Product Details
The Honeywell 51400993-100, also cataloged as the 51400993-100 Enhanced Operator Keyboard Assembly, operates as a dedicated hardware component for operator command input and process key matrix encoding within Honeywell TDC 3000 console systems. It routes tactile membrane switch activations directly to host operator station electronics to execute real-time control actions.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 51400993-100 |
| Brand | Honeywell |
| Origin | USA |
| Weight | 4.00 lbs |
| Dimensions | Standard Console Bay Mount |
| Operating Temp | 0 deg C to 50 deg C |
| Power Consumption | Logic Level Backplane Power |
| Assembly Type | Complete Keyboard Assembly with ABCDE Membrane |
| Interface Type | Dedicated Console Serial Bus |
| Mounting Form | Operator Station Console Cutout |
Channel-to-Channel Isolation and Loop Protocol Integration
The Honeywell 51400993-100 operator keyboard assembly utilizes channel-to-channel isolation on its internal matrix interface logic to decouple local keypad scanning from backplane ground potential shifts. When host control stations process field inputs from 4-20 mA HART loop protocol transmitters across distributed node networks, the keyboard assembly maintains isolated, noise-immune signal paths to ensure deterministic key-scan responses during high-traffic bus operations.
Frequently Asked Questions
Q: Does replacing the membrane key assembly require software re-configuration at the station?
A: No, the hardware assembly operates via fixed physical key-matrix address decoding and interfaces directly without host station software modifications.
Q: Can the keyboard module be inserted into an energized console station?
A: Hot-insertion is discouraged; disconnecting logic-level power prior to cabling prevents transient voltage spikes on the console signal bus.
Field Installation Guidelines
- Disconnect console power and field loop power before mounting or servicing the keyboard assembly.
- Align the membrane chassis correctly within the operator station cutout to avoid mechanical stress on the ribbon connectors.
- Fasten all panel retention hardware to establish a low-impedance ground bond with the main enclosure frame.
- Route the internal interface cable away from high-voltage AC conductors to limit electromagnetic field coupling.
- Verify cable connector retention locks are fully latched before applying power to the operator station.
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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