Installation and Configuration
Npaq MR Hardware Manual
2.4.7. Differential Analog Input 0
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 2-17:
Differential Analog Input 0 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 2-18:
Differential Analog Input 0 Pin Assignment
Pin#
Description
In/Out/Bi
8
Analog Input 0 -
Input
19
Analog Input 0 +
Input
21
Signal Common for Encoder
N/A
Signal
Source
Shielded
Cable
ANALOG IN+
PIN-19
100
100
.1
64.9K
64.9K
16.2K
16.2K
OP279
.001
.001
ANALOG IN-
PIN-8
GND
PIN-21
Figure 2-23:
Analog Input 0
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