Configured for serial data transmission in AC 800F distributed control systems, the ABB FI820F (FI820F Communication Module) provides direct physical execution of dual-channel Modbus and PROFIBUS DP protocol interfacing.

Model Identification

• Model: FI820F

• Module Type: Serial Communication Module

• System Family: AC 800F Series

Hardware Specifications

Industrial Control Integration

The FI820F supports backplane bus communication velocity parameters compatible with PM 802F and PM 803F controller units. The module enables I/O density scaling by facilitating protocol conversion for intelligent field devices within the DCS architecture. Firmware flash compatibility is maintained through the primary controller interface, ensuring the serial communication stack remains synchronized with system-level process requirements.

Ordering Information

• One (1) FI820F Communication Module.

• Mounting clip for standard DIN rail installation.

• Technical interface and safety compliance documentation.

Field Installation Guidelines

• Mounting: Secure the module onto a standard DIN rail; ensure the mechanical locking mechanism is engaged to maintain contact with the system bus.

• Grounding: Verify that the 2500 V DC isolation barrier is maintained by strictly adhering to the specified cabinet shielding and grounding practices.

• Wiring: Terminate serial cables according to Modbus or PROFIBUS DP wiring standards; use shielded twisted-pair cabling to minimize susceptibility to electromagnetic noise.

• Termination: Ensure proper line termination resistors are installed at the end of the PROFIBUS bus segments to prevent signal reflections.

Frequently Asked Questions

• Is the FI820F hot-swappable? No. Power must be removed from the AC 800F subrack before inserting or removing the module to avoid damage to the backplane interface.

• Does it support both Modbus and PROFIBUS? Yes, the module is designed to handle both protocols, selectable through controller configuration.

• What is the purpose of the 2500 V isolation? This high-voltage barrier protects the internal controller logic from surges and common-mode noise present on field-level serial lines.

• Can it operate in extreme temperatures? Yes, the hardware is rated for operation from -40 deg C to +70 deg C in non-condensing environments.

• Does the module require external power? It draws operational power from the AC 800F backplane; no external power supply is required for the module itself.

• How are network faults identified? The module includes status indicators; check the AC 800F diagnostic software to pinpoint specific protocol or hardware fault flags.

• Is it compatible with all AC 800F controllers? It is designed for use with the AC 800F series, specifically validated for operation with PM 802F and PM 803F base units.

• How do I update the communication firmware? Updates are managed via the central controller’s engineering software, which deploys the necessary drivers to the module.