The HRDR321A4R is a recycling timer with a 24VDC operating voltage, onboard adjustable time delays of 1 to 100 seconds for ON time and 1 to 100 minutes for OFF time, with the on time occurring first. It features a bypass/reset switch, an encapsulated circuit for protection against shock, vibration, and humidity, and SPDT electromechanical relay contacts rated at 30A resistive at 125/240VAC. The unit measures 76.7 mm in height, 51.3 mm in width, and 38.1 mm in depth, and uses surface mounting with a single #10 screw. It has a repeat accuracy of ±0.5% and operates within a temperature range of -40°C to 60°C.
The HRDR Series combines an electromechanical relay and microcontroller timing circuitry. It offers 12 to 230V operation in five ranges and factory fixed, onboard or externally adjustable time delays with a repeat accuracy of ±0.5%. The high switching capacity of the output contacts allow for direct control of heavy loads like compressors, pumps, motors, heaters and lighting. A bypass/reset switch option allows operator to interrupt normal recycling sequence and energize output relay. An excellent choice for OEM applications. Operation (Recycling with Reset Switch)Upon application of input voltage, the ON time T1 begins and output relay energizes. At the end of the ON time, the output relay de-energizes and the OFF time T2 begins. At the end of the OFF time, the output relay energizes and the cycle repeats as long as input voltage is applied. Some recycling timers have the OFF time as the first delay.Reset: Removing input voltage resets output and time delays, and returns sequence to the first delay.
| Littelfuse, Inc. | |
|---|---|
| Product Category | Electromechanical Relays |
| Product Number | HRDR321A4R |
| Product Name | Recycling Timer |
| Mounting | Surface mount with 1 #10 (M5 x 0.8) screw |
