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© 2016 Littelfuse Protection Relays & Controls Time Delay Relays Dedicated - Percentage www.littelfuse.com/pthf4900dk Rev: 1-A-062216 PTHF4900DK L1 N/L2 V = Voltage L = Load S1 = Optional Low Current Initiate Switch T1 = ON Time T2 = OFF Time RT = 100 KΩ RT is used when external adjustment is ordered. Wiring Diagram
Description
The PTHF4900DK can be used for a variety of applications from chemical metering, to temperature regulating, to energy management. The infinite adjustability from 1 to 99% provides accurate percentage on control over a wide factory fixed cycle period. When mounted on a metal surface, it can be used to drive solenoids, contactors, relays, or lamps, up to 20A steady, 200A inrush. The PTHF4900DK is the suggested replacement for the PT Series. Operation (Percentage) Upon application of input voltage, the output energizes and the T1 ON time begins. At the end of the ON time, the output de-energizes and the T2 OFF time begins. At the end of the OFF time, the output energizes and the cycle repeats as long as input voltage is applied. Increasing the ON time decreases the OFF time. The total cycle period is equal to the ON time plus the OFF time. The total cycle period is factory fixed. ON time range is 1 to 99 percent of cycle period. Reset: Removing input voltage resets the output and time delays, and returns the sequence to the T1 ON time. Features & Benefits FEATURES BENEFITS Microcontroller based Repeat accuracy + / -0.5%, Factory calibration + / - 5% ON/OFF recycling percentange control 1 to 99% Accurate control over a wide factory fixed cycle period Compact, low cost design Allows flexiblility for OEM applications and reduces component and labor costs High load currents up to 20A, 200A inrush Allows direct operation of motors, lamps, and heaters without a contactor T otally solid state and encapsulated No moving parts to arc and wear out over time and encapsulated to protect against shock, vibration, and humidity Metalized mounting surface Facilitates heat transfer in high current applications Accessories P1004-95, P1004-95-X Versa-Pot Panel mountable, industrial potentiometer recommended for remote time delay adjustment. P0700-7 Versa-Knob Designed for 0.25 in (6.35 mm) shaft of Versa-Pot. Semi-gloss industrial black finish. P1015-13 (AWG 10/12), P1015-64 (AWG 14/16) Female Quick Connect These 0.25 in. (6.35 mm) female terminals are constructed with an insulator barrel to provide strain relief. P1015-18 Quick Connect to Screw Adapter Screw adapter terminal designed for use with all modules with 0.25 in. (6.35 mm) male quick connect terminals.
© 2016 Littelfuse Protection Relays & Controls Time Delay Relays Dedicated - Percentage www.littelfuse.com/pthf4900dk Rev: 1-A-062216 PTHF4900DK Specifications Time Delay Type External or onboard knob Range/External Adjustment Resistance Adjustable from 1 - 99% / R T = 100 KΩ Cycle Period Fixed from 10s - 1000m Repeat Accuracy ±0.5% or 20ms, whichever is greater Cycle Period Tolerance (Factory Calibration) ≤ ± 5% Reset Time ≤ 150ms Time Delay vs Temp. & Voltage ≤ ±10% Input Voltage 120 or 230VAC Tolerance ±20% AC Line Frequency 50/60 Hz Power Consumption ≤ 2VA Output Type Solid state Maximum Load Currents Steady State Inrush* 1A 10A Voltage Drop ≅ 2.5V at rated current OFF State Leakage Current ≅ 5mA @ 230VAC Protection Circuitry Encapsulated Dielectric Breakdown ≥ 2000V RMS terminals to mounting surface Insulation Resistance ≥ 100 MΩ Mechanical Mounting * Surface mount with one #10 (M5 x 0.8) screw Dimensions H 50.8 mm (2”); W 50.8 mm (2”); D 38.4 mm (1.51”) Termination 0.25 in. (6.35 mm) male quick connect terminals Environmental Operating/Storage Temperature -40° to 60°C / -40° to 85°C Humidity 95% relative, non-condensing 6, 10, 20A units: ≅ 3.9 oz (111 g) *Units rated ≥ 6A must be bolted to a metal surface using the included heat sink compound. The maximum mounting surface temperature is 90°C. Inrush: Non-repetitive for 16ms. Function Diagram PERCENTAGE V = Input Voltage CP = Cycle Period L = Load T1 = ON Time T2 = OFF Time R = Reset L CP CP CP