Littelfuse PC-100-LLC-CZ Liquid Level Control Relay 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.

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).

Must Use Model OT08PC or P1011-6 Socket for UL Rating!

Littelfuse PC-100-LLC-CZ Liquid Level Control Relay Typical Applications

• Pump-Up
• Pump-Down

Littelfuse PC-100-LLC-CZ Liquid Level Control Relay Product Features

• One Unit Serves Pump-Up and Pump-Down Applications
• Adjustable Sensitivity Knob (4.7 to 100Kohms)
• Debounce Time Delay (2 seconds)
• Single or Dual Probe Inputs (+ common reference)
• Compatible with Crouzet’s PNR & PNRU Series Liquid Level Control
• LED Indicator
• UL508 Listed
• CE Marked
• 8-Pin Plug In; DIN Rail or Surface Mount
• 5-Year Warranty
• Made in the USA

Littelfuse PC-100-LLC-CZ Liquid Level Control Relay Product Specifications

Line Voltage . . . . . . . . . . . . 95-120 VAC

Frequency . . . . . . . . . . . . 50/60Hz

Probe Sense Voltage . . . . . . . . . 5VDC pulsed

Debounce Time Delay . . . . . . . . . . . . . . 2 seconds

Probe Sensitivity . . . . . . . . . . . . . . 4.7k to 100k Adjustable

Output Contact Rating

• . . . . . . . . . . . . . . . . . . . . . 480VA @ 240VAC Pilot Duty
• . . . . . . . . . . . . . . . . . . . . . 10A @240VAC General Purpose

Temperature Range . . . . . . . . . . . . . . . . . . . . . -40° to 70°C (-40° to 158°F)

Maximum Input Power . . . . . . . . . . . . . . . . . . . . . 5 W

Electrostatic Discharge (ESD) . . . . . . . . . . . . .IEC 61000-4-2, Level 3, 6kV contact, 8kV air

Radio Frequency Immunity (RFI) . . . . . . . . . . IEC 61000-4-3, Level 3, 10V/m

Fast Transients . . . . . . . . . . IEC 61000-4-4, Level 3, 4kV input power

Safety Mark

• UL (OT08PC octal socket required) . . . . . . . . . .UL508 (File #E68520)
• CE . . . . . . . . . . . . . . . . . . . . . . . IEC60947-6-2

Weight . . . . . . . . . . . . . . . . . . . . . . . . 10.4 oz.

Mounting Method . . . . . . . . . . . DIN rail or surface mount (plug into OT08PC socket)

Socket Available . . . . . . . . . . . Model OT08PC (UL Rating 600V)

The 600V socket can be surface mounted or installed on DIN Rail.

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Littelfuse PC-100-LLC-CZ Liquid Level Control Relay Product Resources

Littelfuse PC-100-LLC-CZ Product Specifications

Littelfuse PC-100-LLC-CZ Installation Bulletin

Littelfuse PC-100-LLC-CZ Engineering Bulletin