Honeywell MCP-1004

Product Name: Honeywell UCN / TDC 3000 Multi-Function Control Processor (MCP) — Model MCP-1004

Product Description: A central processing module for the Honeywell TDC 3000 Universal Control Network (UCN) system, functioning as a Process Manager (PM) or Application Processor (APM) CPU, executing control strategies, data acquisition, and peer-to-peer communication.

Category: Honeywell

Description

Technical Specifications:

Architecture: 32-bit processor with battery-backed RAM and EPROM/Flash
Memory: Program and data memory (typical 1–4 MB depending on revision)
Network Interface: UCN coaxial / fiber optic (IEEE 802.4 token bus derivative)
Power Requirement: +5 VDC / +12 VDC / -12 VDC from dedicated rack power supply
Battery: Lithium backup cell for RAM retention (replace at recommended interval)
Indicators: RUN, ERROR, COMM LEDs
Operating Temp: 0 °C ~ +55 °C

Features:

Executes CL (Control Language) programs and function blocks
Supports peer-to-peer data exchange with other UCN nodes
Watchdog timer for automatic fault detection
Download/upload via Engineering Station (GUS / US)

Applications: Continuous and batch process control in refineries, chemical plants, pulp & paper — legacy TDC 3000 installations.

Construction: Dual-slot circuit board with front faceplate, DIP switches for node address, battery holder, connector to rack backplane.

Working Principle: Scans configured control strategy at defined execution period → reads I/O data from connected I/O processors via UCN → computes outputs → writes back to I/O → sends status to operator stations.

Installation & Precautions:

Set UCN node address via DIP switches BEFORE inserting.
Verify battery is good before downloading configuration.
Keep spare battery; replace during scheduled maintenance — note RAM is lost if battery fails AND power is removed.
Do not expose to static; handle by edges only.
Backup database before any firmware or program changes.

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