Protection Relays Pump Controls and Liquid Level Controls LLC1 SERIES Open Board Liquid Level Controls Description The LLC1 Series is a single probe conductive liquid level control designed for OEM equipment and commercial appliances. This unit may be ordered with fixed fill or fixed drain operation. A time delay (1-60s) prevents rapid cycling of the output relay. On adjustable units, the sensitivity adjustment allows accurate level sensing while ignoring foaming agents and floating debris. Isolated AC voltage is provided at the probe to prevent electrolysis. A trickle current of less than 1mA determines the presence or absence of liquid between the probe and common. The LLC1 Series printed circuit board is conformal coated to resist moisture and corrosion. Operation Drain (Pump-Down Mode): When the liquid level rises and touches the probe, a fixed time delay begins. This time delay prevents rapid cycling of the output relay and its load. At the end of the time delay, the output relay energizes and remains energized until the liquid level falls below the probe. The output relay then de-energizes and remains de-energized until the liquid Wiring Diagram again touches the probe. P = Probe Fill (Pump-Up Mode): When the liquid level falls below the L = Load probe, a fixed time delay begins. This time delay prevents rapid V = Voltage C cycling of the output relay and its load. At the end of the time S = Sensitivity delay, the output relay energizes and remains energized until Adjustment the liquid level rises and touches the probe. The output relay then de-energizes and remains de-energized until the liquid level Contacts A, B & C Metal Tank or use again falls below the probe. are isolated. additional Probe Connect common to Features & Benefits conductive tank or an additional probe FEATURES BENEFITS as required. L1 N/L2 Isolated AC voltage Prevents scale buildup on the probe on probe Cost effective design for OEM equipment and Open PCB design commercial appliances Conformally coated PCB Protects against moisture and corrosion Provides accurate level sensing while ignoring foam Sensitivity adjustment or floating debris Ordering Information INPUT TIME SENSE MODEL OPERATION MOUNTING VOLTAGE DELAY RESISTANCE LLC14A1AX 120VAC Drain 1s Adjustable 0.5 in nylon standoffs (3) LLC14A5AX 120VAC Drain 5s Adjustable 0.5 in nylon standoffs (3) LLC14B15AX 120VAC Fill 15s Adjustable 0.5 in nylon standoffs (3) 120VAC LLC14B1AX Fill 1s Adjustable 0.5 in nylon standoffs (3) LLC14B60AX 120VAC Fill 60s Adjustable 0.5 in nylon standoffs (3) LLC16A25AX 230VAC Drain 25s Adjustable 0.5 in nylon standoffs (3) LLC16A3AX 230VAC Drain 3s Adjustable 0.5 in nylon standoffs (3) If you dont find the part you need, call us for a custom product 800-843-8848 2016 Littelfuse Protection Relays & Controls Rev: 1-A-062716 wwwwww.littelfuse.com/.littelfuse.com/llc1Protection Relays Pump Controls and Liquid Level Controls LLC1 SERIES Accessories Specifications Control P1015-13 (AWG 10/12), P1015-64 (AWG 14/16), Type ON/OFF (single level) resistance sensor with P1015-14 (AWG 18/22) Female Quick Connect built-in time delay to prevent rapid cycling These 0.25 in. (6.35 mm) female terminals are Sense Voltage Low voltage AC between probe & common. constructed with an insulator barrel to provide Isolated from input & output. strain relief. Sense Resistance Fixed or adjustable to 250K Sense Resistance Tolerance Adjustable - guaranteed range P1015-18 Quick Connect to Screw Adapter Factory fixed 10% Screw adapter terminal designed for use with Time Delay all modules with 0.25 in. (6.35 mm) male quick Range Fixed 1 - 60s in 1s increments connect terminals. Input PHST-38QTN Electrode Voltage 24, 120, or 230VAC Designed for a maximum steam pressure of Tolerance 240 PSI 400 F. UL353 Recognized. 24VAC -15% - 20% LLP-24 Threaded Probe (24) 120 & 230VAC -20% - 10% Threaded stainless steel probe measuring 24 AC Line Frequency 50/60 Hz (61 cm) long. For use with PHST-38QTN liquid Output level control electrodes. Type Electromechanical relay Form Non-isolated, SPST & Isolated, SPDT contacts Rating 10A resistive 120/240VAC & 28VDC 1/3 hp 120/240VAC 7 5 Life Mechanical - 1 x 10 Electrical - 1 x 10 Protection Surge IEEE C62.41-1991 Level A Isolation Voltage 1500V RMS between input, output & probe Mechanical Mounting Surface mount to probe common with two 6 (M3.5 x 0.6) screws or 0.50 in. (12.7 mm) nylon standoffs with three 6 (M3.5 x 0.6) screws (use Terminal 5 for probe common) Termination 0.25 in. (6.35 mm) male quick connect terminals Dimensions (Open Board) H 88.9 mm (3.5) W 69.9 mm (2.75) D 50.8 mm (2.0) Environmental Operating/Storage Temperature -20 to 55C/-40 to 80C Coating Printed circuit board is conformal coated to resist moisture and corrosion Weight 8.7 oz (247 g) 2016 Littelfuse Protection Relays & Controls Rev: 1-A-062716 wwwwww.littelfuse.com/.littelfuse.com/llc1