Honeywell 51303932-203 (51303932203) Product Details

Product Model: 51303932-203 (51303932203)

Brand: Honeywell

Product Category: MU-TSDM02 SDI FTA Serial Device Interface Field Termination Assembly

Applicable Systems: Honeywell Experion PKS C300 / TPS / UCN Distributed Control System 

I. Product Overview

51303932-203 is a pure automatic mode serial interface FTA of the Honeywell SDI (Serial Device Interface) series. It serves as the physical interface layer between the C300 controller and the on-site serial devices, responsible for signal conversion, electrical isolation, line protection, and supports RS-232/RS-485 serial communication protocols, enabling data interaction between the DCS system and intelligent instruments, frequency converters, PLCs, etc. Compared to the -202 model, it has no manual control switch and is fully controlled remotely by the system software.

II. Core Specification Parameters

1. Interface Characteristics

Interface Type: Serial Device Interface FTA

Communication Protocol: RS-232 (EIA-232) / RS-485

Channels: 1 channel

Mode: Pure Automatic Mode (no manual switch)

Baud Rate: Supports 300 ~ 115200 bps

Data Bits: 5/6/7/8 bits

Parity: None / Odd / Even Parity

Stop Bits: 1/2 bit

2. Electrical Parameters

Isolation Voltage: Channel - System 1500 V AC

Input Impedance: RS-232: 3 kΩ; RS-485: 120 Ω

Drive Capability: RS-485: Supports 32 nodes

Operating Power Supply: 24 V DC (backplane power supply)

Power Consumption: ≤ 2.5 W

Protection: Overvoltage, Overcurrent, Reverse Connection, Surge, ESD Protection

3. Environmental Parameters

Operating Temperature: -40°C ~ +75°C (wide temperature range)

Storage Temperature: -55°C ~ +85°C

Humidity: 5% ~ 95% RH (non-condensing)

Protection: PCB Three-Defense Coating (damp-proof, salt fog-proof, mold-proof)

Vibration / Impact: IEC 60068 Standard

EMC: FCC Part 15 Class A

4. Physical Characteristics

Size: Standard DCS Card (150 mm × 100 mm × 25 mm)

Weight: Approximately 0.3 kg

Installation: Hot-swappable, standard UCN / C300 Rack

Interfaces: Front spring-type terminals + Backplane Bus Interface

Status Indicators: PWR (Power), RUN (Operation), TX/RX (Transmit/Receive), FAULT (Fault) LEDs

5. Certification

Certification: CE, FCC Class A, UL

Compliance: RoHS (some versions)

III. Functional Characteristics

1. Serial Communication Interface

Protocol Compatibility: Supports Modbus RTU, ASCII, DF1, third-party serial protocols

Pure Automatic Control: No local hardware switch, all communication states are remotely configured and controlled by the system software

Data Transparent Transmission: No protocol conversion, direct transmission

Full Duplex / Half Duplex: RS-232 Full Duplex; RS-485 Half Duplex

2. Signal Isolation and Protection

High Electrical Isolation: 1500 V AC, suppressing ground potential difference

Multi-level Protection: TVS Surge, PTC Overcurrent, Reverse Connection Protection

Impedance Matching: Built-in terminal resistor, suitable for long-distance transmission

3. System Compatibility

Fully Compatible: Experion PKS C300, TPS, UCN Systems

Plug-and-Play: Direct replacement with the same series FTA (202/226/227/428/476)

No Redundancy: Single-channel non-redundant design

4. Application Adaptability

Wide Temperature Three-Defense: Suitable for extreme temperature, high humidity, corrosive environments

Long-distance Transmission: RS-485 Supports the Farthest 1200 m Multi-device networking: RS-485 supports communication among multiple devices

IV. Key differences from 51303932-202 Table

Characteristic 51303932-203 51303932-202

Control mode Pure automatic mode (without manual switch) Manual / Automatic dual mode (hardware switch switching)

Local control ❌ No local hardware control ✅ Has local manual / automatic switching switch

Applicable scenarios Completely relying on DCS remote control, unmanned stations Requires local manual intervention, frequent debugging and maintenance scenarios

Hardware design Simplified version, without manual switch circuit Complete version, with manual control circuit

V. Typical Applications

Intelligent instrument communication: Transmitters, analyzers, flowmeters, Modbus access

Frequency converter control: Parameter monitoring and speed control of frequency drive devices

PLC data interaction: Third-party PLC and DCS networking

Remote I/O communication: Distributed remote I/O module data acquisition

Barcode / weighing equipment: Automatic identification and weighing system access in production lines

Long-distance equipment networking: Centralized access of serial devices in factory peripheries

Unattended stations: Remote stations, no local operation requirements

VI. Usage and Maintenance Key Points

Connection: RS-485 uses shielded twisted pair, terminal connected to 120 Ω power resistor

Mode setting: Pure software configuration, through system configuration to set communication parameters

Verification: Regularly check communication rate and parity match

Fault: Non-redundant design, faults require offline replacement

VII. Product Status

Type: DCS serial interface terminal component (spare part)

Production status:停产 (legacy spare part)

Supply： Original inventory， refurbished， second-hand spare parts

Replacement： New C300 serial interface module

VIII. Model Code Interpretation (51303932-203)

513： Honeywell DCS spare part prefix

03932： SDI serial device interface FTA series

-203： Pure automatic mode， RS-232/485， wide temperature range， CE version