Product Description

Overview

The 51309355-001 by Honeywell is a high-reliability Main Processor Board designed for the DR4500 series Circular Chart Recorders, including Classic and Truline models. Serving as the central computing unit, this board manages analog chart recording, digital display outputs, and multi-channel data acquisition, effectively bridging traditional chart recording with modern process control.

Key Features

Centralized Control & Data Management

• Coordinates up to 4 simultaneous process variables on a single circular chart

• Integrates analog recording with real-time digital displays for precise process visualization

• Supports fiber-tip pen synchronization for accurate analog trace recording

Input & Output Capabilities

• Compatible with RTDs, thermocouples, and 4–20 mA or voltage signal loops

• Enables 1–2 digital control loops for direct process control of valves, heaters, or actuators

• Digital processing ensures instantaneous engineering unit readouts

Data Integrity & Reliability

• Onboard battery-backed non-volatile memory preserves configuration and calibration data

• High-resolution A/D converters maintain analog-to-digital fidelity

• Designed for continuous operation in industrial environments

Industrial Durability

• Thermal-stable design for operation between 0°C and 55°C

• Resistant to vibration and electrical noise in manufacturing, chemical, and laboratory settings

• Compact PCB assembly designed for direct integration into DR4500 recorders

Technical Specifications

Applications

• Industrial process monitoring in chemical, pharmaceutical, and power generation environments

• Laboratory and pilot plant data acquisition for multiple process variables

• Replacement board for legacy Honeywell DR4500 Classic and Truline recorders

• Enables integration of digital control loops with analog chart recording

Installation Notes

• Mount directly within DR4500 recorder chassis

• Ensure proper edge connector seating and anti-static handling

• Connect compatible sensors per recorder configuration

• Calibrate each channel using DR4500 setup menu

• Verify chart rotation, pen alignment, and alarm thresholds after installation

FAQ

Q: Which Honeywell models is this board compatible with?
A: It supports all DR4500 Classic and Truline Circular Chart Recorders.

Q: How many process variables can it manage?
A: Up to 4 simultaneous channels with synchronized chart recording.

Q: Does it support digital control loops?
A: Yes, it can manage 1–2 digital control loops for direct process actuation.

Q: Is the board durable for industrial use?
A: Yes, it operates in 0–55°C, resists vibration, and maintains data integrity in harsh environments.