Different kinds of time relays and switches are used in industrial technology and building management to make things run more smoothly and safely. In the sections that follow, we'll look at six main groups of these devices, each with its own set of features, uses, and potential to improve your electrical setups.
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Single-function time relays are designed to perform a specific timing function, such as delay-on or delay-off, without the complexity of multiple settings. These are typically DIN rail-mounted, making them easy to integrate into standard electrical panels.
These relays are perfect for simple automation tasks where only one function is required. Common applications include lighting control, motor start delays, and simple HVAC automation.
Single-function relays offer reliability and ease of use in scenarios where complex programming is unnecessary. They are ideal for small-scale projects or where cost-effectiveness is a priority without compromising on performance.
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| CRM-48 | CRM-2HE | CRM-2T | CRM2HEUNI+2xPOC |
| 35.55 € | 52.42 € | 38.22 € | 72.84 € |
| - Emergency light testing with automatic cycle - Single SPDT contact (16A) - Wide time range: 10 minutes to 180 minutes |
- Asymmetric flasher with independent ON/OFF time - 2 SPDT contacts (16A) - Wide time range: 0.1s to 100 days |
- Star/Delta timing with adjustable time - 2 SPDT contacts (16A) - Wide time range: 0.1s to 100 days |
- External potentiometer control - Multi-function relay with 10 functions - Wide time range: 0.1s to 100 days |
Multi-function time relays are versatile devices that can perform various timing functions, such as on-delay, off-delay, interval timing, and more. These are also DIN rail-mounted, allowing for seamless integration into electrical systems.
These relays are widely used in industrial automation, where different timing functions might be required within a single process. Applications include complex lighting systems, sequential motor controls, and safety circuits.
The flexibility of multi-function time relays makes them a valuable asset in dynamic environments where operational requirements might change. Their adaptability allows engineers to tailor the relay functions to specific needs, reducing the need for multiple single-function relays.
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| CRM-91H | CRM-93H | CRM-161 | |
| 37.32 € | 37.02 € | 30.03 € | |
| - Multi-function relay with 10 functions - Universal power supply (AC/DC 12-240V) - Wide time range: 0.1s to 10 days |
- Multi-function relay with 10 functions - High current handling: 3x CO contacts (8A) - Wide time range: 0.05s to 30 days |
- Multi-function relay with 10 functions - Wide time range: 0.1s to 10 days - Compact size for DIN rail mounting |
Multi-function time relays housed in BOX enclosures are designed for situations where DIN rail mounting isn't possible or where the relay needs to be mounted in a specific location. These relays still offer a variety of timing functions similar to their DIN-mounted counterparts.
These relays are often used in retrofit projects or in installations where space constraints or environmental factors require an enclosed device. They are ideal for controlling external lighting, HVAC systems, and machinery that operates in harsh environments.
BOX-mounted multi-function relays provide flexibility in installation, allowing for more creative solutions in challenging environments. They also offer the same multi-functionality as DIN-mounted relays, making them versatile across different applications.
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| SMR-B | SMR-H | SMR-K | SMR-T |
| 21.99 € | 13.66 € | 13.66 € | 13.66€ |
| - Super multifunction relay with noiseless operation - Memory retention after power failure - Supports both LED and ESL loads |
- Super multifunction relay with high durability - Contactless operation for silent switching - Supports both incandescent and LED loads |
- Super multifunction relay for 3-wire connection - Suitable for incandescent, ESL, and LED loads - Contactless, silent switching |
- Super multifunction relay for 4-wire connection - High compatibility with various load types - Contactless operation for increased lifespa |
Digital time relays offer precise timing control with digital displays and settings. They are DIN rail-mounted and typically provide more accurate and complex timing functions compared to analog relays.
These relays are used in applications where precise timing is critical, such as in automated production lines, high-precision lighting control, and advanced HVAC systems. The digital interface allows for easy adjustment and monitoring.
Digital time relays bring advanced control to installations that require high precision and reliability. They are particularly beneficial in environments where conditions may change, as they can be quickly reprogrammed to meet new requirements.
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| PRD-2A | PDR-2B | CRM-100 | |
| 64.47 € | 63.08 € | 47.17 € | |
| - Programmable digital relay with 16 functions - Dual output relays - Independent function setting for each relay |
- Advanced programmable relay with 10 functions per relay - Individual settings for both output contacts - Backlit display for easy programming |
- Multifunction relay with LCD display - Precise digital time setting - Wide time range: 0.1s to 999 hours |
Socket or plug-in time relays are designed for easy installation and replacement. These relays typically plug into a base or socket, making them ideal for applications where quick maintenance or relay swapping is necessary.
These relays are commonly used in machinery and systems where downtime needs to be minimized. They are ideal for scenarios where relays are frequently replaced or where maintenance access is limited.
The plug-in nature of these relays offers significant time savings in maintenance and installation. They provide an easy way to upgrade or replace relays without rewiring, making them a practical choice for high-maintenance environments.
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| PTRA-216T | PTRM-216TP | PTRM-216K | PTRM-216T |
| 44.30 € | 41.78 € | 43.75 € | 41.28 € |
| - Multi-function timing relay with high precision - Galvanically separated control inputs - Wide time range: 0.05s to 30 days |
- Multi-function relay with programmable functions - Includes inhibit delay and watchdog features - Extended timing options |
- Multi-function relay with 3 control inputs - Galvanically isolated inputs for added safety - Adjustable time range up to 30 days |
- Versatile timing relay with multiple functions - Star/Delta timing function - Wide input voltage range: 12-240V AC/DC |
Staircase switches are designed specifically to control lighting in stairwells and corridors. They automatically turn off the lights after a set period, which can be adjusted depending on the installation requirements.
These switches are primarily used in residential and commercial buildings to control lighting in common areas like stairwells, hallways, and entrances. They help reduce energy consumption by ensuring that lights are not left on unnecessarily.
Staircase switches offer a straightforward solution for improving energy efficiency and safety in buildings. They are an easy retrofit option for older buildings and can be a significant part of energy-saving initiatives, contributing to lower operational costs.
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| CRM-4 | CRM-47 | ||
| 30.33 € | 35.55 € | ||
| - Basic automatic lighting control - Single SPDT contact (16A) - Adjustable time range: 0.5s to 10 minutes |
- Programmable staircase switch with extended functions - Single SPDT contact (16A) - Adjustable time range: 0.5s to 30 minutes |
Each category of time relays and switches discussed offers unique advantages for different applications. Understanding the specific needs of your project will help in selecting the right device to optimize performance, safety, and energy efficiency. Whether you're working on a new installation or upgrading an existing system, these devices can be key to enhancing operational control and reliability. If you need further assistance in choosing the right relays or switches, feel free to reach out for expert advice tailored to your needs.
