G4AD3 OPTO 22, G4AD3 Datasheet

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G4AD3

Manufacturer Part Number
G4AD3
Description
I/O Module
Manufacturer
OPTO 22
Type
Inputr
Datasheet

Specifications of G4AD3

Leaded Process Compatible
No
Peak Reflow Compatible (260 C)
No
Signal Input Type
4 To 20mA
No. Of Outputs
1
Resolution
12 Bits
No. Of Analog Inputs
1
No. Of Digital Outputs
1
Brand/series
G4 Series
Connection To Host
Backplane
Input
4 to 20 mA
Input Type
Analog
Input, Range
4 to 20 mA
Mounting Type
PCB
Number Of Channels
1
Primary Type
Data Acquisition
Special Features
Transformer Isolation, Optical Isolation
Voltage, Isolation
4000 VAC
Voltage, Supply
28 VDC
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
DATA SHEET
Form 426-050809
range is 4 to 20 milliamps with an under/over range capability from less than 3 milliamps to greater than 35 milliamps. One of the unique
features is that the isolated loop supply can be provided by the G4AD3. This eliminates the need for the user to provide the loop supply
(typically 15-48 V) and also saves the associated wiring, barrier strips, etc. The G4AD3 module also includes complete electrical channel-
to-channel isolation which eliminates any ground loop problems. Modules plug into an Opto 22 Modular controller or an analog I/O brick
and are secured by a captive screw. The field connections are made to the terminal strip located on the Brick base or controller I/O board.
commands “Calculate and Set Analog Offset” and “Calculate and Set Analog Gain.”
Description
The G4AD3 module provides a single channel of transformer and optically isolated current-to-digital conversion. The nominal input
NOTE: Any system using analog sensors and input modules should be calibrated annually for analog signals. To do so, use OptoControl
I/O MODULES
ANALOG INPUT
G4AD3
Number
Part
4 To 20 mA Input
Description
page 1/4
G4

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G4AD3 Summary of contents

Page 1

... One of the unique features is that the isolated loop supply can be provided by the G4AD3. This eliminates the need for the user to provide the loop supply (typically 15-48 V) and also saves the associated wiring, barrier strips, etc. The G4AD3 module also includes complete electrical channel- to-channel isolation which eliminates any ground loop problems ...

Page 2

... The module has an internal resistance of 249 Ω in series with a 3.3V zener diode not possible to use an ohm-meter to accurately measure the impedance across the field terminals of the G4AD3. This is because ohm-meters typically supply only 1 volt excitation which is not sufficient to cause current to flow through the 3.3V zener diode. Therefore, the ohm-meter will display infinite impedance (i ...

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