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Produ
ct Introduction
The Honeywell 621-4350R Input Module is a versatile and reliable analog input module developed for Honeywell’s TDC 3000 distributed control system. It is engineered to handle multiple analog signals from field instrumentation, such as sensors and transmitters, and accurately convert them into digital signals that the control system can process.
This module supports a variety of analog input types, typically including 4–20 mA and voltage signals. It is commonly used in high-demand industrial environments where precision, isolation, and system integration are essential. The 621-4350R is designed to be mounted within a system cabinet or I/O chassis and seamlessly integrates into existing Honeywell control architectures.
Its rugged design and high immunity to electrical noise make it ideal for critical operations in sectors like oil and gas, power generation, chemicals, and manufacturing. With its diagnostic features, the module enables rapid troubleshooting and ensures continuous monitoring of operational data, making it a key element in automated process control.
Technical Specifications
| Specification | Description |
|---|---|
| Model | 621-4350R |
| Manufacturer | Honeywell |
| Product Type | Analog Input Module |
| System Compatibility | Honeywell TDC 3000 |
| Input Channels | 8 Analog Channels |
| Input Signal | 4–20 mA, 0–10 V (Field-configurable) |
| Resolution | 12-bit |
| Channel Isolation | Galvanically Isolated |
| Input Impedance | ≥ 250 Ω (Current), ≥ 1 MΩ (Voltage) |
| Accuracy | ±0.1% of Full Scale |
| Update Rate | < 10 ms per channel |
| Diagnostics | Signal loss, wiring integrity monitoring |
| Power Requirement | 24 VDC (Nominal) |
| Mounting Type | Chassis-mounted |
| Cooling Method | Natural Convection |
| Operating Temp. | 0°C to +60°C (32°F to 140°F) |
| Storage Temp. | -40°C to +85°C (-40°F to 185°F) |
| Humidity | 5%–95% RH, non-condensing |
| Protection Rating | IP20 |
| Dimensions (L×W×H) | 118 x 47 x 94 mm |
| Weight | 0.5 kg |
| Compliance | CE, UL, RoHS |
Product Applications
The Honeywell 621-4350R is deployed in a wide range of industrial settings due to its flexibility and reliability. Key application areas include:
-
Oil and Gas Facilities
Captures analog signals from pressure, flow, and temperature sensors in drilling, refining, and transport systems. -
Chemical Processing Plants
Integrates data from field transmitters for precision control in chemical mixing, heating, and cooling processes. -
Power Generation
Monitors turbine, boiler, and generator analog signals to maintain safety and energy efficiency. -
Water Treatment Plants
Gathers critical water quality data including pH, turbidity, and flow rates to maintain safe water standards. -
Food and Beverage Production
Ensures process consistency by monitoring environmental and ingredient variables during production. -
Pharmaceutical Manufacturing
Supports batch and continuous processes that require strict regulatory compliance for environmental control.
Product Advantages
-
High Signal Accuracy
Maintains precision signal conversion with minimal error, ensuring system data integrity. -
Multi-Signal Compatibility
Supports both current and voltage inputs, enabling broad integration across various sensor types. -
Isolated Channels for Noise Reduction
Channel-level isolation prevents electrical interference and improves data quality. -
Fast Response Time
Provides real-time data acquisition for high-speed process applications. -
Durability in Harsh Conditions
Engineered for extended use in industrial environments with high temperature and humidity. -
Easy System Integration
Fully compatible with existing TDC 3000 systems, reducing setup and configuration time. -
Diagnostic Capabilities
Built-in tools for detecting wiring faults and signal degradation help reduce downtime. -
Compact Form Factor
Its slim and lightweight design allows for high-density I/O installations.
Frequently Asked Questions (FAQ)
1. What is the primary function of the 621-4350R module?
It receives analog signals from field instruments and converts them into digital data for the TDC 3000 control system.
2. Can I use this module for both current and voltage signals?
Yes, it supports 4–20 mA current and 0–10 V voltage inputs, selectable via configuration.
3. Is each analog channel electrically isolated?
Yes, every channel is galvanically isolated to prevent cross-talk and ensure safe signal handling.
4. What control systems is it compatible with?
It is specifically designed for Honeywell’s TDC 3000 distributed control system.
5. How many channels does the module support?
It offers 8 independent analog input channels.
6. Is the module hot-swappable?
No, the module should be removed or installed with the system powered down to prevent damage.
7. How is the module mounted?
It is mounted in a chassis rack as part of the TDC 3000 I/O subsystem.
8. What kind of diagnostics are built in?
The module provides signal loss detection and wiring integrity diagnostics for each input channel.
9. Does the module require external cooling?
No, it is passively cooled by natural convection; external fans are optional.
10. What is the typical lifespan of the module?
Under standard operating conditions, the module typically lasts over 10 years.
Related Models (Same Series or Function)
| Model Number | Description | Input Type | System |
|---|---|---|---|
| 621-3580RC | Analog Input Module | 4–20 mA / 0–10 V | TDC 3000 |
| 621-3552RC | Multi-Channel Analog Input | Current/Voltage | TDC 3000 |
| 621-3560RC | Analog Input Module | Configurable Input | TDC 3000 |
| 621-3502 | Analog Input Module | Standard Analog | TDC 3000 |
| 621-3300 | Digital Input Module | Discrete Signals | TDC 3000 |
| 621-1100 | Diagnostic I/O Module | System Monitoring | TDC 3000 |
Popular Honeywell Modules (Same Brand)
| Model Number | Part Number | Function | System/Application |
|---|---|---|---|
| CC-TAIX01 | 51405038-375 | Analog Input Module | Experion C300 |
| CC-TDIL01 | 51405040-175 | Digital Input Module | Digital Control |
| CC-PAOH01 | 51405039-175 | Analog Output Module | Analog Actuator Control |
| CC-TDOD01 | 51405042-175 | Digital Output Module | Logic Output Devices |
| MC-TAMR03 | 80363969-150 | Multipoint Receiver Module | Field Signal Collection |
| CC-PDIL01 | 51405040-275 | Digital Input Module | Process Integration |
