Purchase now the 2080-SERIALISOL, a high-performance isolated serial communication plug-in module designed to enhance the connectivity and electrical resilience of Allen-Bradley Micro800 controllers. This module is the professional choice for industrial environments where ground potential differences or electrical noise pose a threat to serial data integrity.
What Is the 2080-SERIALISOL?
The 2080-SERIALISOL is an expansion plug-in module that provides a dedicated, electrically isolated serial port for Micro820, Micro830, Micro850, and Micro870 PLC systems. Supporting both RS232 and RS485 physical layers, this module allows for the integration of various industrial peripherals such as barcode scanners, weight scales, and Modbus RTU devices. The key advantage of the 2080-SERIALISOL is its 500V AC isolation barrier between the controller’s internal logic and the external serial network. This isolation prevents ground loops and protects the PLC processor from high-voltage transients that can occur in large-scale distributed systems. Its compact architecture fits directly into the front-facing plug-in slots, maintaining the PLC’s slim profile while providing industrial-grade communication flexibility.
Key Technical Specifications
- Communication Protocols: Modbus RTU (Master/Slave), ASCII
- Physical Interfaces: RS232 and RS485 (2-wire)
- Isolation Voltage: 500V AC
- Maximum Baud Rate: 38.4 Kbps
- Connection Type: 5-pin removable terminal block
- Compatibility: Micro820, Micro830, Micro850, Micro870
- Status Indicators: Transmit (TX) and Receive (RX) LEDs
- Power Consumption: 3.3V DC (50mA) / 24V DC (0mA)
System Integration and Noise Immunity
The 2080-SERIALISOL architecture is optimized for long-distance RS485 networks. In many factory environments, variable frequency drives (VFDs) and heavy motors generate significant electromagnetic interference (EMI). The isolation provided by this module ensures that the serial bus remains functional and that the PLC remains safe from common-mode noise. Within the Connected Components Workbench (CCW) software, the 2080-SERIALISOL is treated as an independent communication channel, allowing for complex messaging tasks to be handled in the background without affecting the primary control loop execution speed.
Expert Tips
When configuring the 2080-SERIALISOL for RS485 communication, ensure that you use a shielded twisted-pair cable and ground the shield at only one point to prevent noise injection. For RS485 networks exceeding 100 meters, it is vital to install a 120-ohm termination resistor at the last node of the bus to prevent signal reflections. If you are communicating with multiple Modbus slaves, consider increasing the «Reply Timeout» in the CCW software to account for the processing time of slower field devices, ensuring stable and reliable data exchange.
Frequently Asked Questions
Q: Can the 2080-SERIALISOL be used for RS422 communication?
A: No, the 2080-SERIALISOL is strictly designed for RS232 or 2-wire RS485. For 4-wire RS422, you would typically need a specialized converter or a different plug-in module.
Q: Does this module support DH-485 protocol?
A: No, the 2080-SERIALISOL is primarily used for Modbus RTU and generic ASCII messaging. It does not natively support the legacy DH-485 protocol used in older SLC 500 systems.
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