G4AD3 OPTO 22, G4AD3 Datasheet
G4AD3
Specifications of G4AD3
Related parts for G4AD3
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 ...