SNAP Analog Input Modules

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32

Millivolt Input Module

Specifications

Part Number

Description

SNAP-AIMV2-4

Four-channel -50 to +50 mV input or

-25 mV to +25 mV input

Input Range

From -50 mV to +50 mV

From -25 mV to +25m V

Over-Range Limits

From -55 to +55 mV

(+/-50 mV range)

From -27.5 to +27.5 mV

(+/-25 mV range)

Resolution

2 microvolts (-50 mV to +50 mV)

1 microvolt (-25 mV to +25 m V)

Input Filtering

-3 dB @ 2.4Hz

Input Response Time

(% of span/delta V/delta time)

63.2%/31.5 mV/66 ms

Data Freshness (Max)

335 ms (+/- 50 mV)

668 ms (+/- 25 mV)

DC Common Mode Rejection

>-120 dB

AC Common Mode Rejection

>-120 dB @ 60 Hz

Maximum Survivable Input

±15 volts

Maximum Operating Com-

mon Mode Voltage

250 V

Accuracy at Full Scale

0.1% (50 microvolts) @ 50m V

0.2% (50 microvolts) @ 25 mV

Drift: Gain Temperature Coef-

ficient

3 microvolts / °C

Drift: Offset Temperature

Coefficient

2 microvolts / °C

Isolation

1500 V

Power Requirements

5 VDC (±0.15 ) @ 170 mA

Input Resistance - Single

Ended

100 Megohms (each channel)

Operating Temperature

0 °C to 70 °C

Storage Temperature

-40 °C to 85 °C

Wire size

22 to 14 AWG

Torque, hold-down screws

4 in-lb (0.45 N-m)

Torque, connector screws

5.26 in-lb (0.6 N-m)

Agency Approvals

UL, FM, CE, RoHS, DFARS

Warranty

Lifetime

SNAP-AIMV2-4

IMPORTANT: The mounting rack connector has 24 pins; the

module connector has 20 pins. The extra pins on the

mounting rack connector prevent misalignment of the

module during installation.

Description

The SNAP-AIMV2-4 module provides four channels of

analog to digital conversion. See the table on page 3 for I/O

processor compatibility.

Each channel on the module can be configured for -50 mV

DC to +50 mV DC or -25 mV DC to +25 mV DC.

Note that all inputs share the same reference terminal.