There are still some products that have not been listed yet. For more information, please contact us. If the product model does not match the displayed picture, the actual model shall prevail. Please consult us for specific product images; We will arrange for the warehouse to take photos for confirmation. We have 76 shared warehouses worldwide, so it may take several hours to accurately respond to your message. We deeply apologize for any inconvenience caused to you. Of course, we will process your inquiry as soon as possible.

The ABB 1MRS050644 (also known as RTD1 or Signal Analog Input Module RTD1) is a specialized analog input module designed for ABB's legacy feeder terminals and protection relays in the REF 541/543/545 series (part of the RE_54x family). This module enables high-precision temperature measurement and analog signal acquisition from Resistance Temperature Detectors (RTDs), supporting applications in medium-voltage substation automation, feeder protection, motor monitoring, and industrial process supervision. The ABB 1MRS050644 integrates seamlessly as an optional expansion board in REF/REM/RET terminals, providing reliable RTD input channels for thermal overload protection, temperature-based supervision, and condition monitoring in power distribution, generation, and heavy industry environments. As a spare or replacement part for discontinued RE_54x series devices, the ABB 1MRS050644 ensures continued operation and accurate temperature data handling in existing installations.

Key technical specifications of the ABB 1MRS050644 (RTD1 module for REF 54_ series) include:

Function: Analog input module for RTD (Resistance Temperature Detector) signals

Supported RTD types: Typically Pt100, Ni100, Cu10 (common platinum, nickel, copper sensors; confirm per terminal configuration)

Number of channels: Multiple RTD inputs (often 6–8 channels depending on variant and terminal slot)

Measurement range: Standard for industrial RTDs (e.g., -200°C to +850°C for Pt100)

Accuracy: High precision with low drift, typically ±0.5% or better (including linearization and compensation)

Isolation: Galvanic isolation between channels and system for noise immunity and safety

Interfaces: Plug-in board connection to the main CPU module in REF 541/543/545 terminals

Power supply: Derived from host terminal (no separate external supply needed)

Operating temperature: Industrial range aligned with host device (typically -25°C to +55°C)

Additional features: Surge protection, EMC compliance (ANSI C37.90 or equivalent), self-supervision integration, support for temperature-based protection functions The ABB 1MRS050644 is supplied as a single plug-in module/board; it is a certification level 1 component and often listed as a spare part for RE_54x feeder terminals.

To operate the ABB 1MRS050644 effectively (within a REF 541/543/545 terminal):

Insert the ABB 1MRS050644 module into the designated RTD slot of the REF terminal (power down first; align connectors carefully).

Connect RTD sensors (e.g., Pt100) to the module terminals using shielded twisted-pair cables; follow polarity and wiring diagrams from the REF manual.

Power up the host REF terminal; verify no internal fault (IRF) alarm and check module recognition via HMI or PCM600 software.

Configure RTD channels in PCM600 or via local HMI: select RTD type, scaling, alarm/trip thresholds, and link to thermal overload or temperature supervision functions.

Monitor real-time temperature values on the HMI display or via communication (e.g., SPA-bus, IEC 60870-5-103).

Test functionality: Simulate temperature changes (e.g., via resistance substitution) and confirm accurate readings, starts/trips, and event logging.

In protection applications with the ABB 1MRS050644, verify integration with autoreclosing, interlocking, or condition monitoring features.

These steps enable precise temperature monitoring and protection using the ABB 1MRS050644.

Proper installation of the ABB 1MRS050644 requires careful handling:

Power down the entire REF terminal and discharge any stored energy before module insertion/removal.

Align the ABB 1MRS050644 precisely with the slot guides and connectors; avoid forcing to prevent pin damage.

Use shielded twisted-pair cables for RTD connections to minimize noise and EMI; ground shields at one end only.

Ensure correct RTD wiring polarity and sensor compatibility (e.g., 3-wire or 4-wire configuration for accuracy).

Follow ESD precautions (wrist strap, grounded workspace) when handling the sensitive analog board.

After installation, power up gradually and check self-supervision status; perform full functional testing per ABB REF 54_ commissioning manual.

Verify ambient conditions remain within the host terminal's ratings; protect from excessive dust, vibration, or humidity.

Refer to specific REF 541/543/545 technical documentation for the ABB 1MRS050644 slot assignment and wiring details.

Routine maintenance for the ABB 1MRS050644 supports long-term reliability:

Inspect weekly for dust on connectors, loose wiring, or signs of corrosion/heat damage.

Check daily REF terminal HMI or SCADA for RTD-related alarms, supervision warnings, or inaccurate readings.

Monitor temperature values for consistency; investigate deviations or sensor faults promptly.

Verify host terminal self-supervision includes the ABB 1MRS050644 module status (no IRF linked to analog inputs).

Clean connections gently with compressed air (power off); avoid liquids or abrasives.

Review event/disturbance records periodically for temperature-triggered events.

During outages, test RTD channels with known resistances and recalibrate if needed per ABB guidelines.

These practices help maintain accurate thermal monitoring in substation or industrial systems.

Do you provide global shipping services?

Yes. We have local distribution centers on all continents, which can quickly transport parts to any corner of the world.

2. What payment methods and currencies do you accept?

To make your purchasing process as simple as possible, we offer multiple payment methods including bank transfer, check, and PayPal. Meanwhile, we also accept most mainstream credit and debit cards, such as Visa, Mastercard, and American Express. We can accept payments in most major currencies worldwide, but we recommend using US dollars (USD), British pounds (GBP), or euros (EUR) as a priority. Payments in other currencies may incur additional fees. All transactions are securely processed by HSBC Bank and HSBC Merchant Services.

How many parts do you currently have in stock?

We have a vast inventory of thousands of new, refurbished, and outdated automation components, including products from well-known manufacturers such as ABB and Schneider. If you cannot find the required parts, please do not worry. We work closely with a global network of professional suppliers to provide you with tailored quotes even if the part is not listed on our website.

Who can I contact if I encounter any problems?

Our experienced customer service team will handle any issues after you place your order.