1503 User Manual 4-2 ni.com

Figure 4-1. Block Diagram of SCXI-1503

AI 15 +

AI 15 –

Calibration

Source

SCXIbus

Interface

CJSENSOR

Front Signal Connector

Rear Signal Connector

32-to-1 Mux

Input Protection

and Lowpass Filter

Switch

Switch

Switch Mux

Inst.

Amp

+

–

AI 0 +

AI 0 –

AI 0 +

AI 0 –

Lowpass

Filter

Buffer Buffer

Inst.

Amp

+

–

Gain 31

Gain 0

Lowpass

Filter

Gain Select

Digital Interface

and Control

Buffer

Buffer

Mux

Calibration EEPROM

Input Select

OUT REF

AI GND

AB 0 +

AB 0 –

SCXIbus Connector

100 µA

IEX 15 –

IEX 15 +

100 µA

IEX 0 –

IEX 0 +

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