TB820V2-eA Modular Bus Trunk Modem  

1. Key Parameters

• Core Function: Bus signal amplification, long-distance transmission, and trunk network communication for industrial control systems
• Compatible Bus Protocols: Profibus-DP, Modbus RTU, ABB proprietary bus protocols (for 800xA system integration)
• Transmission Distance: Up to 1.2km (without repeaters, using twisted-pair cables); Extendable to 10km+ with cascaded repeaters
• Transmission Rate: 9.6kbps~12Mbps (auto-adaptive, matching the bus protocol’s rate range)
• Signal Amplification Gain: 20dB (typical, for compensating signal attenuation in long-distance transmission)
• Isolation Level: 2.5kVrms (bus port to power supply, bus port to backplane)
• Power Supply: 24V DC (±10% tolerance); Typical power consumption: ≤5W
• Operating Temperature Range: -25℃~+60℃
• Storage Temperature Range: -40℃~+85℃
• Communication Interfaces: 2× bus trunk ports (for daisy-chain connection), 1× backplane interface (for S800 I/O rack integration)
• Installation Method: 35mm standard DIN rail mounting (compatible with S800 I/O cabinet layouts)
• Protection Class: IP20 (module body); Complies with IEC 61000-6-2 (EMC immunity) and IEC 61010-1 (safety)

2. Product Features

• Long-Distance Transmission Optimization: Built-in high-performance signal amplification circuit compensates for attenuation in long-distance (up to 1.2km) bus transmission, avoiding data loss caused by weak signals.
• Strong Anti-Interference Capability: Integrates EMI/RFI filters (compliant with EN 61000-4-6) and galvanic isolation (2.5kVrms), effectively resisting industrial electrical noise (e.g., from motors, frequency converters) and ground loops.
• Modular & Scalable Design: Supports cascaded connection with multiple TB820V2-eA modems to extend bus network coverage beyond 10km, adapting to large-scale industrial sites (e.g., large factories, distributed power plants).
• Seamless 800xA System Integration: Optimized for ABB Advant 800xA and S800 I/O platforms, supporting online parameter configuration (via 800xA Engineering Studio) and real-time status monitoring (e.g., bus rate, signal strength).
• Plug-and-Play Deployment: No complex hardware configuration required; automatically matches the bus protocol and transmission rate of the connected network, reducing on-site commissioning time.
• Industrial Durability: Adopts flame-retardant ABS housing (UL94 V-0) and anti-vibration design (IEC 60068-2-6: 50Hz, 5g acceleration), ensuring stable operation in dusty, humid, or vibration-prone industrial environments.
• Intelligent Diagnostics: Equipped with LED indicators (power, bus communication status, signal strength) to visually display operating conditions; triggers fault alarms for abnormal bus signals, facilitating quick troubleshooting.

3. Application Fields

• Large-Scale Manufacturing Plants: Connects distributed S800 I/O modules across multiple production workshops (e.g., automotive assembly lines, semiconductor factories) via Profibus-DP bus.
• Process Industry: Enables long-distance communication between control cabinets and on-site I/O modules in chemical plants, oil refineries, and metallurgical facilities (e.g., connecting reactor sensors to central DCS).
• Energy Sector: Extends bus networks in wind farms (connecting turbine control modules to central monitoring systems) and photovoltaic plants (linking inverter I/O to SCADA systems).
• Water & Wastewater Treatment: Connects distributed I/O modules in large water treatment plants (e.g., pump stations, filtration units) to the central control system via Modbus RTU.
• Infrastructure Projects: Supports long-distance bus communication in smart grids (substation I/O to control centers) and large-scale building automation systems (distributed HVAC I/O to central BMS).

4. Precautions

• Before installation, confirm compatibility with the target bus protocol (e.g., Profibus-DP, Modbus RTU) to avoid communication failures.
• Use shielded twisted-pair cables (e.g., Profibus-specific cables) for bus trunk connections; connect the cable shield to the system’s protective ground (single-point grounding) to enhance anti-interference performance.
• Do not exceed the maximum cascading number (recommended ≤8 units) to prevent cumulative signal delay and ensure real-time data transmission.
• Ensure the power supply voltage is within the 24V DC ±10% range; overvoltage or undervoltage may cause module malfunctions or permanent damage.
• Avoid installing the modem near strong magnetic field sources (e.g., large transformers, high-power motors) or high-temperature heat sources (>60℃) to maintain signal stability.
• Regularly inspect bus port connections for tightness; loose connectors may cause intermittent communication or signal attenuation

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