Model Explanation

51401072‑300: Honeywell part number (written as 51401072300)

51401072 = QMEM‑3 Enhanced Memory Module Series

300 = Third Generation, Large Capacity, High-Speed Version, Rev A Firmware

Component Type: QMEM‑3 PWA (Printed Circuit Board Assembly for Enhanced Memory Module)

Compatible Systems: TDC 3000, TPS, Experion PKS (LCN Network)

Replacement/Upgrade: Replace 51401072‑100/200 (QMEM‑1/2), compatible with the entire series of LCN nodes Technical Specifications

Memory capacity: 4 MB high-speed RAM (QMEM-3), which is 4 times that of QMEM-1 (1 MB) and 2 times that of QMEM-2 (2 MB)

Cache type: High-speed SRAM with ECC verification, supporting data error correction

Data bandwidth: 32-bit parallel bus, with a bandwidth of 40 MB/s

Access latency: ≤ 80 ns (random read/write)

Processor compatibility: Compatible with AM/HM node 16/32-bit main processors

Power supply: 5 VDC (backplane, ±5%), power consumption ≤ 18 W

Operating temperature: 0°C ~ +60°C

Storage temperature: -40°C ~ +85°C

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

Size: Standard 19-inch card (3U), dedicated slot for LCN

Weight: Approximately 0.8 kg

Certifications: CE, UL, CSA, FM

Interface and Configuration

Backplane interface: LCN cabinet gold fingers, dedicated 32-bit memory expansion bus

Status indicators: PWR, ACT, RDY, FAULT, ECC ERR LED

Configuration method: Built-in jumpers (memory address, ECC enable) + system software configuration

Redundancy: Supports 1:1 hot redundancy, seamless fault switching, zero data loss

Compatibility: Compatible with all versions of TDC 3000 LCN, compatible with AM, HM, UWS, etc. nodes Core function

Super large capacity data cache: 4 MB ECC RAM, significantly enhancing the online database and historical data caching capabilities of AM, supporting more process points, historical trends and alarm records storage

High-speed data processing acceleration: 32-bit high-speed bus, bandwidth 40 MB/s, significantly reducing data read/write latency, improving system response speed, suitable for complex control algorithms and large data volume calculations

Fast access to historical data: Optimized data interaction between HM and SCSI hard drives, the speed of historical trend retrieval increased by 3 times, supporting longer time periods and higher resolution historical data storage

ECC data error correction protection: Built-in ECC check, automatically detects and corrects single-bit errors, avoiding memory data corruption, ensuring the reliability of critical control and historical data

System expansion and performance improvement: Directly replace QMEM-1/2, without modifying the system architecture, can achieve memory expansion and performance upgrade, reducing the cost of upgrading the old system Applicable scenarios

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

Equipment: LCN application module (AM), historical module (HM), universal workstation (UWS) cabinet

Industry: Large-scale petrochemicals, thermal power, nuclear power, metallurgy, cement

Application: System memory expansion, historical data storage upgrade, operation of complex control algorithms, real-time monitoring of large data volumes, performance improvement of old systems