Honeywell 900U02-0100 Universal I/O Module

Honeywell 900U02-0100 Universal I/O Module

The 900U02-0100 is a versatile Universal Input/Output (UIO) module for the Honeywell HC900 safety and control system. It combines high-density analog input and output channels with robust safety features.

Core System Specifications

• Brand: Honeywell
• Model Number: 900U02-0100
• Product Type: Safety Universal I/O Module
• Channel Capacity (Non-Redundant): 16 Channels Total
• Channel Capacity (Redundant): 14 Channels Total
• Field Supply Voltage: 24V DC (Typical)
• Voltage Range: 22V DC (Min) to 27V DC (Max)
• Module Max Load: 4.2 Amps
• Max Current per Channel: 500 mA
• Isolation (Module to Rack/Module): 1.5 kVDC
• Update Rate: 10 ms
• Electronic Short-Circuit Protection (ESCP): 620 mA (Re-settable, per channel)
• Channel Fuse: Internal, non-replaceable (1 Amp)
• Field Supply Fuse: Internal electronic fuse (10 Amps)

Analog Input Specifications

• Input Type: Current (2, 3, or 4-wire devices)
• Supported Protocols: Sink-type transmitters, HART
• Channels per Module: 16 maximum (line-monitored)
• A/D Converter Resolution: 16 Bit
• Input Range: 4-20 mA (cut-off limits: 3-22 mA)
• Crosstalk (DC to 60 Hz): 58 dB (channel-to-channel)
• Input Impedance: 250 Ω nominal
• Max Input Voltage (to common): 0 - 30V (no damage)
• Hardware Accuracy (23.5°C): 0.1% of full-scale (Non-Redundant), 0.2% (Redundant)
• Hardware Accuracy (0 to +60°C): 0.17% of full-scale (Non-Redundant), 0.34% (Redundant)
• Transmitter Power Conditioning: Current limited to 24 mA
• Input Filter: First-order low-pass, 1 kHz

Analog Output Specifications

• Output Type: 4-20 mA current loop, HART supported
• Channels per Module: 8 maximum (assignable as channels 9-16, line-monitored)
• Accuracy (25°C): <0.5% of Full Scale (Non-Redundant), <1% (Redundant)
• Output Ripple: ≤ 125 mV peak-to-peak (at power line frequency, across 250Ω load)
• Output Readback Accuracy: 0.17% of full scale
• Output Current Linearity: ± 0.1% of Full Scale nominal
• Resolution: 12 Bit
• Settable Output Range: 2.4 mA to 21 mA
• Maximum Resistive Load: 7504 Ohms
• Minimum Resistive Load: 250 Ohms
• Maximum Output Compliant Voltage: 14 VDC (with 22-28V DC supply)
• Maximum Open Circuit Voltage: 24 VDC
• Maximum Load Capacitance: < 1 uF

Module Features & Safety

• Combines 16 analog inputs and 8 analog outputs in a single, high-density module.
• Integrated 1.5 kVDC isolation protects logic-side electronics from field-side faults.
• Electronic Short-Circuit Protection (ESCP) per channel prevents damage from field wiring errors.
• Fast 10ms update rate ensures responsive control for critical process loops.
• Supports HART communication for advanced device configuration and diagnostics.
• Designed for both non-redundant and redundant system architectures for high availability.

Installation & Wiring Guidelines

• Install in a compatible Honeywell HC900 rack (e.g., 900R04-0300).
• Provide a clean, stable 24V DC power supply within the 22-27V DC range.
• Use appropriate wire gauges to handle the 500 mA per channel maximum current.
• For HART communication, ensure proper network resistance and device addressing.
• Observe the maximum load specifications (7504Ω max, 250Ω min) for analog outputs.
• Maintain proper grounding and separation from high-voltage cables to ensure signal integrity.

For detailed wiring diagrams or to order the Honeywell 900U02-0100 module, contact our engineering team.

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