Honeywell 51400993-100 Operator Keyboard

Overview

The Honeywell 51400993-100 Operator Keyboard and Pointing Device Interface Module is a dedicated internal interface board engineered for Honeywell operator workstations used in mission-critical control room environments.
It serves as the hardware communication bridge between Honeywell enhanced operator keyboards, trackballs, and the workstation processing electronics, ensuring precise, responsive, and stable operator input during continuous plant operation.

Designed for long service life, this module supports Honeywell legacy and modern operator stations, maintaining consistent input performance under 24/7 industrial duty cycles.

Key Functions

The 51400993-100 module performs signal acquisition, conditioning, and protocol handling for operator input devices. By isolating and stabilizing keyboard and pointing device signals, it protects workstation CPUs from noise, latency, and signal degradation commonly encountered in control room installations.

Its internal mounting design allows seamless integration into Honeywell console assemblies without external cabling complexity.

Technical Specifications

General Characteristics

• Model / Part Number: 51400993-100

• Product Type: Operator Keyboard & Pointing Device Interface Module

• Manufacturer: Honeywell

• System Compatibility: TPS, TDC 3000, Experion PKS operator stations

• Supported Stations: Universal Station (US), Global User Station (GUS), Experion Station (ES-T / ES-F)

Electrical & Communication

• Supported Input Devices:

• Honeywell enhanced operator keyboards

• Trackball and proprietary pointing devices

• Keyboard Technology:

• Enhanced operator keyboard with ABCDE membrane layout

• Complete industrial keyboard assembly

• Interface Method:

• Honeywell proprietary keyboard/pointing protocol

• PS/2-type signaling on selected hardware revisions

• Power Supply:

• Draws regulated power directly from the workstation backplane

• Signal Processing:

• Hardware debounce and filtering

• Buffered signal output for stable CPU communication

Performance & Reliability

• Input Response:

• Deterministic, real-time signal handling

• Operating Duty:

• Continuous 24/7 control room operation

• Diagnostics:

• Status indication via onboard LEDs (revision dependent)

• EMC Considerations:

• Designed for low-noise indoor control environments

Environmental Ratings

• Operating Temperature: 0 °C to +50 °C

• Storage Temperature: –20 °C to +70 °C

• Relative Humidity: 10% to 90% non-condensing

• Installation Environment: Indoor, climate-controlled control rooms

Mechanical Information

• Mounting Style:

• Internal installation within operator console or workstation chassis

• Form Factor:

• Honeywell proprietary workstation module

• Approximate Weight:

• Interface module: 0.3–0.6 kg (revision dependent)

• Enhanced operator keyboard assembly: approximately 4.00 lbs

Typical Applications

• Distributed Control System (DCS) operator consoles

• Central control rooms in process industries

• Power generation and utilities monitoring stations

• Oil & gas and chemical plant operator workstations

• Legacy Honeywell console modernization projects

Compatibility Notes

The 51400993-100 is commonly paired with Honeywell enhanced operator keyboards such as 51400989-100 and related pointing devices. Compatibility may vary by workstation generation and backplane configuration; verification against station hardware revision is recommended prior to installation.

Frequently Asked Questions

Q: Is the 51400993-100 interchangeable with standard PC keyboard interfaces?
A: No. This module uses Honeywell proprietary signaling and is not compatible with standard USB or commercial PC keyboards.

Q: Can this module be hot-swapped during operation?
A: No. Installation or replacement should be performed with the workstation powered down to avoid damage.

Q: Does the module include the keyboard assembly?
A: No. The interface module and the enhanced operator keyboard are supplied as separate components unless otherwise specified.