SNAP Analog Input Modules
Current Input Module, -20 mA to +20 mA, Two or Four Channels
Specifications
Part Number
Description
Input Range
Resolution
-20 mA to +20 mA
0.8 microamps
Two-channel analog current input,
-20 mA to +20 mA
SNAP-AIMA
From -22 to +22 mA
(+/-20 mA range)
Four-channel analog current input,
-20 mA to +20 mA
Over-Range Limits
SNAP-AIMA-4
Input Response Time
(% of span/ delta I/delta tme)
99.9% / 19.9 mA / 10 ms
SNAP-AIMA: 11.5 ms
SNAP-AIMA-4: 23 ms
Data Freshness (Max)
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.
DC Common Mode Rejection >-120 dB
AC Common Mode Rejection >-120 dB @ 60 Hz
Maximum Survivable Input
36 mA or 9 VDC
250 V
Maximum Operating Common
Mode Voltage
Accuracy
0.05% (10 microamps)
30 PPM/ °C
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
DRIFT: Gain Temperature
Coefficient
DRIFT: Offset Temperature
Coefficient
15 PPM/ °C
Power Requirements
5 VDC (±0.15 ) @ 170 mA
200 ohms (each channel)
Input Resistance - Single
Ended
Operating Temperature
Storage Temperature
Torque, hold-down screws
Torque, connector screws
Wire size
-20 °C to 70 °C
-40 °C to 85 °C
4 in-lb (0.45 N-m)
5.26 in-lb (0.6 N-m)
22 to 14 AWG
Opto 22 form #1182.
Agency Approvals
Warranty
UL, FM, CE, RoHS, DFARS
Lifetime
SNAP-AIMA Wiring
(Two channels)
Wiring diagrams continue
on the following page.
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com
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© 2001–2014 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.
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