SNAP Analog Input Modules
Current Input Module, -20 mA to +20 mA, Eight Channels
Part Number
Description
SNAP-AIMA-8
Current Source
Eight-channel analog current input,
-20 mA to +20 mA
SNAP-AIMA-8
NOTE: Terminals 2, 4, 6, and 8 on both
connectors are connected internally.
4-20 self-powered (self-
sourcing) transmitters
Specifications
Input Range
-20 mA to +20 mA
T
T
T
T
From -22 to +22 mA
(+/-20 mA range)
Over-Range Limits
Resolution
CH 0
CH 1
CH 2
CH 3
2
3
4
5
6
7
8
0.8 microamps
Data Freshness (Max)
0.28 seconds
DC Common Mode Rejection >-120 dB
OR
AC Common Mode Rejection >-120 dB @ 60 Hz
Maximum Survivable Input
36 mA or 9 VDC
250 V
8
7
6
5
4
3
2
Maximum Operating Common
Mode Voltage
1
8
CH 7
7
6
CH 6
5
4
3
CH 5
2
1
CH 4
T
Accuracy
0.05% (10 microamps)
30 PPM/ °C
T
T
T
DRIFT: Gain Temperature
Coefficient
DRIFT: Offset Temperature
Coefficient
External loop
power supply
15 PPM/ °C
Isolation
1500 V
NOTE: For transmitters sharing the plus side of the loop power
supply, the input current will be read as a positive current.
Power Requirements
5 VDC (±0.15 ) @ 170 mA
Input Resistance - Single
Ended
100 ohms (all channels share
the same reference point)
See additional wiring diagrams on page 7.
Operating Temperature
Storage Temperature
Torque, hold-down screws
Torque, connector screws
Agency Approvals
0 °C to 70 °C
-40 °C to 85 °C
4 in-lb (0.45 N-m)
1.7 in-lb (0.19 N-m)
CE, RoHS, DFARS
Lifetime
Description
The SNAP-AIMA-8 module provides an input range of -20mA
to +20mA with eight channels of analog current input. (If you
need a similar module with 32 channels, see page 9.) The
SNAP-AIMA-8 can be used with SNAP PAC brains and rack-
mounted controllers only. These modules DO NOT supply
loop excitation current.
Warranty
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.
If you have multiple self-sourcing transmitters that share the
same positive common, do not use this module. Use the
SNAP-AIMA-i module instead. See Opto 22 form #1182.
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com
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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
© 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.
E-OEC [ OPTO ELECTRONICS CO,. LTD ]
