| Customization: | Available |
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| Type: | Network Type |
| Measuring Medium: | Temperature |
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Rosemount 644 Rail-Mounted Temperature Transmitter
The Rosemount 644 Rail-Mounted Temperature Transmitter is a state-of-the-art solution designed for precise and reliable temperature measurement in industrial applications. Engineered by Emerson, this transmitter integrates advanced sensing technology with robust construction to deliver high accuracy across a wide range of process conditions. It supports various temperature sensor inputs, including RTDs (Resistance Temperature Detectors) and thermocouples, and converts these signals into standardized 4-20 mA or digital outputs for seamless integration with control systems. The device is optimized for DIN rail mounting, offering a compact and space-efficient design that simplifies installation in control cabinets or panels. Built to withstand harsh environments, the Rosemount 644 features exceptional durability, with certifications for hazardous areas (ATEX, IECEx, FM) and compliance with global safety standards. Its user-friendly interface, combined with diagnostic capabilities, enables proactive maintenance and reduces downtime, making it ideal for industries such as oil and gas, chemical processing, power generation, and pharmaceuticals.
Technical Excellence and Application Versatility
The Rosemount 644 excels in delivering unmatched measurement accuracy, with a typical precision of ±0.1% of span, ensuring reliable data for critical processes. Its advanced signal conditioning technology minimizes errors caused by electrical noise, temperature fluctuations, or sensor degradation. The transmitter supports HART® 7 communication protocols, allowing for remote configuration, real-time monitoring, and diagnostics via compatible software tools like AMS Device Manager. Additionally, its modular design enables easy customization with optional features such as isolated outputs, LCD displays, and custom scaling. The device's robust construction includes a high-impact polymer housing and corrosion-resistant materials, ensuring longevity in extreme temperatures (-40°C to 85°C ambient) and humid or corrosive environments. With its global certifications and compatibility with industry-standard communication protocols like Foundation Fieldbus and PROFIBUS PA, the Rosemount 644 is a versatile choice for modern automation systems. Its ability to enhance process efficiency, reduce calibration cycles, and improve operational safety makes it a cornerstone in temperature measurement solutions worldwide.
| Description |
Details |
| Product Overview |
Rosemount 644 Rail Temperature Transmitter is designed for rail-mounted installation, providing accurate temperature measurement in industrial environments. Compatible with various RTD and thermocouple sensors. Key features include HART communication, LCD display, and robust construction. |
| Safety Precautions |
- Verify power supply matches 10.5-55 VDC. - Ensure proper grounding. - Disconnect power before wiring. - Avoid exposure to corrosive substances. - Follow local electrical codes. |
| Unboxing & Components |
Included items: - Rosemount 644 Transmitter - Terminal block - Installation manual - Rail mounting clip - Certification documents - Optional: explosion-proof housing (if ordered). |
| Mounting |
1. Attach DIN rail clip to transmitter. 2. Snap transmitter onto 35 mm DIN rail. 3. Tighten mounting screw to 0.9 N·m torque. 4. Ensure vertical orientation for optimal heat dissipation. |
| Wiring Connections |
Terminal Block Layout (TB1): - Terminals 1-2: Sensor input (RTD/TC) - Terminals 3-4: Power supply (10.5-55 VDC) - Terminals 5-6: HART communication (optional) Use shielded twisted-pair cables for sensor connections. Max wire length: 100 meters. |
| Sensor Configuration |
1. Remove front cover using 3 mm hex key. 2. Set DIP switches (SW1) per sensor type: - RTD: Set to Pt100, Pt500, or Pt1000 - Thermocouple: Select J/K/T/E/R/S/B type 3. Verify jumper settings for 2/3/4-wire RTD connections. |
| Power Up & Initialization |
1. Apply 24 VDC power. 2. Wait 15 seconds for initialization. 3. LCD displays sensor type, temperature value, and status code. Normal status: "OK". |
| LCD Interface Navigation |
Button Functions: - MODE: Cycle through parameters - UP/DOWN: Adjust values - ENTER: Confirm selection Display Modes: - Primary: Process temperature - Secondary: Output current/percentage |
| HART Communication Setup |
1. Connect HART modem to terminals 5-6. 2. Use Rosemount 375/475 Field Communicator or AMS Suite. 3. Device address: Set to 0 for single-device networks. 4. Configure: - PV units (°C/°F/K) - Damping time (0-60 sec) - Fail-safe mode (upscale/downscale) |
| Calibration Procedure |
1. Access calibration menu via HART device. 2. Apply known temperature reference. 3. Select "Trim Sensor" for sensor calibration. 4. Select "Trim Output" for 4-20 mA adjustment. 5. Follow on-screen prompts to complete trimming. |
| Range Configuration |
Using HART Communicator: 1. Set LRV (Lower Range Value) 2. Set URV (Upper Range Value) Example: 0°C (4 mA) to 200°C (20 mA) Note: Must match DIP switch sensor type selection. |
| Diagnostics & Troubleshooting |
Common Error Codes: - E001: Sensor open circuit - E002: Sensor short circuit - E003: Out of range - E004: Configuration error Corrective Actions: - Verify sensor connections - Check DIP switch settings - Confirm input within sensor specification |
You may have this questions
Q: How long will you give me the reply?
A: We will reply to you as soon as we see the information
Q: What is the delivery time?
A:The products in stock will be shipped after receiving the payment, and the products that
need to be ordered are subject to the factory time.
Q: How about your package?
A: Do not worry about the package, we have rich experience in packing.
Q: How about the payment terms?
A:You can choose T/T.
Q: What is the MOQ?
A:1PC.
Q: Can l get a lower price if l order large quantities?
A: Yes, cheaper prices with more bigger size orders.
Q:After sales and warranty?
A: We provide one year warranty lifetime technical support services.
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