Cold Weather Catalog - Chromalox Precision Heat and Control

Controls®HTLSTwo, Three and Four-LoopHeat Tracing Line SensingControl Panel• Solid State Relay OutputsRated 30 Amps or Two-PoleContactor Control Outputs• Universal Inputs• NEMA 4/4X Enclosure• Ground Fault Alarm/TripMonitors or GFI Circuit Breakers• Programmable High/LowTemperature Alarms• Programmable Low CurrentAlarm• Optional RS-485MODBUS ® CommunicationsDescriptionThe Chromalox HTLS series panels aremicroprocessor based temperature controland monitoring units for heat tracing used infreeze protection and process temperaturecontrol applications.This series of panels can be confi gured forambient or line sensing control. The HTLSseries implement a scaleable design suchthat they can be confi gured with or withoutcommunications, ground fault monitoring orenclosure heater.This unique format offers a design that can betailored both by price and features to meet themost challenging demands in heat trace applications.For example: The HTLS series can benetworked together via RS-485 MODBUS andthe Chromalox Windows based ChromasoftSpecView software package.Two options are available for Ground FaultProtection. The Ground Fault Monitoringsystem has a reset pushbutton on the paneldoor that illuminates when a ground fault hasoccured. As an alternative, ground fault circuitbreakers are also available. Both Ground Faultsystems are rated for Equipment Protection.In the event of sub-zero temperatures, theoptional enclosure heater is available.The HTLS series have programmable inputs(thermocouple, RTD, mA, VDC), On/Off orPID control, Auto-tune function, High/Lowtemperature alarms, current alarm, and sensorfailure indication. The heat tracing circuit isswitched by a 30 Amp solid state relays ratedat 40˚C ambient or optional 2-pole contactors.The Chromalox HTLS series panel comesready to install and includes control and powerwiring terminal blocks for fi eld connections.• 120, 208, 240, and 277 VAC• Optional Heater for Sub-ZeroAmbientsApplications• Freeze Protection• Fuel Gas Preheating and Superheating• Fuel Oil Preheating• Hydrocarbon and Chemical Product Piping• Power Generation PlantsTechnical SpecificationsSupply Voltage:120, 208, 240, and 277 VacOperating Environment: 32 to 104˚F (0 to 40˚C)-32 to 104˚F (-34 to 40˚C) with enclosure heater optionCommunications: RS-485 MODBUS ®Input:Thermocouple J, K, L, N, R, S, RTD, Current, VoltageField Programmable for C or FOutput:Solid State Relay rated @ 30 amps @ 40˚C or optional2-pole contactorsCurrent Alarm (Low): 0 - 30 amps in 1 amp incrementsGround Fault Alarm Trip: 5 - 100mATemperature Alarms: Process, Deviation, Band, High/Low, Latching/Non-Latching (Manual/Automatic Reset) Programmable.Control Modes:Field Selectable On/Off, PID, Auto Tune148