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SNAP-AIRATE

Part # SNAP-AIRATE
Description I/O MODULE, Current Rating:-,Accessory Type:Rate Input Mo
Category MODULE
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Technical Document


DISCLAIMER: The information provided herein is solely for informational purposes. Customers must be aware of the suitability of this product for their application, and consider that variable factors such as Manufacturer, Product Category, Date Codes, Pictures and Descriptions may differ from available inventory.

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
© 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.
PAGE
1
DATA SHEET
Form 1065-140815
SNAP Analog Input Modules
Features
Resolution = 0.004% of nominal range
Two, 4, 8, or 32 single-ended inputs per module
Out-of-range indication
Factory calibrated; no user adjustment necessary
Description
SNAP I/O analog input modules are part of
Opto 22’s SNAP PAC System. All of these
modules mount on a SNAP PAC rack with a
SNAP PAC brain or R-series controller, either
a standard wired model or a
Wired+Wireless
model.
A minimum number of SNAP module types
support a full range of analog input
requirements. These software-configurable
modules handle a wide variety of signal
levels. They provide high resolution (0.004%
of nominal range) for precise signal levels, as
well as multiple-channel packaging. All
SNAP analog modules are factory calibrated
and individually tested. Part numbers
ending in -FM are Factory Mutual approved.
SNAP analog input modules have an on-
board microprocessor to provide module-
level intelligence, which makes them an
ideal choice for Original Equipment
Manufacturers (OEMs). For additional
information about the standalone operation
of SNAP analog modules, see Opto 22 form
#0876, SNAP I/O Module Integration Guide.
Notes for legacy hardware: Some of these
modules also work with older Opto 22 I/O
processors (brains or on-the-rack
controllers) and M-series or B-series racks. To
check processor compatibility, see the table
on page 3.
Specifications begin on page 4. For
dimensional drawings, see pages 3545.
IMPORTANT: Any system using analog
sensors and input modules should be
calibrated annually for analog signals. For
I/O units on a SNAP PAC System, use the PAC
Control
commands “Calculate and Set
Offset” and “Calculate and Set Gain.” For
other Ethernet-based I/O units, you can also
SNAP Analog Input Modules
Part Number
Part Description
See
page
SNAP-AIARMS 2-channel 0 to 10 amp RMS AC/DC input 4
SNAP-AIMA 2-channel analog current input, -20 to +20 mA 6
SNAP-AIMA-4 4-channel analog current input -20 to +20 mA 6
SNAP-AIMA-8 8-channel analog current input -20 to +20 mA 8
SNAP-AIMA-32
SNAP-AIMA-32-FM*
32-channel analog current input -20 to +20 mA 9
SNAP-AIRATE 2-channel 0–25,000 Hz analog rate input 11
SNAP-AIR40K-4
4-channel analog resistor/thermistor input, 40 K Ohms,
20 K Ohms, 10 K Ohms, or 5 K Ohms
13
SNAP-AIR400K-8
8-channel analog resistor/thermistor input, 400 K Ohms
14
SNAP-AIRTD-1K 2-channel 1000 ohm platinum RTD input 18
SNAP-AIRTD 2-channel 100 ohm platinum RTD input 18
SNAP-AIRTD-10 2-channel 10 ohm copper RTD input 18
SNAP-AICTD 2-channel analog temperature input, ICTD 20
SNAP-AICTD-4 4-channel analog temperature input, ICTD 20
SNAP-AICTD-8 8-channel analog temperature input, ICTD 22
SNAP-AITM
2-channel analog type E, J, or K thermocouple or -150
to +150 mV input or -75 to +75 mV input
23
SNAP-AITM-2
2-channel analog type B, C, D, G, N, T, R, or S thermo-
couple or -50 to +50 mV DC or -25 to +25 mV DC input
24
SNAP-AITM-8
SNAP-AITM-8-FM*
8-channel B, C, D, E, G, J, K, N, R, S, or T thermocou-
ple or -75 to +75 mV, -50 to +50 mV, or -25 to +25 mV
input
25
SNAP-AIVRMS 2-channel 0 to 250 V RMS AC/DC input 26
SNAP-AIV
2-channel analog voltage input -10 to +10 VDC or -5 to
+5 VDC
27
SNAP-AIV-4
4-channel analog voltage input -10 to +10 VDC or -5 to
+5 VDC
27
SNAP-AIV-8
8-channel analog voltage input -10 to +10 VDC or -5 to
+5 VDC
29
SNAP-AIV-32
SNAP-AIV-32-FM*
32-channel analog voltage input -10 to +10 VDC or -5
to +5 VDC
30
SNAP-AIMV2-4 4-channel -50 to +50 mV input or -25 to +25 mV input 32
SNAP-AIMV-4
4-channel -150 to +150 mV input or -75 to +75 mV
input
33
* Factory Mutual approved
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
© 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.
SNAP Analog Input Modules
PAGE
2
DATA SHEET
Form 1065-140815
use PAC Manager
software to calculate and set offset and
gain.
Isolation
All SNAP analog input modules are isolated from all other
modules and from the SNAP I/O processor. The modules in
this data sheet do not have channel-to-channel isolation,
however. (If you need isolated analog modules, see Opto 22
form #1182.)
Transformer isolation prevents ground loop currents from
flowing between field devices and causing noise that
