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Availability: Obsolete
OBSOLETE SNAP Isolated 2-Ch 0-10 amp RMS Analog Input Module

Production Specification

*** NOTE: This part is OBSOLETE and no longer available. ***
Please consider SNAP-AIARMS-i or contact Opto 22 Pre-Sales engineers for more information. 

The SNAP-AIARMS-i-FM module provides two isolated channels with an input range of 0 to 10 amps RMS AC/DC. An ideal input is the 5-amp secondary of a standard current transformer used to monitor AC line current. The module may also be used to monitor AC current to greater than a 100-amp range, using a current transformer of suitable ratio.

The two channels are isolated from each other; they do not share any field connection. The SNAP-AIARMS-i-FM module is an excellent choice for differential current measurements.

If you do not need channel-to-channel isolation, see SNAP-AIARMS.

Part of the SNAP PAC System, the module mounts on a SNAP PAC rack with a SNAP PAC brain or rack-mounted controller. Analog, digital, and serial I/O modules can all be on the same rack. Such an I/O unit is also well suited for PC-based control or for use as intelligent remote I/O for an Allen-Bradley Logix PLC system, such as ControlLogix, MicroLogix, or CompactLogix.

Build your system in the SNAP I/O Configurator.
*** NOTE: This part is OBSOLETE and no longer available. ***

Input Range

0 to 10 amp RMS AC/DC

Input Over Range

To 11 amps

Input Resistance

0.005 ohms

Maximum Input

11 amps AC/DC

Accuracy (AC)

±8 mA and ±0.2% reading


400 µA

DC Reversal

±16 mA (0.16%)

Input Response Time
(Step Change)

63.2% (6.32 A) in 50 ms
99% (9.92 A) in 75 ms

Data Freshness (Max)

0.025 ms

DC Common Mode Rejection

>-120 dB

AC Common Mode Rejection

>-120 dB at 60 Hz

Maximum Operating
  Voltage Between Channels
  Common Mode Voltage


250 V
250 V

Isolation: Optical

4000 V

Isolation: Transformer

1500 V

Isolation: Channel to Channel

250 V continuous
(1500 V transient)

Power Requirements

5 VDC (±0.15 V) at 200 mA

Ambient Temperature:


-20 °C to 70 °C
-25 °C to 85 °C


5-95%, non-condensing

Torque, hold-down screws

Not to exceed 1 in-lb (0.11 N-m)

Torque, connector screws

5.22 in-lb (0.59 N-m)

Agency Approvals




Obsolete SNAP Analog I/O Modules Technical Note

This technical note contains information you may need about OBSOLETE SNAP analog I/O modules you’re still
using. Included are part numbers, descriptions, specifications, wiring diagrams, and dimensional drawings.
These parts have been removed from data sheets because we no longer sell them.

This document includes information on the following obsolete SNAP analog I/O modules:

Opto 22 RoHS 3 Statement of Compliance - Restriction of Hazardous Substances

This document is a statement of compliance with the EU Directive 2015/863/EU, Restriction of Hazardous Substances (RoHS 3). This document lists Opto 22 products that comply with the substance restrictions of the RoHS 3 directive.

CE Declaration: Low Voltage

This document is the Manufacturer's Declaration for the listed products as mentioned in the attachment - to which this confirmation refers - that they are in accordance with the mentioned European, international and/or national standards and regulations.

No downloads are available for this product.

Video: SNAP PAC System Overview

This overview describes the four integrated components of the SNAP PAC system: software, controllers, brains and I/O. This hardware and software system is designed for industrial control, remote monitoring and data acquisition.

Video: Securing SNAP Module

A quick overview on securing a SNAP Module to a SNAP rack.

Video: Removing a SNAP Module

A quick overview on removing a SNAP module.

Accuracy vs Resolution

What's the difference between accuracy and resolution in analog I/O specifications? Try your own specs in the calculator.