The HRDR331A1 is a recycling timer in the HRDR Series, featuring external adjustment of both on and off delays from 1 to 100 seconds with repeat accuracy of ±0.5%. It operates on 24VDC, has an SPDT non-isolated electromechanical relay output rated for 30A at 125/240VAC resistive loads, and a 20A DC rating at 28VDC. The unit is encapsulated for protection against shock, vibration, and humidity, and terminates in 0.25 in. (6.35 mm) male quick connect terminals. It mounts with a single #10 screw and measures 76.7 mm high by 51.3 mm wide by 38.1 mm deep. Operating temperature ranges from -40°C to 60°C, with storage up to 85°C. No bypass/reset switch is included.
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 | HRDR331A1 |
| Product Name | Recycling Timer |
| Mounting | Surface mount with 1 #10 (M5 x 0.8) screw |
