800.727.5646 automatictiming.com Automatic Timing & Controls 304GX Series Percentage Timers // 304GX Series 7 So l i d - S t a t e Pe r c e n t a g e T i m er The operation of the new 304GX Percentage Timer is similar to the 304G with several noteworthy enhancements. The accuracy of the 304GX has been improved to 1% of range. With the Cycle Progress Memory feature, when power is removed and restored during the cycle, the 304GX will continue the cycle without resetting. The latching relay only changes state when the cycle reaches the setpoint or the end of the cycle. CONTACTS: The relay contact is capable of switching 10 A to a resistive 120 VAC or 30 VDC load. It is capable of driving a 1/3 HP load at 120 VAC. CYCLE PROGRESS INDICATION: The 304GX has a pilot light that is on solid during the relay off time. It blinks at a faster rate during the relay on time: once every 3.2 seconds during the first 10% of the cycle, twice during the second 25% and so on. HIGH ACCURACY: The 304GX's timing circuit is not a simple RC circuit. It utilizes the microprocessor that includes counting technology along with a stable crystal oscillator to provide repeatable time delays. CONVENIENT ADJUSTMENT: Graduated in easily read 1% increments, the 304GX provides continuous adjustment of on time between 5 and 95%. \\\SPECIFICATIONS MODEL 304GX Non Plug-In CONTACT RATINGS (non-inductive) 10A at 120 VAC TEMPERATURE RATING 32° to 120°F (0° to 50°C) SETTING ACCURACY ±1% of range 5 to 95% on time, in 1% graduations. FULL ON, FULL OFF FEATURE. When pointer is set below 3%, load switch contacts are open continuously; above 98%, contacts are closed continuously in all seconds ranges. RANGES Standard 60 SEC range three configurable ranges of 15 SEC, 30 SEC, 120 SEC, 15 MIN, 30 MIN, 60 MIN and 120 MIN LOAD RELAY One SPST Relay POWER REQUIREMENTS 120V, 50/60 Hz; 50mA running current 240V, 24V and 24 VDC also available TERMINALS 4 screw terminals accessible at rear; wiring diagram on housing WEIGHT Net: 5.6 oz. Shipping: 1 lb. MODEL NUMBER >>>>>> 304GX Range 400 Q 00 XX Multi-range, Jumper Selectable* 15/30/60/120 SEC *Factory Set to 60 Sec Range 15 SEC 004 30 SEC 006 60 SEC 007 Voltage & Frequency 120 VAC, 50/60 Hz 240 VAC, 50/60 Hz R 24 VAC, 50/60 Hz T 24 VDC N Dial Calibration Standard Reverse Dial 01 Features Standard Special XK \\\OPERATION The 304GX comes standard in the 60 SEC range but is user configurable for the 15 SEC, 30 SEC, 120 SEC by jumpers from the PC board. Each of these ranges can also be made minutes range by a jumper. Its solid-state circuitry repeatedly closes the SPST load switch for a percentage of the time cycle, as set on the timer dial, and opens it for the remainder of the cycle. When the dial pointer is set below 3%, the load switch stays open for the full cycle; it remains closed when the pointer is set above 98%. This is true for all seconds and minutes. If power is interrupted, the 304GX timer will not reset and the relay state will not change. When power is restored, the timer will continue the interrupted cycles.

304GX Series Automatic Timing & Controls automatictiming.com 800.727.5646 8Percentage Timers // 304GX Series \\\DIMENSIONS (INCHES) \\\WIRING CHART 1 *Range of Configuration Range J1 J2 15 SEC IN IN 30 SEC IN OUT 60 SEC OUT OUT 120 SEC OUT IN *For same minute ranges, jump J0 Examples: 1. Jump J2, No Jump J1, make a 120 SEC range 2. Jump J0, No Jump J1, J2, make a 60 minute range. \\\USER CONFIGURATION