(USA and Canada only)
G4 I/O family
The G4IDC24 is a digital DC input module with an input voltage range of 10-32 VDC (or 12-32 VAC), requiring a typical logic voltage of 24 VDC. This module is not compatible with Opto 22 brains.
This module is designed with filtering on the input and a hysteresis amplifier, providing high noise rejection and transient-free, "clean" switching.
Opto 22’s G4 DC input modules are used to detect on/off DC voltage levels. Each module provides up to 4000 volts (transient) of optical isolation between field inputs and the logic output of the circuit. Typical applications for DC input modules include sensing the presence or absence of voltage and sensing contact closure from sources such as proximity switches, limit switches, selector switches, push buttons, photoelectric switches, and TTL-compatible devices.
Input voltage range
Input current at maximum line
Isolation, input-to-output (transient):
Input allowed for off-state
Nominal output supply voltage
Output supply voltage range
Output supply current at
nominal logic voltage
Input resistance (R1 in schematic)
Control resistance (Rc in schematic)
Output voltage drop
V @ 50 mA
Output current (sinking)
Output leakage with no input
microamps @ 30 VDC
–30 to +70
–30 to +85
* Compatible with Raspberry Pi.
** Not for use with Opto 22 brains.
*** At 5Vp-p square wave input, 50% duty cycle.
Opto 22’s G4 DC input modules are used to detect on/off DC voltage levels.
The G4 Digital I/O Data Book provides complete details on every G4 digital I/O product component, including adapter cards, I/O modules, and mounting racks.
This document is the Manufacturer's Declaration of Conformity for the products listed herein, in accordance with the rules, regulations and standards of the United Kingdom. The models cited have been tested to the essential requirements listed in the Standards section, and fully comply with the legislation as listed in UK Legislation section.
This document is the Manufacturer's Declaration of Conformity for the products listed herein, in accordance with European, international, and/or national standards and regulations.
This document is a statement of compliance with the EU Directive 2015/863/EU, Restriction of Hazardous Substances (RoHS 3). This document lists Opto 22 products that comply with the substance restrictions of the RoHS 3 directive.
Wiring diagrams for G4 modules and racks
This document lists all Opto 22 part numbers that have the Canadian Standards Association (CSA) approval.
This document lists all Opto 22 part numbers that have the Underwriters Laboratory (UL) approval.
This document is the Manufacturer's Declaration for the listed products as mentioned in the attachment - to which this confirmation refers - that they are in accordance with the mentioned European, international and/or national standards and regulations.