SNAP Analog Input Modules

Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com

SALES 800-321-6786 • 951-695-3000 • FAX 951-695-3095 • sales@opto22.com • SUPPORT 800-835-6786 • 951-695-3080 • FAX 951-695-3017 • support@opto22.com

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Current Input Module, -20 mA to +20 mA, Two or Four Channels

Specifications

Description

The SNAP-AIMA and SNAP-AIMA-4 modules provide an input

range of -20mA to +20mA. The SNAP-AIMA has two channels,

and the SNAP-AIMA-4 has four. If you need a similar module

with more channels, see page 9. Check the table on page 3 for

I/O processor compatibility. These modules DO NOT supply

loop excitation current.

Since all inputs share a common

reference, the module must be

installed at the beginning or end

of a typical 4–20mA loop. If you

are using both standard and self-

sourcing transmitters, either put

the transmitters on different

modules or use different power

supplies. If you need channels

that are isolated from each other

on the same module, see

Opto 22 form #1182.

Input Range

-20 mA to +20 mA

Resolution

0.8 microamps

Over-Range Limits

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

>-120 dB

AC Common Mode Rejection

>-120 dB @ 60 Hz

Maximum Survivable Input

36 mA or 9 VDC

Maximum Operating Common

Mode Voltage

250 V

Accuracy

0.05% (10 microamps)

DRIFT: Gain Temperature

Coefficient

30 PPM/ °C

DRIFT: Offset Temperature

Coefficient

15 PPM/ °C

Power Requirements

5 VDC (±0.15 ) @ 170 mA

Input Resistance - Single

Ended

200 ohms (each channel)

Operating Temperature

-20 °C to 70 °C

Storage Temperature

-40 °C to 85 °C

Torque, hold-down screws

4 in-lb (0.45 N-m)

Torque, connector screws

5.26 in-lb (0.6 N-m)

Wire size

22 to 14 AWG

Agency Approvals

UL, FM, CE, RoHS, DFARS

Warranty

Lifetime

Part Number

Description

SNAP-AIMA

Two-channel analog current input,

-20 mA to +20 mA

SNAP-AIMA-4

Four-channel analog current input,

-20 mA to +20 mA

SNAP-AIMA Wiring

(Two channels)

Wiring diagrams continue

on the following page.