(USA and Canada only)
The SNAP-AIMA provides two channels of -20 mA to +20 mA analog current input. The module does not supply loop excitation current. Although the two channels are not isolated from each other, the module is transformer isolated and optically isolated from other modules and devices.
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.
For a similar module that provides two isolated channels, see SNAP-AIMA-i.
For a module that provides two isolated channels and supplies loop excitation, see SNAP-AIMA-iSRC.
For SNAP PAC brains and rack-mounted controllers, we also have a four-channel module, the SNAP-AIMA-4, and a 32-channel module, the SNAP-AIMA-32.
Build your system in the SNAP I/O Configurator.
-20 mA to +20 mA
From -22 to +22 mA
(+/-20 mA range)
Input Response Time
(% of span/ delta I/delta tme)
99.9% / 19.9 mA / 10 ms
Data Freshness (Max)
SNAP-AIMA: 11.5 ms
SNAP-AIMA-4: 23 ms
DC Common Mode Rejection
AC Common Mode Rejection
>-120 dB @ 60 Hz
Maximum Survivable Input
36 mA or 9 VDC
Maximum Operating Common Mode Voltage
0.05% (10 microamps)
DRIFT: Gain Temperature Coefficient
30 PPM/ °C
DRIFT: Offset Temperature Coefficient
15 PPM/ °C
5 VDC (±0.15 ) @ 170 mA
Input Resistance - Single Ended
200 ohms (each channel)
-20 °C to 70 °C
-40 °C to 85 °C
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)
22 to 14 AWG
UL, FM, CE, RoHS, DFARS; UKCA, NEBS
This document lists and describes all current Opto 22 SNAP PAC System part numbers, including PAC Project software, SNAP PAC controllers, and SNAP I/O modules of all kinds. SNAP PAC mounting racks and SNAP power supplies are also listed.
SNAP I/O analog input modules are part of Opto 22's SNAP PAC System. This document includes descriptions, specifications, and wiring and dimensional diagrams for the following analog input modules:
This document is the Manufacturer's Declaration of Conformity for the products listed herein, in accordance with the rules, regulations and standards of the United Kingdom. The models cited have been tested to the essential requirements listed in the Standards section, and fully comply with the legislation as listed in UK Legislation section.
This document is the Manufacturer's Declaration of Conformity for the products listed herein, in accordance with European, international, and/or national standards and regulations.
Claremont, California-based New Bedford Panoramex Corporation (NBP) specializes in designing and developing air traffic control systems and lighting systems used in the aerospace and aviation industry. An examination of some of NBP’s most widely deployed lighting control systems finds that their key components are programmable automation controllers and intelligent I/O systems from Opto 22.
Among other things, the hardware provides the interface and intelligence used to sequence runway lights and adjust their intensity to provide guidance to pilots. For some of these systems, an Opto 22 SNAP PAC programmable automation controller replaces an embedded single-board controller that took five times as long to program (using “C” code) than the flowchart-based programming used for the SNAP PAC.
At the University of California, Irvine, Scientist Dr. John Garman and a team of his engineering students use an Opto 22 SNAP PAC System in their research of coal and biomass combustion. The SNAP PAC hardware controls the coal feed rate into an entrained flow reactor, monitors thermocouples that feed back process control data, monitors emissions, and acquires and logs data on operating conditions within the reactor.
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.
This document lists all Opto 22 part numbers that have Factory Mutual (FM) approval.
This document lists all Opto 22 part numbers that have the Underwriters Laboratory (UL) approval.
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.
This CAD file includes drawings that apply to most SNAP analog and digital I/O modules.
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.
Verifying the voltage level at the I/O rack is very important for equipment safety and point value accuracy. This is the proper technique for reading the voltage level at the rack.
A quick overview on securing a SNAP Module to a SNAP rack.
A quick overview on removing a SNAP module.
What's the difference between accuracy and resolution in analog I/O specifications? Try your own specs in the calculator.