Installation and Configuration
Npaq MR Hardware Manual
2.5.1. Analog Input 1
Analog inputs use an internal instrumentation amplifier. To interface to a single-ended (non-differential)
voltage source, connect the signal common of the source to the negative input and the analog source signal
to the positive input. A floating signal source should be referenced to the analog common as shown in
.
Table 2-20:
Analog Input 1 Specifications
Specification
MP Drive Value
ML Drive Value
(AI+) - (AI-)
+10 V to -10 V
+10 V to -10 V
Input Impedance
1 MΩ each input to ground
1 MΩ each input to ground
Resolution (bits)
12 bits
16 bits
Resolution (volts)
4.88 mV
305 µV
Table 2-21:
Analog Inputs Connector Pin Assignment
Pin#
Description
In/Out/Bi
1
Non-Inverting Analog Input 1+
Input
2
InvertingAnalog Input 1-
Input
15
Ground
N/A
Signal
Source
Shielded
Cable
ANALOG IN1+
PIN-1
100
100
.1
64.9K
64.9K
ANALOG IN1-
PIN-2
GND
PIN-15
16.2K
OP279
.001
10
Figure 2-24:
Analog Input 1
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