900G03-0202 Honeywell 120-240V AC Input Module

Honeywell 900G03-0202 AC Digital Input Module

The 900G03-0202 is a 16-channel AC Digital Input module for the Honeywell HC900 controller. It is designed to interface directly with 120V or 240V AC field devices for status monitoring and interlocking.

Core Technical Specifications

• Brand: Honeywell
• Model Number: 900G03-0202
• Product Type: Digital Input (DI) Module, AC Voltage
• Inputs per Module: 16 Channels (Sinking Type)
• Input Voltage Range: 80 VAC to 264 VAC
• Peak Voltage Rating: 264 VAC
• AC Frequency Range: 47 Hz to 63 Hz
• Galvanic Isolation: 2 Groups of 8 Inputs (350V AC Maximum between groups)
• ON Voltage Level: 75 VAC (Minimum to register ON state)
• OFF Voltage Level: 20 VAC (Maximum to register OFF state)
• Input Impedance: 48 kΩ Nominal
• Input Current (@120V AC, 60Hz): 1 mA Nominal
• Input Current (@230V AC, 50Hz): 2 mA Nominal
• Minimum ON Current: 0.3 mA
• Maximum OFF Current: 0.2 mA
• OFF to ON Response Time: 4 ms + 1.5 Line Cycles Maximum
• ON to OFF Response Time: 4 ms + 2 Line Cycles Maximum
• Power Supply: Externally Powered from Field Voltage
• Common Terminals: 2 (One per group of 8 inputs)
• Channel Status Indicator: Green LED per Channel (Illuminates when input is ON)
• Module Status LED: Green Blinking (Active Scan), Red (Fault/Diagnostic)
• Logic Inversion: Supported in Controller Software
• Operating Temperature: 0°C to +60°C (Standard HC900 Range)

Module Features & Design

• Accepts a wide AC input range (80-264V AC) for global compatibility with 120V and 240V systems.
• Two isolated groups (8 channels each) allow connection to two different AC voltage sources or phases.
• High input impedance (48kΩ) minimizes loading on the sensed circuit.
• Fast response time ensures accurate detection of contact status changes.
• Individual green LED per channel provides instant visual confirmation of input state.
• Designed as a sinking input module; AC voltage is applied between the input terminal and the common terminal.
• Controller logic allows software inversion of the input state if needed (e.g., for normally closed contacts).

Installation & Wiring Guidelines

• Install in a compatible Honeywell HC900 rack. This module is externally powered by the field AC voltage.
• Connect the AC source common/neutral to one of the two common terminals on the module.
• Connect the switched AC hot wire to the desired input terminal.
• Wire channels 1-8 to one common and channels 9-16 to the other common to utilize the isolation groups.
• Ensure field wiring complies with local electrical codes for the voltage level used.
• Use appropriate wire gauges and consider inrush currents from inductive loads (e.g., contactor coils).
• Configure input filtering or debounce logic in the HC900 controller if necessary for noisy signals.

Typical Applications

• Monitoring status of motor starters, contactors, and circuit breakers.
• Reading level or pressure switch positions in HVAC and industrial processes.
• Interfacing with safety interlocks and manual control stations.
• General-purpose AC status monitoring in control panels.

For wiring diagrams or to order the Honeywell 900G03-0202, contact our technical support.

Contact: Email sales@nex-auto.com or WhatsApp +86 153 9242 9628.

Partner: NexAuto Technology Limited

© 2026 AutoNex Controls Limited. All rights reserved.