ALSTOM PIB1201A 3BEC0067 Interface Module

Overview

The PIB1201A interfaces with the host relay via a dedicated backplane or serial communication link. It provides a set of digital inputs for sensing external switchgear status (e.g., circuit breaker position, isolator status) and digital outputs for remote control of devices. The module also may include auxiliary communication ports for connecting to other IEDs or PLCs. The 3BEC0067 suffix indicates a specific variant with predefined I/O count and firmware.

Key Features

• Digital Inputs: 8 optically isolated inputs, wet/dry selectable (24-250 VDC).

• Digital Outputs: 6 form-C relay outputs (rated 8A / 250 VAC).

• Communication Port: RS485 with Modbus RTU protocol for remote I/O expansion.

• Status LEDs: Front panel LEDs for power, communication, and I/O status.

• Self-Powered: Derives power from the host relay or external auxiliary supply.

• Hot-Swappable: Can be installed or removed without powering down the relay.

• Compact Design: Low-profile housing suitable for mounting in standard relay cases.

Technical Specifications

• Auxiliary Supply: 24-250 VDC / 100-240 VAC (depending on variant).

• Digital Inputs: 8, 24-250 VDC, response time < 10 ms.

• Digital Outputs: 6, form-C, 8A @ 250 VAC / 30 VDC.

• Communication: RS485, Modbus RTU, baud rates up to 115200.

• Isolation: 2.5 kV between I/O and logic.

• Operating Temperature: -25°C to +70°C.

• Dimensions: Compact modular size (e.g., 60 x 120 x 120 mm).

• Mounting: DIN rail or panel mount (with adapter).

Applications

The PIB1201A 3BEC0067 is used to enhance the functionality of ALSTOM protection relays in various scenarios:

• Adding extra breaker status inputs to a feeder protection relay.

• Providing additional trip outputs for dual coil circuit breakers.

• Interfacing with auxiliary equipment such as tap changers or capacitor banks.

• Expanding I/O for transformer differential protection schemes.

• Acting as a remote I/O unit in distributed automation systems.

Configuration and Integration

The module is configured using the same software as the host relay, typically ALSTOM’s configuration tool. The digital inputs can be mapped to internal logic functions (e.g., blocking signals, interlocking), and the outputs can be assigned to alarm or trip conditions. The Modbus RTU interface allows the module to be used as a standalone I/O device if needed. Its robust design ensures reliable operation in harsh substation environments.

In summary, the ALSTOM PIB1201A 3BEC0067 interface module provides a cost-effective way to expand the I/O capacity of protection systems, improving flexibility and reducing wiring complexity.