Data Sheet Liquitron™ DC5500 Series Conductivity Controller Cooling Tower Controller Tower Bleed & Feed with Dual Biocide Additions The Liquitron DC5500 Series Conductivity Controller is a microprocessor based control system that will operate in a variety of water treatment applications. The DC5500 provides a set point and relay for conductivity control, and a variety of timer functions to control chemical addition, including dual biocides. Store up to 31 days of data and download via RS-232 or via modem connection with optional LMI LiquiCommTM Communications Package. This data can be viewed in a graph or report format. Wireless paging/emails of alarm conditions are also available. Programming this controller is simple and is accomplished using only three keys. The backlit LCD display and LEDs provide a visual indication of operating conditions and equipment status. Features • 0-20,000 µS Control Range • Two Water Meter Inputs • Display units in µS or in PPM/TDS • Flow Switch Compatible (N.O. or N.C.) • Temperature Display in °C or °F • 4-20 mA Non-Isolated Output Signal • High and Low Alarm with Output Relay • Three Tank Level Inputs with Alarms • Four Inhibitor Feed Modes (on/off or pulse) • RS-232 Connection Port • Dual Biocide Pump Output (on/off or pulse) • Programmable RS485 Address • Time or Conductivity Based Prebleed • 32 Character 2-Line Backlit LCD • Data Logging/Remote Communications (optional) • UL, CUL, CE Certified • Wireless Paging (optional) 8 Post Office Square Acton, MA 01720 USA TEL: (978) 263-9800 FAX: (978) 264-9172 http://www.Imipumps.com 1954. A 5/01

Liquitron DC5500 Series Specifications Enclosure NEMA 12X Type (prewired version) Type Hardwiring makes the unit suitable for NEMA 4X applications Material Housing - Flame retardant, molded TPE Cover - Clear molded polycarbonate, lockable Environment 32° F to 122° F (0° C to 50° C) 0% to 95% (non-condensing) relative humidity Hardware 115 VAC ON/OFF units provided with a 6 ft (2 m) power cord and plug, plus three 1 ft (30 cm) output power cords for pumps 230 VAC ON/OFF units provided with a 6 ft (2 m) power cord and plug and throughput connectors for hardwire connections of controlled devices...