Product Introduction

The 12HFA51A42H is a multi-contact auxiliary relay module manufactured and designed by General Electric for use in GE Speedtronic control systems. HFASl relays are momentary, hinged armature, multi-contact, auxiliary relays. They have six (6) electrically independent contact circuits suitable for circuit opening or circuit closing applications. This arrangement allows multiple operations to be performed simultaneously. HFASl relays are available in front or rear connection. Front connection relays are suitable for surface mounting only. Rear connection relays are suitable for mounting on steel flanges, where a cover is required.

The HFA51A relay is a self-resetting relay with a momentary de-energizing feature. The HFASlB relay is manually reset with a plunger assembly mounted through a transparent cover.
The HFASlS is similar to the HFASlA except that the (b) contact in position 3 is used with an external resistor to obtain an 8 millisecond pick-up time for high speed operation. The resistor 1s is carried by the (b) contact until the relay picks up. When the relay is picked up, (b) the contacts open and place the resistor in series with the relay coil.
Unless relays are ordered with a specific contact arrangement, they are shipped with six circuit closure contacts (code 60), except for the HFA51S, which is shipped with code 01 contacts. Code 01 is available only with the HFA51S. The HFASlS is not available with codes 51 and 60.
The coils of the HFASlA, HFASlB, and HFA51P relays are rated for standard voltages up to 575 volts at 25, 50, or 60 cycles, up to and including 250 VDC. The HFASlS relays are rated for DC voltages up to and including 250 VDC.
The HFA type relays are intended to be mounted on a vertical surface. Outline and panel drilling diagrams are shown in Figures 5, 6, and 7. Surface mounting on steel panels requires insulating sleeves for each terminal.

GE 12HFA51A42H auxiliary relay is a module designed for industrial automation. It plays an important role in multiple industries, especially in situations where high reliability and multi-functional integration are required. Here are some of the main functions of this relay:
Industrial Automation Control
GE 12HFA51A42H auxiliary relay is widely used in modern industrial fields such as power, oil, mines, ports, heating, gas, water supply, sewage treatment, metallurgy, papermaking, textiles, chemicals, water conservancy, etc. Its main functions include sequential control, ladder logic control, accident recall processing, digital-to-analog conversion, input/output signal processing, data communication and processing, etc.

High Reliability and Stability
Due to its design and manufacturing standards, GE 12HFA51A42H auxiliary relay can operate stably in harsh industrial environments, ensuring high availability and safety of the system. This is essential for critical infrastructure and continuous production processes.

Adapt to a variety of industrial environments
This relay is suitable for a variety of industrial environments, including but not limited to power, oil, mines, ports, heating, gas, water supply, sewage treatment, metallurgy, papermaking, textiles, chemicals, water conservancy and other fields. It is designed with specific needs of different industries in mind, such as high-availability control, asset management solutions, and intrinsically safe I/O in hazardous areas.

Supports Proficy operating system
The GE 12HFA51A42H auxiliary relay is compatible with the Proficy operating system, which enables customers to design and implement process control to meet specific needs. The Proficy process system provides a powerful distributed control system (DCS) that can improve operational performance and productivity and provide continuous support for the business.

Integration with other systems
The relay can be seamlessly integrated with other industrial control systems such as Allen-Bradley, Bently Nevada, ABB, Emerson Ovation, Honeywell DCS, Siemens, etc., and supports multiple control methods such as sequential control and ladder logic control.

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