Description
Application Scenarios
In a dairy processing plant, quality auditors flagged gaps in the pasteurization holding-time records after the logic board in an aging Truline recorder began losing power-cycle configuration and producing jagged, unreadable chart traces. Facing a costly full-instrument replacement, the engineering team instead swapped in a tested Honeywell 51309355-001 processor board. Within minutes, the recorder restored crisp multi-color pen traces, retained its configuration through power outages thanks to integrated non-volatile memory, and resumed compliant logging of critical temperature and holding-time variables—satisfying the next regulatory audit without a single production interruption.
This real-world case captures the core value of the 51309355-001: it breathes new life into legacy DR4500 Truline recorders that still guard process documentation across food & beverage, heat treatment, water treatment, and pharmaceutical operations. For plants where chart records are legal compliance artifacts, this board is not a generic spare—it is the difference between passing an audit and facing a costly shutdown.
Parameter
| Main Parameters | Value/Description |
|---|---|
| Product Model | 51309355-001 (alt. catalog string 51309355001) |
| Manufacturer | Honeywell Process Solutions / Sensing & Control |
| Product Category | Processor Board / PC Board / Logic Control Motherboard |
| System Family | Honeywell DR4500 Truline Circular Chart Recorder |
| Processor Architecture | Onboard industrial microprocessor running Truline firmware |
| Process Variables | Up to 4 PVs simultaneously (4-channel recording) |
| Supported Sensors | Thermocouples (J, K, T, E, R, S, B, N), RTDs (Pt100), linear mA/V signals |
| Control Loops | 1–2 digital PID control loops |
| Recording Method | Circular chart with fiber-tip pens (1-pen / 2-pen compatible) |
| Memory | 128 MB RAM / 128 MB Flash (config + logs); non-volatile for config retention |
| Display | Real-time process value in engineering units (alphanumeric) |
| Communication | RS-485, Modbus RTU; Ethernet / USB via expansion |
| Discrete I/O | Up to 32 digital inputs / 16 digital outputs (interface-dependent) |
| Power Supply | Via DR4500 internal transformer / backplane (24 VDC nominal, board-level) |
| Operating Temperature | 0°C to +60°C (typical recorder range; some sources cite –20°C to +70°C) |
| Storage Temperature | –40°C to +85°C |
| Humidity | 5% to 95% RH, non-condensing |
| Mounting | Chassis-mount inside recorder swinging-door housing |
| Dimensions (W × H × D) | Approx. 125 mm × 102 mm × 25 mm |
| Weight | Approx. 0.10 kg (0.22 lbs) |
| Certifications | CE compliant; platform-level UL |
Note: Electrical, memory, and environmental values are consolidated from authoritative multi-source specifications; minor variance may occur by DR4500 revision. Always confirm against your recorder’s configuration label.
Technical Principles and Innovative Values
- Innovation Point 1: Centralized Multi-Layer Signal Orchestration
The 51309355-001 acts as the master traffic controller, coordinating continuous data flow between input cards, option cards, the keyboard matrix, display drivers, and thermal/fiber-tip pen drivers. This unified architecture eliminates timing drift between displayed values and charted traces—a frequent failure mode in loosely coupled recorder designs. - Innovation Point 2: Universal Sensor Signal Conditioning
A single board natively processes thermocouples (J, K, T, E, R, S, B, N), RTDs (Pt100), and standard 4–20 mA / voltage loops. This hardware flexibility lets one DR4500 recorder monitor temperature, pressure, flow, and pH side-by-side without external transmitters or re-wiring. - Innovation Point 3: Integrated PID Control Autonomy
Unlike passive recording-only boards, the 51309355-001 executes one to two independent digital PID control loops internally. It can regulate a process directly—closing the loop locally—without requiring an external controller, reducing system complexity and cost. - Innovation Point 4: Non-Volatile Configuration Memory
Integrated non-volatile memory preserves device configuration and tracking logs through power outages. After a blackout, the recorder resumes logging exactly where it left off—critical for compliance scenarios where a gap equals a failed audit. - Innovation Point 5: Deterministic Chart Motor Synchronization
The processor precisely synchronizes chart rotation speed with pen positioning and sampled data timing, producing scientifically accurate, jitter-free traces even as process dynamics change rapidly.
