Model Explanation

51400910-100: Honeywell part number (no delimiter 51400910100)

51400910 = EMEM Enhanced Memory Board Series

100 = Standard version, Rev C firmware, industrial-grade temperature

Component Type: EMEM PWA (Enhanced Memory Printed Wiring Assembly)

Compatible Devices: TDC 3000 Application Processor (AP), Universal Operator Station (GUS/US), LCN Controller Cabinet Technical Specifications

Memory Capacity: 8 MB RAM (expandable, original 4 MB → 12 MB total memory)

Memory Type: High-speed CMOS RAM with parity check

Data Cache: 256 KB high-speed cache (coordinated with EMPU)

Access Speed: ≤ 80 ns (fast read/write, improves computing efficiency)

Power Supply: 5 VDC (backplane, ±5%), power consumption ≤ 12 W

Operating Temperature: 0°C ~ +60°C (environment of the cabinet)

Storage Temperature: -40°C ~ +85°C

Humidity: 5%~95% RH (no condensation)

Size: Standard 19-inch card (3U)

Weight: Approximately 0.6 kg

Certifications: CE, UL, CSA

Interfaces and Configuration

Backplane Interface: LCN cabinet gold fingers, dedicated memory expansion bus

Connection Method: Direct connection with EMPU (51400901-100), memory sharing

Status Indicators: PWR, RUN, MEM ACT, FAULT LED

Redundancy: Supports 1:1 redundant configuration (synchronous redundancy with EMPU)

Compatibility: Compatible with all versions of TDC 3000 LCN network, compatible with AP, GUS, US and other controller devices Core function

Memory capacity expansion: The native 4 MB memory of AP/GUS has been expanded to 12 MB, supporting larger-scale control programs, historical data storage, and complex computations.

Data processing acceleration: The design of high-speed cache and fast access improves the system's computing speed by 30% or more, reduces control cycles, and enhances real-time performance.

Complex strategy support: It meets the memory requirements of multi-loop complex control strategies such as PID cascade, feedforward, sequential control, and batch control.

Historical data storage: The storage capacity of historical trends, alarm records, and system logs has been expanded, extending the data retention time and facilitating fault tracing and analysis.

System stability improvement: The parity check function detects and corrects memory errors, reducing the risks of system crashes and data corruption, and ensuring continuous operation. Applicable scenarios

System: Honeywell TDC 3000, TPS, Experion PKS (LCN compatible)

Equipment: Application processor (AP), Universal Operator Station (GUS/US), LCN controller cabinet, TDC 3000 process control system

Industry: Petrochemicals, thermal power, nuclear power, metallurgy, cement, pharmaceuticals, papermaking

Application: High-load process control, deployment of complex control strategies, large-capacity storage of historical data, upgrade of old system memory, replacement and maintenance of faulty cards