Product Details
Configured for discrete state sensing and field status processing in ControlEdge HC900 controller platforms, the Honeywell 900G02-0203 (900G02 Digital Input Module) provides direct physical/electrical execution. The hardware assembly monitors 16 discrete input channels, receiving typical 24 VDC voltage signals from field contact closures, limit switches, and auxiliary relays. Featuring galvanically isolated channel banks and user-defined fail-safe state execution upon communication loss, the module transmits real-time binary telemetry over the backplane to the central CPU.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 900G02-0203 |
| Brand | Honeywell |
| Origin | USA |
| Weight | 0.3 kg (9.0 oz) |
| Dimensions | 5.1 cm x 15.2 cm x 15.2 cm (2.0 in x 6.0 in x 6.0 in) |
| Operating Temp | 0 to 60 deg C (32 to 140 deg F) |
| Power Consumption | Backplane powered via HC900 chassis |
| Input Channels | 16 discrete input channels |
| Input Voltage | 24 VDC nominal |
| Galvanic Isolation | Galvanically isolated in 2 groups of 8 channels to chassis ground |
| Fail-Safe Execution | User-defined state on backplane communication timeout |
| Status Indicators | POWER, STATUS, FAULT, TX/RX status LEDs |
| Mounting Type | Rack-mounted in ControlEdge HC900 I/O chassis |
Channel-to-Channel Isolation & DCS Field Interfacing
The Honeywell 900G02-0203 digital input card incorporates robust galvanic isolation divided into two independent 8-channel groups. This internal electrical barrier isolates field-side ground potential differences from the sensitive backplane logic circuits, protecting the system against common-mode voltage transients. Suppressing ground loops across incoming discrete lines prevents signal degradation on adjacent analog input channels processing sensitive 4-20 mA HART loop protocol loops within the same I/O rack.
Frequently Asked Questions
Q: How does the 900G02-0203 input module behave if communication with the HC900 CPU is lost?
A: The module executes a user-defined fail-safe state configuration, maintaining assigned discrete logic default states until backplane bus communication is re-established.
Q: Are the 16 input channels on the 900G02-0203 individually isolated from each other?
A: No, the 16 discrete channels are divided into two galvanically isolated groups of 8 channels each, sharing common return terminals within each group.
Field Installation Guidelines
- Seat the 900G02-0203 module firmly into its designated slot within the ControlEdge HC900 rack until the retention latches lock securely.
- Route field input wiring through dedicated wire ducts, separating 24 VDC discrete signal lines from high-voltage AC power conductors.
- Verify field terminal power source voltage before applying power to ensure incoming voltage matches the 24 VDC nominal rating.
- Connect cable shields to the system grounding bar at one end only to prevent secondary ground loop path formation.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
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