Relays and Timers
Relays open and close electrical circuits, using either electromechanical or electronic methods to switch the circuit. Relays are used to control one or more circuits remotely by using a single input signal.
Relays and Timers are essential pieces of the automation process. Our stock of Relays and Timers includes a variety of electro-mechanical and solid-state devices with different ranges and capabilities. This variety allows our Relays and Timers to fill the needs of many applications.
- Available from 6 to 16 Amps
- SPDT, DPDT, 3PDT, and 4PDT Options
- Terminal Block or Ice Cube
Solid State Relays
- Available from 2 to 50 Amps
- SPDT and SPST-NO Options
- Terminal Block, Hockey Puck, or Three Phase
- Some models feature Integrated Heatsink
- Available from 5 to 50 Amps
- SPDT (with SPST-NO option for Pump Seal relays)
- Line Voltage, Current Monitoring, 3-Phase Monitoring and Pump Seal Failure Relays Available
Timing, Alternating, & Sequencing
- Available from 2 to 16 Amps
- SPDT, DPDT, 3PDT, and SPST-NO Options
- Timers, Time Delay Relays, Timer Interface Modules, Latching Relays, Clocks/Calendars and Timer/Counter/Tachometers Available
Sockets & Accessories
Many accessories are also available including:
- Relay Sockets
- Fuse Modules
- Heatsinks and Thermal Pads
What are Relays and Timers?
A relay is an electrically controlled device that allows an electrical circuit to be switched on or off. The use of relays allows for one or more circuits to be controlled by a different control circuit. Timers are relays that operate on a time delay.
Where are Relays and Timers used?
Relays are an essential part of the motor control and industrial worlds. As such, they are used in many types of applications including:
- Industrial Controls
- HVAC Systems
Who uses Relays and Timers?
Anyone with a need to control an electrical circuit in an industrial setting is likely to use a relay. Some examples of industries that see widespread use of relays are:
- Industrial Control
- Heating and Air
- Water, Wastewater, and Power
- Building Control
When choosing your relays, the most important factors to consider are the amps, number of poles and throws, and coil voltage.
What are the Required Amps?
A relay’s amp rating refers to the maximum rated current. This is the highest current that a relay should be switching.
Number of Circuits and Switching Positions?
In relays, there can be multiple individual circuits (or poles) that act as the common terminal(s) that power travels through. Each circuit can have one or multiple extreme switching positions (or throws). The switching positions refer to the points where the circuit(s) can connect depending on whether the relay is energized or de-energized.
Example 1: In a single pole single throw (SPST) relay, there is one place where the power comes in and then only one place for it to go when the circuit is closed.
Example 2: In a single pole double throw (SPDT) relay, the power comes in on a single path and can connect to one of two points depending on if the relay is energized or not.
Normally Open or Normally Closed?
Relays with only one switching position (e.g. SPST) are either Normally Open (NO) or Normally Closed (NC). NO relays keep a circuit open until energized and NC relays do the opposite. NO relays are used so that energizing a relay sends power to the devices operating on that electrical circuit. NC relays are used so that energizing a relay cuts off power from the devices operating on that electrical circuit.
What Coil/Control Voltage?
The coil voltage of a relay refers to the coil operating voltage. This rating is the voltage required to cause the relay to switch and either close a circuit (NO) or open a circuit (NC).
When selecting a timer, the best method is to refer to the timing and capabilities charts for the timer and choose the chart that best reflects the needs of your application.
1. ON Delay
2. Signal ON Delay
3. ON Delay with Signal Reset
4. Signal ON/OFF Delay
5. 2-stage ON Delay
6. ON Delay Pulse
7. Interval ON
8. Interval ON/OFF Delay with Retrigger
9. Signal OFF Delay with Retrigger
10. Falling Edge with Retrigger
11. Falling Edge One Shot
12. True OFF Delay
13. Rising Edge One Shot
14. Rising Edge with Retrigger
15. Repeat Cycle ON
16. Repeat Cycle ON with Signal Hold
17. Asymmetric Signal Cycle ON
18. Repeat Cycle OFF
19. Asymmetric Repeat Cycle OFF
20. Asymmetric Repeat Cycle (OFF First)
21. Signal Asymmetric Signal Cycle OFF
22. Asymmetric Signal Cycle OFF
23. Memory Latch
24. Impulse Relay with Delay
25. Star-Delta Start Relay
26. Clock/Calendar Timer
Delta Electronics is a global leader in power and thermal management solutions. They are committed to high quality and value in every product, and this includes their CTA Series counter/timer/tachometers. Delta’s products fit a wide variety of applications.
Delta Products Include:
- Temperature & Process Controllers
More about Delta
EL.CO. S.R.L has been manufacturing relays since 1986. They produce a variety of high-quality and reliable automation products including electromechanical and solid-state relays. These relays have been designed based on decades of experiences. EL.CO.’s focus in relay design is on low power requirements, quick response times, and long product life.
EL.CO. Products Include:
- Electromechanical Relays
- Solid State Relays
More about EL.CO.
ELKO is one of the world’s leading manufacturers of electronic equipment including modular DIN switches. They perform research and development in their own R&D center with more than 30 engineers at work developing new products and improving existing products. As with all of ELKO products, the modular DIN switches are produced in conformity with ISO 9001 production standards.
ELKO Products Include:
- Modular DIN Switches
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For over 50 years, Finder S.p.A. has been developing and manufacturing reliable, high-quality products. Their expansive selection of industrial electrical relays focuses on reliability and convenience. Finder constantly seeks to improve their products and services through research, product and process development, high-tech automation, digital transformation, and expansion of infrastructure.
Finder Products Include:
- Electromechanical Relays
- Solid State Relays
- Timing, Alternating, and Sequencing Relays
More about Finder
When you see the FMX brand on a product it means you can be assured of high quality and competitive pricing. Most FMX products are produced in the same factories and on the same production lines as many well-known major name brands offered in the market today. All of these products meet or exceed the expected quality and certification requirements for many industrial applications and undergo stringent testing to ensure they will perform according to standards in the field.
FMX Products Include:
- AC Drives
- Miniature Circuit Breakers
- Motor Controls
- Panel Meters
- Signal Lights
- Terminal Blocks
- Wiring Solutions
More about FMX