ABB TK850V007 (Order Code: 3BSC95019R1) CEX Bus Terminator 

1. Key Parameters

• Product Model: TK850V007
• Order Code/Part Number: 3BSC95019R1 (unique identifier for procurement and legacy system compatibility)
• Core Function: Terminates CEX bus segments in Advant OCS systems; eliminates signal reflections, filters EMI, and stabilizes communication between controllers and I/O modules
• Bus Compatibility:
  • Target Bus Type: ABB proprietary CEX (Control Expansion) bus (used in Advant OCS for inter-module communication)
  • Supported Systems: Advant OCS controllers (e.g., MasterPiece 200/300), I/O modules, and peripheral devices
• Electrical Specifications:
  • Termination Resistance: 120Ω (fixed, matched to CEX bus characteristic impedance)
  • Signal Voltage Level: 0~5V DC (compatible with CEX bus logic levels)
  • Insulation Voltage: 1kVrms (between bus circuit and ground)
  • EMI Filtering: Integrated low-pass filter (cutoff frequency: 500kHz) to reduce high-frequency noise
• Mechanical Specifications:
  • Dimensions (W×H×D): 32mm × 175mm × 220mm (rack-mounted, fits Advant OCS standard I/O racks)
  • Mounting: Advant OCS dedicated CEX bus racks (compatible with 400-series enclosures)
  • Terminal Type: Screw terminals (accepts 0.5mm²~1.5mm² copper conductors; torque range: 0.5~0.8N·m)
  • Weight: Approximately 280g
• Environmental Ratings:
  • Operating Temperature Range: 0℃~+60℃ (32℉~140℉)
  • Storage Temperature Range: -20℃~+70℃ (-4℉~158℉)
  • Humidity Tolerance: ≤90% RH (non-condensing, 40℃)
  • Vibration Resistance: 5~500Hz, 1g acceleration (IEC 60068-2-6)
  • Shock Resistance: 20g acceleration (11ms duration, IEC 60068-2-27)
• Compliance Standards: IEC 61000-6-2 (EMC immunity for industrial environments), EN 60947-1 (low-voltage control equipment), UL 508 (industrial safety)

2. Key Features

• CEX Bus Impedance Matching: Fixed 120Ω termination resistance matches the characteristic impedance of ABB’s CEX bus, eliminating signal reflections that cause data corruption (e.g., bit errors, frame loss) in long bus segments (≥50m) typical in legacy industrial systems.
• Integrated Noise Filtering: Built-in low-pass filter suppresses high-frequency electromagnetic interference from industrial equipment (e.g., motors, transformers, inverters)—critical for maintaining communication integrity in noisy environments like manufacturing plants or refineries.
• Legacy System Compatibility: Designed exclusively for ABB Advant OCS CEX bus networks, ensuring seamless integration with existing controllers, I/O modules, and termination racks—no modifications required for legacy infrastructure.
• Rack-Mounted Design: Fits standard Advant OCS 400-series racks, maintaining the system’s modular architecture and simplifying installation in existing enclosures without requiring additional space.
• Robust Insulation: 1kVrms insulation between the bus circuit and ground prevents ground loops, a common issue in distributed legacy systems with multiple grounding points, which can disrupt communication.
• Clear Status Indicators: LED indicators for power and bus activity provide visual confirmation of proper operation, enabling quick troubleshooting of bus faults in systems lacking advanced diagnostic tools.
• Industrial Durability: Withstands the temperature range (0℃~+60℃) and vibration typical of legacy industrial environments, ensuring reliable performance in older facilities where environmental control may be limited.

3. Application Fields

• Advant OCS Legacy Systems: Terminates CEX bus segments in chemical, petrochemical, and power plants using ABB Advant OCS, maintaining communication between MasterPiece controllers and I/O modules.
• Industrial Process Control (Legacy): Stabilizes CEX bus communication in older manufacturing lines, water treatment plants, and mining operations—supporting critical control functions without requiring full system upgrades.
• Power Generation Auxiliary Systems: Used in legacy thermal power plants to terminate CEX bus links between control modules and auxiliary equipment (e.g., pumps, fans, valves).
• Oil & Gas Midstream Infrastructure: Maintains CEX bus integrity in older pipeline monitoring and pumping stations, ensuring reliable data transmission between sensors and control systems.
• Food & Beverage Batch Lines: Terminates bus segments in legacy batch processing systems (e.g., dairy, brewing) where Advant OCS controls temperature, mixing, and filling operations.

4. Precautions

• System Compatibility: Use exclusively with ABB Advant OCS CEX bus networks. Third-party terminators or use in non-CEX systems will mismatch impedance, causing signal degradation.
• Termination Placement: Install only at the end of CEX bus segments. Mid-segment termination disrupts signal flow, while missing end termination causes reflections and communication errors.
• Impedance Integrity: Do not modify the fixed 120Ω resistor. Damage or alteration will break impedance matching, rendering the terminator ineffective and risking bus failure.
• Grounding Requirements: Connect the ground terminal to the system’s common ground (≤1Ω resistance). Poor grounding reduces EMI filtering effectiveness and increases susceptibility to noise.
• Wiring Guidelines: Use shielded twisted-pair cables (0.5mm²~1.5mm²) for CEX bus connections. Route bus cables away from high-voltage power lines (≥30cm spacing) to minimize interference.
• Environmental Protection: Install in a sealed Advant OCS rack enclosure in harsh environments. Avoid exposure to corrosive gases, excessive dust, or temperatures beyond 0℃~+60℃.
• Legacy Support Considerations: As a legacy component, spare availability may be limited. Maintain spare units for critical systems or consult ABB for migration strategies to modern bus systems if long-term support is needed