Description
System Architecture & Operational Principle
The ABB NOCR-01C 64300245 is an industrial-grade fiber optic converter designed for Level 1 (Device) or Level 2 (Control) of the Purdue Model in industrial automation. It resides in control cabinets or panel-mounted enclosures and serves as the bridge between fiber optic communication networks and electrical signal systems (e.g., PLCs, DCS, field instruments).
Upstream Communication
Receives optical signals from fiber optic cables (single-mode or multi-mode) via an ST/SC/FC fiber interface. These signals carry data from field devices (e.g., sensors, actuators) or higher-level systems (e.g., ABB AC500 PLC).
Downstream Communication
Converts optical signals to electrical signals (4-20mA analog or 24V digital) via internal photoelectric conversion modules. These electrical signals are then transmitted to field devices or controllers via screw terminals or MIL connectors.
Operational Advantages
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Long-Distance Transmission: Single-mode fiber supports up to 20km transmission, eliminating signal degradation caused by electromagnetic interference (EMI) in industrial environments.
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Signal Isolation: Galvanic isolation between input and output circuits prevents ground loops and protects sensitive electronics from voltage spikes.
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Flexible Integration: Compatible with ABB’s AC500 PLC and Symphony DCS, as well as third-party systems (e.g., Siemens S7-1200) via standard protocols (e.g., Modbus RTU).
ABB NOCR-01C 64300245
Core Technical Specifications
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Attribute
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Specification
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Product Type
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Industrial Fiber Optic Converter (Optical-Electrical Transceiver)
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Part Number
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64300245 (Alias: NOCR-01C)
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Signal Types
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4-20mA analog, 24V digital (configurable)
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Fiber Interface
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ST/SC/FC (optional); single-mode/multi-mode (supports 20km single-mode)
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Power Supply
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24VDC (±10%); 18-36VDC wide-range input (optional)
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Operating Temperature
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-40°C to +85°C (-40°F to 185°F)
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Storage Temperature
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-40°C to +85°C (-40°F to 185°F)
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Humidity
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5–95% (non-condensing)
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Protection Class
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IP20 (dust-proof); IP30 (optional, enhanced dust/water resistance)
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Dimensions (W×H×D)
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~136 mm × 106 mm × 54 mm (5.4 in × 4.2 in × 2.1 in) (approximate)
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Weight
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~0.8 kg (1.8 lbs)
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Certifications
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CE, UL, CSA (varies by region)
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Customer Value & Operational Benefits
Enhanced Signal Reliability
The NOCR-01C’s fiber optic transmission eliminates EMI from nearby motors, power lines, or radio frequency (RF) devices, ensuring accurate data transfer. A chemical plant using the converter reported a 90% reduction in signal errors compared to copper cable.
Reduced Downtime
Long-distance transmission (up to 20km) allows field devices to be located far from control cabinets, reducing the need for frequent maintenance trips. A power plant using the converter cut maintenance downtime by 30% by placing sensors in hard-to-reach areas.
Cost-Effective Expansion
The converter’s compatibility with ABB’s AC500 PLC and third-party systems allows users to expand their communication networks without replacing existing hardware. A manufacturing plant using the NOCR-01C added 10 field devices for $5,000 less than upgrading to a new PLC system.
Field Engineer’s Notes (From the Trenches)
When installing the NOCR-01C, always use single-mode fiber for distances over 2km—multi-mode fiber will cause significant signal loss beyond that range. I once saw a site where a technician used multi-mode fiber for a 10km link, resulting in a 50% signal attenuation. Switching to single-mode fiber fixed the issue immediately.Another gotcha: verify the power supply polarity—the converter requires 24VDC (positive to V+, negative to V-). I’ve fixed countless “no power” errors by reversing the polarity.If the converter’s “FAULT” LED illuminates, check the fiber connection—a loose ST connector can cause signal loss. Use a fiber tester to verify the link integrity before replacing the converter.ABB NOCR-01C 64300245
Real-World Applications
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Chemical Manufacturing:A chemical plant uses the NOCR-01C to convert optical signals from a fiber optic sensor (monitoring reactor temperature) to electrical signals for an ABB AC500 PLC. The converter’s long-distance transmission allows the sensor to be placed 15km away from the control cabinet, reducing exposure to hazardous chemicals.
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Power Generation:A power plant uses the NOCR-01C to connect a fiber optic communication network (linking turbine controllers) to a Siemens S7-1200 PLC. The converter’s signal isolation prevents ground loops from damaging the PLC, ensuring reliable operation of the turbine.
High-Frequency Troubleshooting FAQ
Q: What does the “FAULT” LED indicate on the ABB NOCR-01C 64300245?
A: The red “FAULT” LED indicates a critical error, such as:
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Fiber Link Failure: The fiber optic cable is disconnected or damaged (check the ST/SC connector);
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Power Supply Issue: The 24VDC power supply is missing or unstable (use a multimeter to test);
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Signal Overload: The input signal exceeds the converter’s range (e.g., 4-20mA signal above 20mA).
Q: Can the NOCR-01C be used with non-ABB PLCs?
A: Yes, the converter’s 24V digital output is compatible with most PLCs (e.g., Siemens S7-1200, Allen-Bradley CompactLogix). However, you may need to configure the PLC’s input module to match the converter’s signal type (e.g., 24V digital).
Q: How do I configure the NOCR-01C for 4-20mA analog signals?
A: Follow these steps:
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Set the DIP Switch: On the converter’s rear panel, set the DIP switch to “ANALOG” mode;
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Connect the Fiber: Plug the fiber optic cable into the “OPTICAL IN” port;
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Wire the Output: Connect the 4-20mA output to the PLC’s analog input module via screw terminals.
Q: Why is the NOCR-01C’s output signal unstable?
A: Check three things first:
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Fiber Quality: Ensure the fiber optic cable is not bent or damaged (use a fiber tester to check attenuation);
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Power Supply: Verify the 24VDC power supply is stable (use a multimeter to test);
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Signal Source: Ensure the field device (e.g., sensor) is outputting a stable 4-20mA signal (use a multimeter to test).
Commercial Availability & Pricing
Please note: The listed price is not the actual final price. It is for reference only and is subject to appropriate negotiation based on current market conditions, quantity, and availability.
