Phoenix Contact MCR-C-UI-UI-DCI – Universal Isolation Amplifier | MCR Signal Conditioner Platform
Engineering Background
In industrial process control, ground loops and common-mode interference are among the most persistent sources of measurement error. The Phoenix Contact MCR-C-UI-UI-DCI was engineered to eliminate these issues by providing 3-way galvanic isolation between input, output, and power supply — a fundamental requirement in any DCS, PLC, or SCADA architecture where field instruments must communicate with control systems across different potential references.
Product Positioning
The MCR-C-UI-UI-DCI is a DIN-rail-mounted, universal signal conditioner designed for procurement engineers who need a reliable, compact, and standards-compliant isolation amplifier for analog signal conversion. It accepts universal current/voltage inputs (UI) and delivers a configurable current/voltage output (UI) with DC isolation (DCI), making it a versatile drop-in solution across a wide range of process industries.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | MCR-C-UI-UI-DCI |
| Manufacturer | Phoenix Contact |
| Product Series | MCR (Measurement, Control, Regulation) |
| Function | Isolation Amplifier / Signal Conditioner |
| Input Signal | Universal: 0–20 mA / 4–20 mA / 0–10 V / 0–5 V (configurable) |
| Output Signal | Universal: 0–20 mA / 4–20 mA / 0–10 V / 0–5 V (configurable) |
| Isolation Type | 3-way galvanic isolation (Input / Output / Power) |
| Isolation Voltage | ≥ 1500 V AC (input–output–power) |
| Supply Voltage | 24 V DC (19.2–30 V DC) |
| Power Consumption | ≤ 1.5 W |
| Accuracy | ≤ 0.1% of full scale |
| Temperature Range (Operating) | -25°C to +60°C |
| Temperature Range (Storage) | -40°C to +85°C |
| Mounting | DIN rail (EN 60715 / 35 mm) |
| Housing Width | 6.2 mm (ultra-slim) |
| Protection Class | IP20 |
| Certifications | CE, UL, cUL, ATEX (Ex II 3G), GL |
| Output Load (Current) | ≤ 600 Ω |
| Output Load (Voltage) | ≥ 2 kΩ |
| Response Time | ≤ 100 ms (10–90%) |
| Weight | Approx. 100 g |
| Country of Origin | Germany |
Proven Application Environments
- Process Automation (DCS/PLC): Isolating 4–20 mA transmitter loops from PLC analog input cards to prevent ground loop interference and protect sensitive I/O modules.
- Oil & Gas / Petrochemical: ATEX-rated variant suitable for Zone 2 hazardous area signal conditioning between field instruments and control rooms.
- Power Generation & Utilities: Isolating current/voltage signals across high-potential-difference environments (e.g., generator monitoring, substation SCADA).
- Water & Wastewater Treatment: Reliable signal transmission from remote field sensors (flow, level, pressure) to centralized SCADA systems.
- Building Automation (BAS/BMS): Conditioning analog signals from HVAC sensors and actuators for BMS controllers.
- Machine Building & OEM: Compact 6.2 mm width enables high-density DIN rail assemblies in control cabinets with limited space.
Engineering Advantages
- 3-Way Galvanic Isolation: Eliminates ground loops and common-mode noise — the root cause of most analog signal errors in industrial environments.
- Universal I/O Configuration: Single SKU covers 0–20 mA, 4–20 mA, 0–10 V, and 0–5 V — reduces spare parts inventory and simplifies procurement.
- Ultra-Slim 6.2 mm Housing: Maximizes DIN rail density; a 1-meter rail can accommodate 160+ modules side by side.
- High Accuracy (≤ 0.1% FS): Meets the precision requirements of process control loops where signal fidelity directly impacts product quality or safety.
- Wide Supply Voltage Tolerance (19.2–30 V DC): Compatible with standard 24 V DC plant power supplies without additional regulation.
- ATEX Certification: Enables deployment in Zone 2 hazardous areas without additional safety barriers in many configurations.
- Plug-in Screw Terminals: Allows module replacement without rewiring — critical for minimizing downtime during maintenance.
System Architecture & Signal Flow
The MCR-C-UI-UI-DCI operates as a transparent signal repeater with galvanic isolation. The signal path is:
Field Instrument → [UI Input] → Isolation Barrier (1500 V AC) → [UI/DCI Output] → PLC/DCS Analog Input Card
- Input side: Connects to field transmitters (2-wire, 3-wire, or 4-wire) or sensor outputs.
- Isolation stage: Transformer-based galvanic isolation eliminates all electrical continuity between input and output circuits.
- Output side: Delivers a clean, isolated analog signal to the control system. DCI (DC Isolated) output ensures no common reference between source and destination.
- Power supply: Independently isolated from both input and output — true 3-way isolation architecture.
Sourcing & Quality Verification
- Authorized Supply Chain: Konmask.com sources Phoenix Contact MCR series modules through verified industrial distribution channels. All units are inspected for authenticity before dispatch.
- Genuine Product Guarantee: Each MCR-C-UI-UI-DCI ships with original Phoenix Contact packaging, datasheet, and traceable batch documentation upon request.
- Counterfeit Risk Mitigation: Phoenix Contact products are frequently counterfeited. Purchasing through Konmask.com ensures you receive factory-genuine components with full CE/UL certification validity.
- Inspection & Testing: Functional verification available on request for bulk orders (>10 units). Certificate of Conformance (CoC) available.
Procurement Process
- Lead Time: In-stock units ship within 1–3 business days. Out-of-stock orders: 7–21 business days depending on origin warehouse.
- Minimum Order Quantity (MOQ): 1 unit. Volume pricing available for orders of 5+ units.
- Export Compliance: HS Code 8543.70 (Electronic integrated circuits / signal conditioners). Export documentation available for international shipments.
- Payment: T/T, PayPal, credit card, and trade finance options available for qualified buyers.
- RFQ for Large Orders: Contact [email protected] with quantity, delivery address, and required delivery date for a formal quotation within 24 hours.
Technical FAQ
Q: Can the MCR-C-UI-UI-DCI be used with HART signals?
A: The standard MCR-C-UI-UI-DCI passes the 4–20 mA DC component but may attenuate the HART FSK signal (1200/2200 Hz). For HART-transparent isolation, specify the MCR-C-UI-UI-DCI-HART variant.
Q: Is external configuration required for input/output range selection?
A: Yes. Input and output ranges are set via DIP switches on the module face. Refer to Phoenix Contact datasheet 2814606 for switch configuration tables.
Q: What is the maximum cable length supported on the input side?
A: Phoenix Contact recommends shielded cable for runs >10 m. For current loop inputs (4–20 mA), cable resistance up to 600 Ω total loop resistance is supported.
Q: Can multiple MCR-C-UI-UI-DCI modules share a common 24 V DC bus?
A: Yes. Modules can be powered from a common 24 V DC rail. Each module draws ≤ 1.5 W, so a 10-module group requires a minimum 15 W / 0.63 A supply capacity.
Q: Is this module suitable for SIL-rated safety loops?
A: The standard MCR-C-UI-UI-DCI is not SIL-certified. For functional safety applications (SIL 2/3), refer to the Phoenix Contact MCR-SL or MACX series with IEC 61508 certification.
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