Beckwith 35‑12‑635 (17607) Generator Protection Relay Keypad Interface

The Beckwith 35‑12‑635 is a keypad interface module designed for use with Beckwith generator protection relays. This unit, identified by part number 17607, provides local user access for viewing parameters, changing settings, and acknowledging alarms. It features a backlit LCD display and a tactile keypad for intuitive operation.

The interface connects to the relay via a standard serial communication link, allowing remote mounting up to several metres away from the relay chassis. This flexibility is useful for control room installations where the relay is mounted in a separate panel.

Key Features

• Backlit LCD with multiple lines and contrast control

• Numeric keypad with function keys

• Real‑time display of voltage, current, frequency, and status

• Local setting adjustment and password protection

• Alarm and trip annunciation with LED indicators

• Communication: RS‑232 or RS‑485

• Panel or desktop mounting kit included

Technical Specifications

Supply voltage: 5 VDC from relay or external 12 VDC; power consumption: < 2 W; display: 4 x 20 character LCD; keypad: 20 keys; communication: 9600 baud, 8‑bit; operating temperature: 0°C to +50°C; dimensions: 144 x 72 x 30 mm.

Applications

Used with Beckwith M‑3420, M‑3425, and other protection relays to provide a local human‑machine interface (HMI) for operators and technicians.

Installation and Connection

Mount the interface in a panel cutout or place on a desktop. Connect the communication cable to the relay’s serial port. Configure the baud rate and address matching the relay.

Reliability and Maintenance

The interface has solid‑state construction with long‑life LEDs and keypad. Periodic cleaning of the display and keypad is recommended.

Why Choose the 35‑12‑635?

This keypad interface provides a cost‑effective and convenient way to interact with Beckwith relays, reducing the need for a laptop or PC for routine adjustments.

In summary, the Beckwith 35‑12‑635 enhances the usability of generator protection relays, offering easy local access and monitoring.