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Relays / Timers
Relays and Timers
Relays have been the traditional building blocks of control since the 1950s. Still in wide use for simple control or power conversion, styles include electro-mechanical general or special purpose relays such as high power or hazardous location styles, as well as solid-state relays.
Relay Switches & Timer Relays
Category Selection
Electro-Mechanical Relays
Electromechanical relay switches are available in square relay / ice cube relay, plug-in relay, octal relay, power relay, hazardous location (HAZLOC) relay, latching relay, slim / card relay, panel mount, socket mount and DIN rail relay styles for use in a wide range of process control applications.
- Slim Interface Relays
- Force Guided Relays
- Square Relays / Cube Relays, Plug-In, 3A - 15A
- Octal Relays, Plug-In, 10A - 16A
- Power Relays, Open-Style, 40A
- Hazardous Location (HAZLOC), Plug-In Relays, 3A - 12A
- Latching Relays, Octal, 16A
- Slim / Card Relays, 5A
Solid State Relays (SSR)
A solid state relay switch is a control relay with isolated input and output, whose functions are achieved by means of electronic components without the use of moving parts such as those found in electromechanical relays.
These electronic relays are ideal for applications with many contact closures since solid state relay switches offer a greatly extended life compared to electromechanical relays.
- Panel Mount Relays, Hockey Puck Style,10A - 75A
- DIN Rail Mount Relays, 8A - 65A
- Socket Mount Relays, 4A
- Hazardous Location (HAZLOC) Relays, 8A, 10A, 15A
Optocoupler Relays
Murrelektronik optocouplers and semiconductors are used to combine different signal levels or to isolate one signal from another. They are similar to a relay interface because they provide an optoelectronic signal transfer between input and output. Optocouplers and semiconductors have a long life span because they don't have any mechanical components that could wear out. They are suitable for applications with high switching frequencies, even over a long time.
- High resistance to shock and vibration
- High switching currents
- Low input power
Optocoupler Relays Overview
Phase Monitoring Relays
Phase monitor relays provide protection against premature equipment failure caused by voltage faults on 3-phase systems. ProSense® phase monitor relays are compatible with typical Wye or Delta systems.
- PMRU-TL Series relays provide protection against phase loss, phase reversal, phase unbalance, undervoltage and overvoltage
- PMRR-TL Series relays provide phase reversal protection
- PMRRL-TL Series relays provide phase loss, phase reversal and undervoltage protection
Alternating Relays
Alternating relays are used in special applications where the optimization of load usage is required by equalizing the run time of two loads.
- For duplex loads
- 120VAC Control voltage
- AR-TL Series Relays:
10A SPDT output configuration
can be used with one or two control switches - ARX-TL Series Relays:
10A DPDT cross-wired output configuration
can be used with two or three control switches
Pump Seal Failure Relays
PSFR relays are designed to monitor the shaft seals of submersible pumps. The relay output can be used to give an alarm indication of a leaking seal. The relay will automatically reset when the fault condition clears.
- Monitors submersible pump seals for leakage
- 8-pin, SPDT, single channel for one pump
- Adjustable sensitivity ranges (4.7K to 100K ohm)
- Uses industry-standard 8-pin octal sockets
Intrinsically Safe Relays
The ISD Series of Intrinsically Safe Relays provide a safe and reliable method to control up to four loads (motor starters, relays, etc.) with up to four input devices (switches, sensors, etc.) located in a hazardous area.
The ISE Series of Intrinsically Safe Relays provide a safe and reliable method to control a single load (motor starters, relays, etc.) with a single input device switches, sensors, etc.) located in a hazardous area.
Relay Sockets & Accessories
A variety of relay sockets and accessories for various brands/types of relay switches are available.
Timer Relays / Counters / Tachometers
Timer relays provide simple time-based control, with multiple modes and adjustable timing ranges, discrete outputs, and a mechanical or electronic display. A variety of timers are available from well-known industry brands, such as Fuji, Dold, Murrelektronik, Koyo and AutomationDirect's own ProSense line.. Also available are multi-function digital counters/timer/tachometers with digital displays that are easy to configure and connect.
ProSense relay timers ... New!
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