Model Explanation

51401052-100: Honeywell part number (written as 51401052100)

51401052 = SPC (Smart Peripheral Card) intelligent peripheral card series

100 = Standard version, Rev A firmware, SCSI standard adapter

Component Type: SPC PWA (Smart Peripheral Card Printed Circuit Board Assembly)

Adaptation System: TDC 3000, TPS, Experion PKS (LCN network)

Alternative Model: No direct alternative. It is a dedicated card for historical modules. Technical Specifications

Processor: Specialized 16-bit I/O processor, with a main frequency of 15 MHz

Memory: 64 KB RAM (data cache), 32 KB EPROM (firmware)

Interface: 1 SCSI-2 interface (DB50), supporting hard drives / tape drives

Protocol: SCSI-2 standard protocol, supporting single-ended / differential mode

Power supply: 5 VDC (backplane, ±5%), power consumption ≤ 15 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), historical module slots

Weight: Approximately 0.5 kg

Certifications: CE, UL, CSA, FM

Interface and Configuration

Backplane interface: Historical module cabinet pins, dedicated I/O control bus

External interface: SCSI-2 DB50 interface (for connecting hard drives / tape drives)

Status indicators: PWR, ACT, SCSI ERR, FAULT LEDs

Configuration method: Built-in jumpers (SCSI ID, termination resistor) + system software configuration

Redundancy: Supports 1:1 hot redundancy to ensure uninterrupted historical data storage

Compatibility: Compatible with all versions of TDC 3000 historical modules, compatible with WREN III and other SCSI hard drives Core function

SCSI Storage Device Management: As the interface between the historical module and SCSI hard drives, it controls the reading and writing of the hard drives, manages data caching, and performs error checking. It supports large-capacity storage ranging from 875MB to 1.8GB, ensuring reliable storage of historical data.

High-speed Transmission of Historical Data: Achieves high-speed data interaction between the LCN network and SCSI devices, supporting real-time writing and quick retrieval of historical trends, alarm records, and event logs. The transmission rate can reach up to 10 MB/s.

Hard Disk Diagnosis and Fault Protection: Real-time monitoring of the hard drive status, read/write errors, and SCSI bus faults. In case of abnormalities, it triggers DCS alarms and automatically switches to redundant hard drives to prevent data loss.

System Clock Synchronization: Provides an accurate clock reference for the historical module, ensuring consistency of the timestamp of historical data, and supporting synchronization with the LCN network clock.

Firmware Online Upgrade: Supports online firmware updates through the system software, without the need to disassemble the card, reducing maintenance costs. Applicable scenarios

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

Equipment: Historical module cabinet, WREN III SCSI hard drive, 875MB/1.8GB storage device

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

Application: DCS historical data storage, trend recording, alarm archiving, event tracing, system log management

Differences from related cards

SPC (51401052-100): Dedicated for SCSI storage, manages historical module hard drives, focuses on data storage and retrieval.

PLCI/EPLCI (51400997-100/200): Dedicated for PLC communication, connects third-party PLCs, focuses on protocol conversion and data interaction.