Honeywell 900A01-0202 Universal Analog Input Module

Honeywell 900A01-0202 Universal Analog Input Module

The 900A01-0202 is a high-precision Universal Analog Input module for the Honeywell HC900 control system. It provides 8 configurable input channels with advanced diagnostics for critical process measurement.

Core Technical Specifications

• Brand: Honeywell
• Model Number: 900A01-0202
• Product Type: Universal Analog Input (AI) Module
• Inputs per Module: 8 Channels (Individually Isolated)
• Supported Input Types: mV, V, Thermocouple (T/C), RTD, Ohms, mA
• Input Impedance: 10 MΩ (T/C, mV), >1 MΩ (Volts), 250 Ω (mA)
• Galvanic Isolation: 400 VDC (Point-to-Point), 1 kVDC (to Logic)
• A/D Converter: 15-Bit Resolution (One per Module)
• Update Rate: 500 ms (per module)
• Factory Calibration Accuracy: ± 0.1% of Range (Standard)
• Temperature Effect on Accuracy: ± 0.01% of Full Scale per °C max
• Long-Term Stability: 0.1% per Year
• Reference Junction Accuracy: ± 0.7 °C
• Noise Rejection (Series Mode): > 60 dB
• Noise Rejection (Common Mode): > 130 dB @ 120V AC
• Burnout Detection: Configurable (Upscale, Downscale, Defined Value, None)
• Over-Range Limit: ±10% (Linear Ranges), ±1% (Non-linear Ranges)
• T/C Break Detection: Via Current Pulse
• Faulty Thermocouple Warning: Triggered if Impedance > 100 Ω
• Operating Temperature: 0°C to +60°C (HC900 System Standard)
• Storage Temperature: -40°C to +85°C
• Power Supply: 24V DC from Backplane

Supported Sensor Specifications

• Thermocouples (with CJC): Types J, K, T, E, R, S, B, N, C (Max Lead Resistance: 100 Ω/Leg)
• RTDs: PT100 3-wire (Max 40 Ω Balanced), 100 Ω (except Low), 500 Ω, 1000 Ω (Max 100 Ω/Leg)
• Special RTDs: 100 Ω YIS (100 Ω/Leg), 100-Low RTD & 10 Ω Cu (10 Ω/Leg)
• Voltage Ranges: 0-10V, -10 to +10V, 0-5V, 1-5V
• Current Ranges: 0-20mA, 4-20mA
• Millivolt Ranges: User-configurable spans (e.g., 0-50mV, -50 to +50mV)
• Resistance Ranges: 0-400 Ω, 0-2000 Ω

Module Features & Diagnostics

• Each of the 8 channels is user-configurable for different sensor types on a per-point basis.
• Point-to-point isolation (400VDC) prevents ground loops and crosstalk between channels.
• Integrated burnout detection for thermocouples and mV inputs configurable for fail-safe operation.
• Advanced diagnostics monitor 24V supply, factory calibration integrity, and module configuration.
• T/C break detection and a pre-failure warning (for impedance >100Ω) enable predictive maintenance.
• Calibration data and channel configuration are stored in non-volatile memory, eliminating need for reconfiguration after power loss.
• Module status is indicated via LED: green blinking (scanning) and red (diagnostic fault).

Installation & Configuration

• Install in a compatible Honeywell HC900 rack (e.g., 900R04-0300).
• Use shielded, twisted-pair wiring for analog signals and ensure proper grounding.
• Configure each channel via the HC900 configuration software for the specific sensor type and range.
• For RTDs, use 3-wire connection and ensure lead resistance matches specifications.
• For thermocouples, ensure the module's cold junction compensation (via onboard RTDs) is enabled.
• Verify signal integrity and accuracy after installation using the system's diagnostic tools.

For configuration support or to order the Honeywell 900A01-0202, contact our technical sales team.

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

Partner: NexAuto Technology Limited

© 2026 AutoNex Controls Limited. All rights reserved.