8 Terminal Relay Manufacturers in 2023
This section provides an overview for terminal relays as well as their applications and principles. Also, please take a look at the list of 8 terminal relay manufacturers and their company rankings.
Table of Contents
What Is a Terminal Relay?
A terminal relay is used as interface devices that relay I/O loads, such as I/O of PLCs (programmable controllers) and solenoid valves.
The main structure of a terminal relay, which play the role of this I/O interface device, is a terminal block on a pedestal with a built-in printed circuit board, and multiple independent, single-pole, compact relays can be mounted on this pedestal, depending on the application, thus contributing to the compact relay structure while ensuring easy maintenance. This contributes to the miniaturization of equipment and reduced wiring.
Uses of Terminal Relays
Application Example 1: Compact Interface Devices That Relay Input/Output Loads
Terminal relays are used in compact interface devices that relay I/O loads such as I/O of PLCs (programmable controllers) and solenoid valves, and are used as very important electronic components in everything from home appliances to production facilities that use electricity. They are used as very important electronic components in everything from electrical appliances to production equipment.
Application Example 2: Compactification of Complicated Control Wiring, Etc.
Terminal relays are also used to downsize control wiring in increasingly sophisticated equipment and production facilities.
Principle of Terminal Relays
Terminal relays generally consist of a terminal block with a built-in printed circuit board and multiple small, single-pole relays that can be used in parallel.
These single-pole type miniature relays can also be paralleled according to the purpose of control, so you can choose from 1-pole, 4-pole, 8-pole, and 16-pole types of terminal blocks with built-in printed circuit boards.
Terminal Relays Are Broadly Classified Into Non-contact and Contact Relays
Relays used in terminal relays can be broadly classified into two types: "contact relays," which transmit signals mainly through mechanical opening and closing, and "non-contact relays," which transmit signals through electrical circuits such as semiconductors or SSRs (solid-state relays) without mechanical contact points.
These "with-contact relays" and "no-contact relays" include "a-contact" relays with normally open circuits and "b-contact" relays with normally closed circuits, which are used according to the purpose of relay control.
Be careful to select between a 2-element "thyristor" and a 1-element "triac."
When using SSR as a semiconductor switching element in a no-contact relay, there are two types of elements: a two-element "thyristor" and a one-element "triac." Therefore, care should be taken when selecting a thyristor or a triac.
List of 8 Terminal Relay Manufacturers
*Including some distributors, etc.
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- Year Founded: oldest first
- Year Founded: earliest first
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- United States of America
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Rockwell Automation
Terminal Block Relays
Company Overview
Rockwell Automation, Inc. was founded in 1903 and is headquartered in Milwakee, WI. Rockwell Automation provides industrial automation and digital transformation solutions around the world. Rockwell Automation operates through their intelligent devices, software & control, and lifecycle services segments with both hardware and software products and services. The Intelligent Devices segment offers drives, motion, safety, sensing, industrial components, and configured-to-order products. The Software & Control segment provides control and visualization software and hardware, information software, and network and security infrastructure solutions. The Lifecycle Services segment provides consulting, professional services and solutions, and connected and maintenance services through independent distributors.
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Panasonic Industry Co., Ltd.
RT-3 UNIT RELAY 4-POINT TERMINAL (PhotoMOS Power type)
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Eaton
Terminal block relays
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Terminal Relay Manufacturer Ranking
*Including some distributors, etc.Number of Employees
- PHOENIX CONTACT: 20,300
- Beckhoff Automation: 872
Newly Established Company
- ASI: 1999 (24 years ago)
- Beckhoff Automation: 1980 (43 years ago)
- c3controls: 1976 (47 years ago)
Company with a History
- Rockwell Automation: 1903 (120 years ago)
- PHOENIX CONTACT: 1923 (100 years ago)
- Omega Engineering,Inc: 1962 (61 years ago)
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