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　　PM645B 3BSE010535R1 Other names

　　Processor unit PM645B 3BSE010535R1

　　PM645B 3BSE010535R1 Control unit

　　Communication unit PM645B 3BSE010535R1

　　Module model: PM645B 3BSE010535R1

　　Series: AC 800M series controller

　　Core functions:

　　Profibus-DP master station: supports PROFIBUS-DPV0/V1 protocol, and can be used as a master station to connect distributed I/O or drive devices.

　　Communication capability:

　　1 DP interface, with a maximum of 32 slaves (expandable to 125 with repeaters).

　　Maximum communication distance 1000 meters, IO process data input/output 1400 bytes each, total 2800 bytes.

　　Compatibility: Applicable to ABB System 800xA 6.0.2 and above, and must be used with Compact Control Builder 6.0.0-1.

　　Technical specifications detailed explanation

　　Brand: ABB

　　Model: PM645B 3BSE010535R1 

　　Protocol support: PROFIBUS-DPV0/V1

　　Interface: 1 DP interface (RJ45)

　　Slave station support: Maximum 32 (extended to 125 with repeater)

　　Communication distance: 1000 meters (without repeater), support repeater expansion

　　Data capacity: 1400 bytes for input/output, 2800 bytes in total

　　Working environment: IP20 protection level, working temperature -20℃ to 60℃, humidity 5%-95% without condensation

　　Power supply: baseboard power supply (need to cooperate with TP830 baseboard)

　　Profibus communication core role

　　PM645B 3BSE010535R1  module is a key component of ABB 800xA control system, supporting Profibus DP protocol, can be used as a master or slave to achieve high-speed data exchange with automation equipment (such as PLC, inverter, sensor, etc.).

　　Its core functions include:

　　High-precision communication: supports Profibus DP protocol, with a communication rate of up to 12Mbps, ensuring real-time performance.

　　Multi-node support: a single network segment can connect up to 32 nodes (without repeaters), which can be expanded to 126 nodes after using repeaters.

　　Diagnosis and monitoring: provides module status indicator (DIAG light) and diagnostic data register, supporting real-time fault monitoring.

　　Technical advantages

　　Modular design: The compact structure is easy to integrate into the ABB 800xA rack, supports hot swapping, and simplifies the maintenance process.

　　Compatibility: Compatible with other components of the ABB 800xA system (such as controllers, I/O modules), and supports interconnection with third-party devices (such as Siemens and Omron PLCs) through the Profibus protocol.

　　Reliability: Industrial-grade hardware design is used to adapt to harsh environments (temperature range -25℃ to 70℃, vibration resistance level IEC 60068-2-6).

　　Application scenarios

　　Application scenarios and configuration guide

　　Typical application scenarios

　　Industrial automation production line: In the fields of automobile manufacturing, packaging machinery, etc., servo drives and sensors are connected through Profibus to achieve precise motion control.

　　Process control system: In the chemical and metallurgical industries, inverters, valves and other equipment are connected to achieve real-time monitoring and adjustment of process parameters.

　　Distributed I/O system: Expand I/O points through Profibus slave modules (such as ET 200M) to reduce wiring costs.

　　Configuration steps

　　Hardware installation:

　　Insert the module into the ABB 800xA controller rack to ensure that the connector is secure.

　　Use RS-485 twisted pair to connect the Profibus network, and set the terminal resistance to 120Ω (terminal resistance must be enabled at both ends of the network).

　　Software configuration:

　　Create a Profibus communication driver through the ABB 800xA System Manager tool and select the "PROFIBUS DP" protocol type.

　　Configure module parameters (baud rate, device address) and import the device GSD file (such as the GSD file of Siemens ET 200M).

　　Map the input/output data area, for example, map the 16-byte input data of the Profibus slave to the controller memory address 0x0000.

　　Compatibility and scalability

　　Compatible device list

　　ABB devices: AC800M controller, DI831 digital input module, DO821 digital output module.

　　Third-party devices: Siemens ET 200M, Omron NJ series PLC, Schneider M340 PLC.

　　Expansion solution

　　Multi-master system: Profibus master redundancy is achieved through ABB 800xA's redundant controller to improve system availability.

　　Mixed protocol network: Combine Profibus DP and Ethernet/IP protocols to achieve cross-protocol communication through ABB's Link module.

　　Installation and configuration

　　Hardware installation:

　　Insert TP830 baseboard and connect CEX bus expansion cable (TK850).

　　Configure memory backup battery (4943013-6).

　　Software configuration:

　　Use Compact Control Builder 6.0.0-1 or higher to set Profibus network parameters.

　　Configure master station address and slave station device mapping to ensure accurate data exchange.

　　Troubleshooting:

　　Communication interruption: Check DP cable connection and use ABB diagnostic tool to detect signal strength.

　　Power supply abnormality: Verify baseboard power supply voltage (24V DC) and check battery status.

　　Communication interruption (DIAG light red):

　　Reason: Profibus line is open, terminal resistor is not set, device address conflict.

　　Handling: Check the line connection, use a multimeter to measure the bus voltage (normal range is 0.8V to 4.2V); scan the device address through the System Manager tool and modify the conflicting address.

　　Data transmission error:

　　Reason: Baud rate mismatch, GSD file error.

　　Handling: Confirm that the baud rate of all devices is consistent (such as 1.5Mbps); re-import the official GSD file and avoid using third-party files.

　　Maintenance suggestions

　　Regular inspection: Check the tightness of the Profibus connector every quarter, and use a network analyzer (such as ProfiTrace) to monitor the signal quality.

　　Backup configuration: Export the module configuration file through System Manager for quick recovery.

　　Summary

　　As the Profibus communication core of the ABB 800xA system, the PM645B 3BSE010535R1 module plays a key role in the field of industrial automation with high reliability, easy configuration and strong compatibility. Its fault self-diagnosis capability and ABB's full range of technical support ensure the high availability and low maintenance cost of the system.

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