G4 Analog ICTD Input
Features
Small size, rugged packaging
Optical & transformer isolation, 4000 Vrms transient
Runs on a single 24 VDC supply
Factory-calibrated, no user adjustment necessary
12-bit Resolution
Operating temperature 0° to 70° C
Description
The G4AD4 module works in conjunction with a standard
ICTD temperature probe and provides a single channel of
optically-isolated temperature-to-digital conversion.
Modules plug into an Opto 22 modular controller or an analog
I/O brick and are secured by a captive screw. Field connections
are made to the terminal strip located on the brick base or
controller I/O board.
The G4AD4 module includes complete electrical channel-tochannel isolation, which eliminates troublesome ground loop
G4 Analog ICTD Input
G4AD4
problems. The ICTD can be used in energy management,
freezer control, and similar applications.
The G4AD4 module is compatible with industry-standard
ICTDs as well as Opto 22’s ICTD temperature probes. See form
2072, the ICTD Temperature Probes Data Sheet.
NOTE: Any system using analog sensors and input modules should
be calibrated annually for analog signals. To do so, use
OptoControl commands “Calculate and Set Analog Offset” and
“Calculate and Set Analog Gain.”
Specifications
Input Temperature Range
G4AD4
ICTD Probe
Input response time
Output accuracy* ±0.8 °C
Resolution 12 bits
Thermal time constant (ICTD) 2.5 minutes typical (still air)
Cable length > 2,000 feet (610 meters)
Isolation(Transient)
Input-to-output
Input-to-analog supply
Module Ambient Temperature
Operating
Storage
*Accuracy figure requires use of gain and offset commands.
-188.4 °C to 150 °C
- 40 °C to 100 °C
5% full scale step change in 7.8 seconds
63% full scale step change in 150 seconds
4,000 Vrms
4,000 Vrms
-30 °C to 70 °C
-40 °C to 85 °C
Part Numbers
Part Description
G4AD4 ICTD Temperature Input
DATA SHEET
Form 0429-130501
© 1991–2013 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.
PAG E
1
Connections
G4 Analog ICTD Input
G4 Analog ICTD Input
DATA SHEET
PAG E
2
Form 0429-130501
© 1991–2013 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 respecti ve companies or organizations.
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SNAP PACs are based on open Ethernet and Internet Protocol
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PAC P ro j e c t Softwa re Su i t e
Opto 22’s PAC Project Software Suite provides full-featured,
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database connectivity software for your SNAP PAC System.
Control programming includes both easy-to-learn flowcharts
and optional scripting. Commands are in plain English;
variables and I/O point names are fully descriptive.
PAC Project Basic offers control and HMI tools and is free for
download on our website, PAC Project
Professional, available for separate purchase, adds one
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Software Suite
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SoftPAC, OptoOPCServer, OptoDataLink, options for controller
redundancy or segmented networking, and support for legacy
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While SNAP PAC controllers provide central control and data
distribution, SNAP PAC brains provide distributed intelligence
for I/O processing and communications. Brains offer analog,
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SNAP I/O
I/O provides the local connection to sensors and equipment.
Opto 22 SNAP I/O offers 1 to 32 points of reliable I/O per
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I/O units.
Analog, digital, and serial modules are all
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controlled by the same processor (SNAP
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Quality
Founded in 1974, Opto 22 has established a
worldwide reputation for high-quality
products. All are made in the U.S.A. at our
manufacturing facility in Temecula,
California. Because we test each product
twice before it leaves our factory, rather
than only testing a sample of each batch,
we can guarantee most solid-state relays
and optically isolated I/O modules for life.
compre
hensive technical support for Opto 22 products. Our
staff of support engineers represents decades of training and
experience. Support is
Additional support is always available on our website: how-to
videos, OptoKnowledgeBase, self-training guide,
troubleshooting and user’s guides, and OptoForums.
In addition, hands-on training is available for free at our
contac
t Opto 22 headquarters at
or 951-695-3000, or visit our website at
© 2013 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.
Form 1335-121210
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