Protection Relays Pump Controls and Liquid Level Controls LLC4 SERIES Octal Plug-In Liquid Level Controls Description The LLC4 combines resistance sensing circuitry with solid-state timing to provide single probe level maintenance. On adjustable units, the sensitivity adjustment allows accurate level sensing while ignoring foaming agents and floating debris. Isolated 12VAC is provided at the probe to prevent electrolysis. A trickle current of less than 1mA determines the presence or absence of conductive liquid between the probe and common. The LLC4 Series can be used with many types of low voltage (resistance changing) transducers to perform other control functions like temperature limit control, photo limit control, condensation sensing, and ice sensing. 8-PIN Operation Drain (Pump-Down Mode): When the liquid level rises and touches the probe, the 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 energize and remain energized until the liquid level falls below the probe level. The output relay de-energize and remain de-energized until the liquid Wiring Diagram rises and touches the probe. P = Probe Fill (Pump-Up Mode): When the liquid level falls below the C = Probe Common probe, the time delay begins. This time delay prevents rapid V = Voltage cycling of the output relay and its load. At the end of the time delay, the output relay energize and remain energized until the Relay contacts are isolated. liquid level rises and touches the probe. The output relay then Connect common to de-energize and remain de-energized until the liquid level again conductive tank. Additional falls below the probe level. probe is necessary for Metal Tank or use non-conductive or additional Probe insulated tanks. Features & Benefits L1 N/L2 FEATURES BENEFITS Isolated 12VAC probes Prevents scale buildup on probe Industry standard 8-pin Eliminates need for special connectors octal plug connection Provides accurate level sensing while ignoring foam Sensitivity adjustment or floating debris Ordering Information INPUT TIME INPUT TIME MODEL OPERATION SENSE RESISTANCE MODEL OPERATION SENSE RESISTANCE VOLTAGE DELAY VOLTAGE DELAY LLC42A10A 24VAC Drain 10s Adjustable 1 - 250k LLC44B1A 120VAC Fill 1s Adjustable 1 - 250k LLC42A1A 24VAC Drain 1s Adjustable 1 - 250k LLC44A60A 120VAC Drain 60s Adjustable 1 - 250k LLC42B15A 24VAC Fill 15s Adjustable 1 - 250k LLC44B20A 120VAC Fill 20s Adjustable 1 - 250k LLC44A10A 120VAC Drain 10s Adjustable 1 - 250k LLC44B2A 120VAC Fill 2s Adjustable 1 - 250k LLC44A15A 120VAC Drain 15s Adjustable 1 - 250k LLC44B30A 120VAC Fill 30s Adjustable 1 - 250k LLC44A1A 120VAC Drain 1s Adjustable 1 - 250k LLC44B4A 120VAC Fill 4s Adjustable 1 - 250k LLC44A2A 120VAC Drain 2s Adjustable 1 - 250k LLC44B5A 120VAC Fill 5s Adjustable 1 - 250k LLC44A4A 120VAC Drain 4s Adjustable 1 - 250k LLC44B5F100 120VAC Fill 5s Fixed 100k LLC44A5A 120VAC Drain 5s Adjustable 1 - 250k If you dont find the part you need, call us for a custom product 800-843-8848 2017 Littelfuse Protection Relays & Controls Rev: 1-A-020817 wwwwww.littelfuse.com/.littelfuse.com/llc4Protection Relays Pump Controls and Liquid Level Controls LLC4 SERIES Accessories Specifications Control BZ1 Front Panel Mount Kit Type ON/OFF (single level) resistance sensor with Provides an easy method of through-the-panel built-in time delay to prevent rapid cycling mounting of 8- or 11-pin plug-in timers, flashers, Sensing Voltage 12VAC and other controls. Sensing Resistance Fixed or adjustable to 250K Sensing Resistance NDS-8 Octal 8-pin Socket Tolerance Adjustable: 1K 500 at low end 8-pin 35mm DIN rail or surface mount. Surface 250K 25% at high end mounted with two 6 (M 3.5 x 0.6) screws or Factory fixed: 10% or 500, whichever snaps onto a 35 mm DIN rail. Uses PSC8 hold- is greater down clips. Input Voltage 24, 120, or 230VAC PSC8 Hold-down Clips Tolerance Securely mounts plug-in controls in any position. Provides protection against vibration. Use with 24VAC -15%, +20% NDS-8 Octal Socket. Sold in pairs. 120 & 230VAC -20%, +10% AC Line Frequency 50/60 Hz Output PHST-38QTN Electrode Type Electromechanical relay Designed for a maximum steam pressure of Form Isolated, SPDT 240 PSI 400 F. UL353 Recognized. Rating 4A resistive 240VAC LLP-24 Threaded Probe (24) 1/10 hp 240VAC Threaded stainless steel probe measuring 24 Protection (61 cm) long. For use with PHST-38QTN liquid Surge IEEE C62.41-1991 Level A level control electrodes. Isolation Voltage 1500V RMS between input, output & probe Mechanical Mounting Plug-in socket Termination Octal 8-pin plug-in Dimensions H 73.9 mm (2.91) W 60.7 mm (2.39) D 45.2 mm (1.78) Environmental Operating/Storage Temperature -20 to 60C/-40 to 80C Weight 6 oz (170 g) 2017 Littelfuse Protection Relays & Controls Rev: 1-A-020817 wwwwww.littelfuse.com/.littelfuse.com/llc4