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The HRDS Series combines an electromechanical relay output with microcontroller timing circuitry. It offers 12 to 230V operation in five options and factory fixed, onboard or external adjustable time delays with a repeat accuracy of ±0.5%. The output contact rating allows for direct operation of heavy loads, such as compressors, pumps, blower motors, heaters, etc. This series is ideal for OEM applications where cost is a factor.
Operation (Single Shot)
必须在计时之前和计时期间施加输入电压。 Upon momentary or maintained closure of the initiate switch, the output relay energizes for a measured interval of time. At the end of the delay, the output de-energizes. Opening or reclosing the initiate switch during timing has no affect on the time delay. 当施加输入电压时，如果启动开关闭合，输出将通电。
重置: Reset occurs when the time delay is complete and the initiate switch is opened. 丢失输入电压会复位时间延迟和输出。