Protection Relays Pump Controls and Liquid Level Controls LLC5 SERIES Liquid Level Controls Description The LLC5 provides dual probe conductive liquid level control in a convenient octal plug-in package. Models are available for fixed fill or drain operation. Isolated, pulsed DC voltage on the probes prevents electrolytic plating. Less than 1 mA of current is used to sense the presence of conductive liquid between the probes and common. On adjustable units, the sensitivity adjustment eliminates false tripping caused by oating debris and ffl oaming agents. Operation Drain (Pump-Down Mode): When the liquid level rises and touches the high level probe, the output relay and LED 8-PIN energize and remain energized until the liquid level falls below the low level probe. The output relay and LED de-energize and remain de-energized until the liquid rises and touches the high Wiring Diagram level probe. Fill (Pump-Up Mode): When the liquid level falls below HP = HIGH LEVEL PROBE the low level probe, the output relay and LED energize and LP = LOW LEVEL PROBE remain energized until the liquid level rises and touches the C = PROBE COMMON high level probe. The output relay and LED de-energize and V = VOLTAGE remain de-energized until the liquid level again falls below the Relay contacts are isolated. low level probe. Connect common to conductive tank. Additional probe is necessary for non- Metal Tank or use Features & Benefits additional Probe conductive or insulated tanks. L1 N/L2 FEATURES BENEFITS Unique Probe Probes are protected from scale build up through Protection logic pulsed DC signal between the probes. Visual indication of relay engagement in pump-up or LED status indicatior pump-down activity Isolated 5A Ordering Information Allows control of loads for AC voltage SPDT contacts LINE MODEL DESCRIPTION VOLTAGE Accessories For Drain (pump-down) operation with LLC52AA 24VAC adjustable sense resistance BZ1 Front Panel Mount Kit Provides an easy method of through-the-panel For Fill (pump-up) operation with adjustable LLC52BA 24VAC mounting of 8- or 11-pin plug-in timers, flashers, sense resistance and other controls. For Drain (pump-down) operation with LLC54AA 120VAC adjustable sense resistance NDS-8 Octal 8-pin Socket 8-pin 35mm DIN rail or surface mount. Rated For Drain (pump-down) operation with at 10A 300VAC. Surface mounted with two LLC54AAS 120VAC adjustable sense resistance and reverse 6 (M 3.5 x 0.6) screws or snaps onto a 35 mm connection ( 8 low, 6 high) DIN rail. Uses PSC8 hold-down clips. For Drain (pump-down) operation with fixed LLC54AF10 120VAC sense resistance of 10 k PSC8 Hold-down Clips Securely mounts plug-in controls in any position. For Fill (pump-up) operation with adjustable LLC54BA 120VAC Provides protection against vibration. Use with sense resistance NDS-8 Octal Socket. Sold in pairs. For Fill (pump-up) operation with adjustable Note: use of the PSC8 clips partley covers the LED window of LLC54BAS 120VAC sense resistance and reverse connection the LLC5 unit. Use of alternative socket base P1011-6 with its ( 8 low, 6 high) corresponding hold down clips PSCRB8 do not cover up the LED window, but the socket base is not DIN rail mountable. For Drain (pump-down) operation with LLC56AA 230 VAC adjustable sense resistance 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-062116 www.littelfuse.com/LLC5Protection Relays Pump Controls and Liquid Level Controls LLC5 SERIES Accessories Specifications Control PHST-38QTN Electrode Type Resistance sensing for high & low level Designed for a maximum steam pressure of 240 detection of conductive liquids PSI 400 F. UL353 Recognized. Sensing Voltage Pulsed DC at probe terminals LLP-24 Threaded Probe (24) Sensing Resistance Factory fixed or adjustable to 100K Threaded stainless steel probe measuring 24 Sensing Resistance (61 cm) long. For use with PHST-38QTN liquid Tolerance Adjustable: 1K 500 at low end level control electrodes. 100K 25%, 0% at high end Factory fixed: 10% or 500 whichever is greater Response Time Debounce time delay <1s Input Tolerance 24VAC -15%, +20% 120 & 230VAC -20%, +10% AC Line Frequency 50/60 Hz Output Type Electromechanical relay Form Isolated, SPDT Rating 5A resistive 240VAC, 1/10 hp 240VAC Protection Isolation Voltage 1500V RMS between input, output, & probe Mechanical Mounting Plug-in socket Dimensions H 60.7 mm (2.39) W 45.2 mm (1.78) D 76.5 mm (3.01) Termination Octal 8-pin plug-in Environmental Operating/Storage Temperature -20 to 60C / -40 to 80C Weight 6 oz (170 g) approx. 2016 Littelfuse Protection Relays & Controls Rev: 1-A-062116 www.littelfuse.com/LLC5