produces erroneous readings. Ground loop currents are
caused when two grounded field devices share a connection,
and the ground potential at each device is different.
Isolation also protects sensitive control electronics from
industrial field signals.
IMPORTANT: Since these analog input modules provide
multiple single-ended input channels with a common
reference, the channels are not isolated from each other. (See
Opto 22 form #1182 for isolated modules.)
Bipolar and Unipolar Input Modules
Most SNAP analog input modules are considered to be
bipolar, which means the range extends equal amounts above
and below zero. An example of this is the SNAP-AIV module,
which has a range of -10 to +10 VDC.
Some modules are considered unipolar, which means the
range starts or ends at zero. For example, the SNAP-AIVRMS
module has a range of 0 to 250 VAC because AC current
cannot be negative.
Nominal Range and Over-range Limits
All SNAP analog input modules have a nominal range for the
field signal and most support a 10% over-range limit. The
nominal range is the normal range of the field signal for the
module or point configuration. The over-range limit is the
maximum valid field signal the module or point configuration
can read outside of the nominal range. For example, the over-
range limits for the SNAP-AIV are -11 and +11 VDC, and for the
SNAP-AIVRMS, the over-range limit is 275 VAC.
Some modules or point configurations do not support field
signals outside of the nominal range. For example, points
configured as temperature inputs (thermocouple, RTD, ICTD)
do not support over-range readings.
When the field signal is outside of the over-range limits of the
module, the brain will not be able to determine if the value is
too high or too low, so it will return an "out of range" value of -
32768.0
Over-range limits only apply to input modules. Output
modules are limited to their nominal ranges.
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
© 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.
SNAP Analog Input Modules
DATA SHEET
Form 1065-140815
PAGE
3
Installation
Note module and processor compatibility in the following
table:
All modules can be used with SNAP PAC rac ks and can be
placed in any position on the rack. Two- and four-channel
modules (except the SNAP-AIRTD-10 and SNAP-AIRTD-1K) can
also be used with legacy SNAP M-series and B-series
mounting racks. (For more information on using legacy
hardware, see form #1688, the SNAP PAC System Migration
Technical Note.)
Modules snap securely into place in the row of connectors on
the mounting rack. Each module connector has a number.
Analog input modules and other types of SNAP I/O modules
are mounted on the module connectors starting at module
position zero.
Modules require a special tool (provided) for removal.
The following diagram shows part of a SNAP PAC mounting
rack.
1. Place the rack so that the module connector numbers
are right-side up, with zero on the left, as shown in the
diagram above. (If your rack has screw connectors, the
screw connectors will be at the bottom.)
2. Position the module over the module connector,
aligning the small slot at the base of the module with
the retention bar on the rack. When positioning modules
next to each other, be sure to align the male and female
module keys at the tops of the modules before snapping
a module into position.
3. With the module correctly aligned, push on the module
to snap it into place.
4. (Optional) Use standard 4-40 x 1/4 truss-head Phillips
hold-down screws to secure both sides of each module.
CAUTION: Do not over-tighten screws.
5. Follow the wiring diagrams beginning on page 4 to
attach modules to the devices they monitor. Most
modules accept 22 to 14 AWG wire; the SNAP-AITM-8
accepts a maximum of two solid 18 AWG wires.
For faster, easier field wiring installation and maintenance,
use SNAP TEX cables and breakout boards. See Opto 22 form
#1756, the SNAP TEX Cables & Breakout Boards Data Sheet, for
compatibility and specifications.
Modules Compatible I/O Processors
32-channel inputs
8-channel inputs
SNAP-AIRTD-10
SNAP-AIRTD-1K
SNAP PAC R-series controllers and
SNAP PAC brains, including Wired+Wire-
less models
4-channel inputs
SNAP PAC R-series controllers and
SNAP PAC brains, including Wired+Wire-
less models
Also the following legacy brains:
SNAP Ethernet, SNAP Simple, SNAP
Ultimate; SNAP-DNP-ASDS; SNAP OEM
2-channel inputs
(except SNAP-
AIRTD-10 and
SNAP-AIRTD-1K)
SNAP PAC R-series controllers and
SNAP PAC brains, including Wired+Wire-
less models
Also the following legacy brains:
SNAP Ethernet, SNAP Simple, SNAP
Ultimate; SNAP-DNP-ASDS; SNAP OEM;
serial SNAP brains (B3000, Modbus, Pro-
fibus); B3000-HA; B6
Module
position zero
Module connectors
Processor
connector
Retention bar
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