Protection Relays Pump Controls and Liquid Level Controls PC-XXX-LLC-CZ / PC-XXX-LLC-GM SERIES Liquid level control Description The PC-xxx-LLC-CZ and PC-xxx-LLC-GM series are liquid level control relays used to control conductive liquid pumping operations in a pump-up or pump-down application. The units come in two different voltage ranges (see specs below). The units have an adjustable sensitivity knob (4.7 k to 100 k ohms) that is set according to the resistance level at which you want the probes (sold separately) to sense the conductive liquid. The units have a built-in debounce time delay that prevents the relay from energizing if the probe resistance momentarily goes above or below the sensitivity setpoint (due to liquid splashing in the tank). The units operate their internal relay based on inputs from a high and low probe and a common reference (when a conductive tank is used) or common probe (when a non-conductive tank is used). Wiring Diagram PC-xxx-LLC-CZ TYPICAL WIRING DIAGRAM FOR PC-XXX-LLC-CZ g Compatible with Crouzets PNR & PNRU series liquid level control PC-xxx-LLC-GM g Compatible with Gems Series 16M general purpose control Must use Model OT08PC or P1011-6 socket for UL Rating Note: Manufacturers recommended screw terminal torque for the OT Series Octal Sockets is 12 in.-lbs. Features & Benefits FEATURES BENEFITS Debounce time delay Prevents rapid cycling of the pump due to (2 seconds) turbulance in the tank Adjustable sensitivity Allows user to fine tune the sensing resistance to prevent false tripping due to foam or debris (4.7 to 100 K ohms) Dual probe design Allows user the ability to set the level (plus a common) differential required Ordering Information MODEL LINE VOTAGE DESCRIPTION TYPICAL WIRING DIAGRAM FOR PC-XXX-LLC-GM Compatible with Crouzet s PNR & PNRU PC-100-LLC-CZ 95-120 V ac series liquid level control Compatible with Crouzet s PNR & PNRU PC-200-LLC-CZ 190-240 V ac series liquid level control Compatible with Gems series 16M PC-100-LLC-GM 95-120 V ac liquid level control Compatible with Gems series 16M PC-200-LLC-GM 190-240 V ac liquid level control 2019 Littelfuse, Inc. Rev: 2-B-043019 wwwwww.littelfuse.com/.littelfuse.com/pcxxxllccz-pcxxxllcgmProtection Relays Pump Controls and Liquid Level Controls PC-XXX-LLC-CZ / PC-XXX-LLC-GM SERIES General Characteristics Accessories Temperature Range -40 C to 70 C (-40 F to 158 F) OT08PC 8-pin Octal Socket Maximum Input Power 5 W Octal Socket for plug-in units. 8-pin surface & Sandards Passed DIN-rail mountable. Rated for 10 A 600 V ac. Electrostatic Discharge (ESD) IEC 61000-4-2, Level 3, 6 kV contact, 8 kV air. Radio Frequency Immunity (RFI) 150 MHz, 10 V/m Fast Transients IEC 61000-4-4, Level 3, 2 kV input power and controls Specifications Safety Marks Input Characteristics UL (OT08PC octal Supply Voltage socket required) UL 508 (File E68520) PC-100-LLC-CZ 95-120 V ac CE IEC60947-6-2 PC-100-LLC-GM 95-120 V ac Dimensions H 44.45 mm (1.75) W 60.33 mm (2.375) PC-200-LLC-CZ 190-240 V ac D 104.78 mm (4.125) PC-200-LLC-GM 190-240 V ac Weight 0.65 lb. (10.4 oz., 294.84 g) Frequency 50/60 Hz Mounting Method DIN rail or surface mount Functional Characteristics (plug into OT08PC socket) Probe Sense Voltage 5 V dc pulsed Socket Available Model OT08PC (UL Rating 600 V) Debounce Time Delay 2 seconds Probe Sensitivity 4.7 k to 100 k adjustable The 600 V socket can be surface mounted or installed on DIN Rail. Output Characteristics Output Contact Rating Pilot Duty 480 VA 240 V ac General Purpose 10 A 240 V ac 2019 Littelfuse, Inc. Rev: 2-B-043019 wwwwww.littelfuse.com/pcxxxllccz-pcxxxllcgm.littelfuse.com/