Features
4000 volts optical isolation (transient)
Built-in LED status indicator
Small footprint design
UL recognized, CSA certified, CE approved
Passes NEMA Showering Arc Test (ICS 2-230)
Meets IEEE Surge Withstand Specification (IEEE-472)
Built-in filtering for transient suppression and noise
rejection
Operating temperature: -30 °C to 70 °C

Description
Opto 22’s G4 AC input modules are used to detect on/off AC
(or DC) voltage levels. Each module provides up to 4000 volts
of optical isolation (transient) between field inputs and the
logic output of the circuit.
All AC input modules are designed with filtering on the input
and a hysteresis amplifier, providing high noise rejection and
transient-free “clean” switching.
The G4IAC5MA is a special module featuring a manual-on/
manual-off/automatic switch, ideal for diagnostic testing of
control applications.
Typical applications for G4 input modules include sensing the
presence or absence of voltage, and sensing contact closure
from sources such as proximity switches, limit switches, float
switches, selector switches, push buttons, toggle switches,
and thermostats.