Honeywell 900G03-0202 – 32-Channel 24VDC Digital Input Card | HC900 DCS Platform
Engineering Background
The Honeywell HC900 is a scalable hybrid DCS/PLC platform widely deployed in process industries including refining, chemicals, power generation, and pharmaceuticals. Designed for continuous and batch process control, the HC900 architecture separates controller logic from I/O subsystems via a high-speed rack backplane, enabling deterministic scan times and hot-swap I/O replacement without process interruption.
Product Positioning
The 900G03-0202 is a 32-channel discrete (digital) input module engineered for the HC900 I/O rack. It acquires field-level 24VDC dry-contact or wet-contact signals and delivers them to the HC900 controller over the internal backplane bus. This card is the standard choice for high-density digital field wiring in HC900 installations requiring reliable, noise-immune discrete signal acquisition.
Complete Technical Specifications
- Part Number: 900G03-0202
- Manufacturer: Honeywell Process Solutions
- Platform: HC900 Hybrid DCS
- Module Type: Digital Input (DI) Card
- Channel Count: 32 channels
- Input Voltage: 24VDC nominal
- Input Type: Dry contact / Wet contact (sourcing)
- Logic Level ON: ≥ 11VDC
- Logic Level OFF: ≤ 5VDC
- Isolation: Optical isolation, channel-to-backplane
- Scan Rate: Synchronized with HC900 controller scan cycle
- Backplane Interface: HC900 I/O rack backplane (proprietary)
- Module Weight: ~4,460 g (with packaging)
- Operating Temperature: 0°C to 60°C
- Storage Temperature: -40°C to 85°C
- Humidity: 5% to 95% RH, non-condensing
- Certifications: CE, UL listed (per Honeywell HC900 platform certification)
- Country of Origin: USA
Proven Application Environments
- Petroleum refining and upstream oil & gas process control
- Chemical batch and continuous process automation
- Power plant auxiliary systems and boiler control
- Pharmaceutical manufacturing (FDA 21 CFR Part 11 compatible environments)
- Pulp & paper and water/wastewater treatment facilities
- Any HC900-based DCS installation requiring high-density discrete input acquisition
Engineering Advantages
- High Channel Density: 32 DI channels per card slot minimizes rack space and wiring cost
- Optical Isolation: Protects controller backplane from field-side transients and ground loops
- Hot-Swap Capable: Supports live replacement within HC900 rack without controller shutdown
- Deterministic Acquisition: Inputs scanned synchronously with controller cycle for consistent process data
- Wide Input Compatibility: Accepts both dry-contact relay outputs and 24VDC sourcing field devices
- Proven Reliability: Designed to Honeywell SIL-capable process control standards
System Architecture & Signal Flow
Field devices (limit switches, proximity sensors, relay contacts, pushbuttons) wire directly to the 900G03-0202 terminal block. The module conditions each 24VDC signal through optical isolation circuitry and presents the binary state to the HC900 backplane. The HC900 controller reads all 32 channels within each scan cycle and makes the data available to the control strategy (function blocks) in real time. Status LEDs on the module faceplate provide per-channel indication for rapid field commissioning and fault diagnosis.
Sourcing & Quality Verification
- All units sourced from authorized distributors or verified surplus channels with documented chain of custody
- Pre-shipment inspection: visual, label authenticity, firmware/hardware revision verification
- Functional test available on request prior to shipment
- Original Honeywell packaging and documentation supplied where available
- Counterfeit-prevention policy: units failing authentication are quarantined and not sold
Procurement Process
- Submit your RFQ via support@konmask.com or place order directly on this page
- Receive stock confirmation and lead time within 24 business hours
- Pro-forma invoice issued; payment via T/T, PayPal, or agreed terms
- Unit inspected, packed, and dispatched with tracking within 2–3 business days
- Post-delivery technical support available via email or WhatsApp
Technical FAQ
Q: Is the 900G03-0202 compatible with all HC900 rack sizes?
A: Yes. The module is compatible with all HC900 I/O rack configurations (4-slot, 8-slot, 12-slot) as a standard I/O card.
Q: Can this card accept 120VAC inputs?
A: No. The 900G03-0202 is rated for 24VDC inputs only. For 120VAC discrete inputs, refer to the 900G01 series.
Q: Is a firmware update required when replacing an existing card?
A: No firmware update is required. The HC900 controller automatically recognizes the replacement card upon insertion.
Q: What is the warranty on this module?
A: Konmask.com provides a 90-day functional warranty on all verified modules. Extended warranty available on request.
Q: Can you supply the HC900 controller or other rack components?
A: Yes. Contact us with your full BOM for a consolidated quotation on HC900 system components.
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