ALSTOM N897164610L Communication Interface Module

Overview

This module mounts directly onto compatible ALSTOM relays or can be installed as a stand-alone unit in a control cabinet. It provides electrical isolation and protocol conversion, allowing the relay to communicate over long distances using RS485 multi-drop networks. The N897164610L supports Modbus RTU protocol, which is widely used in utility and industrial automation. It also includes diagnostic LEDs for power and communication status, simplifying troubleshooting.

Key Features

• Serial Communication Ports: One RS232 port (local configuration) and one RS485 port (network communication).

• Protocol Support: Modbus RTU (master/slave) and ASCII modes.

• Galvanic Isolation: 2.5 kV isolation between communication ports and relay circuitry.

• Data Rate: Up to 115200 baud, software selectable.

• LED Indicators: Power, TX, RX, and fault indication.

• Compact Design: Low-profile housing for easy installation in relay cases or DIN rail.

• Wide Power Supply Range: 24-250 VDC / 100-240 VAC (optional).

Technical Specifications

• Power Supply: Derived from host relay backplane or external 24 VDC.

• Communication Interfaces: RS232 (DB9) and RS485 (screw terminals).

• Protocols: Modbus RTU/ASCII, transparent mode.

• Isolation Voltage: 2500 Vrms for 1 minute.

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

• Dimensions: 50 x 100 x 120 mm (approx.).

• Mounting: Snap-on DIN rail or panel mount.

Applications

The N897164610L is used to enable remote monitoring and control of ALSTOM protection relays in various scenarios:

• Integrating feeder protection relays into substation SCADA.

• Connecting transformer differential relays to plant DCS.

• Building multi-drop networks of IEDs for data concentrators.

• Providing a local configuration port for engineers.

Configuration and Integration

Configuration is performed using DIP switches or via software commands from the host relay. The module can be set to slave or master mode, with configurable slave ID, baud rate, and parity. It is compatible with most ALSTOM relays that have an expansion port. Once installed, it automatically passes through communication data, allowing the relay to appear as a standard Modbus device on the network. The N897164610L enhances the interoperability of protection systems, reducing engineering effort and cabling costs.

In summary, the ALSTOM N897164610L communication interface module is an essential accessory for modernizing and connecting protection relays to higher-level automation systems, ensuring reliable data exchange and system visibility.