339B Plug-In Adjustable Time Delay Relay

Off before timing, the LED blinks at an ever-increasing rate as the cycle progresses; once every 3 1/2 seconds during the first 10% of the cycle, twice during the second 10%, and so on. Each has six dial selected ranges from fractions of a second to as long as 10 hours. The dial face automatically displays the selected range.Cycle Progress Indication: The 339's LED annunciator provides a unique and effective method of cycle progress indication. At time-out, the LED stays on constantly, pulsing at a high rate. even after long periods of down-time. Two models are available. In the 1 and 10-second ranges, the LED is off before timing, steady on during timing, and pulsing on after time-out.High Accuracy: The 339's timing circuit is not a simple RC circuit, but utilizes the sophistication of a proprietary integrated circuit that includes counting technology along with a stable oscillator to provide repeatable time delays.Multiple Timing Modes: Every 339 can be used for either on-delay or interval timing operation. An unusually versatile timer, the 339 has six dial-selected ranges-from 0.3 sec to 3 hours or 1 sec to 10 hours-and provides dial-adjustable timing periods between 0.075 seconds and 10 hours. Each model has a selectable on-delay or interval timing mode.Wide Choice of Ranges: In addition to the short ranges expected of an electronic TDR, the 339 is also available with ranges as long as 10 hours. A single 339 model thus accommodates the needs of a wide range of applications, allowing the user to select easily and precisely-an appropriate range to permit optimum setting accuracy. The timing mode is selectable by a switch on the 339A housing. An economical solid-state TDR with octal plug-in base, the 339 maintains excellent repeat accuracy despite wide voltage and temperature variations.

Industrial Control & Automation,Electrical Relays,Time Delay Relays

339B Plug-In Adjustable Time Delay Relay