Chromalox IntelliTrace CTC Commercial Heat Trace Controller


  • 1 & 2 Circuit Models
  • 40 Amps per Circuit
  • SSR Control
  • 100– 277 VAC, 50/60 Hz
  • cULus Non-Hazardous Areas
  • Soft Start Feature
  • Operating Temperature:-40˚F to 104˚F (-40˚C to 40˚C)
  • Modbus RTU/RS485, RS422, TCP/Ethernet, & BACnet
  • 10” x 8” x 6” (26cm x 21cm x 15cm) NEMA 4X FG Wall Mount Enclosure
  • High-Resolution Color TFT Display
  • LED Indication for Power, Load & Alarm per Circuit
  • Front Panel Capacitive Touch Switches
  • PID, On/Off or Manual Control Modes
  • One or Two Sensor Inputs / Circuit– Min, Max & Averaging
  • 2 Circuit Ambient Control from 1 RTD Sensor
  • Full Monitoring & Alarms
  • High / Low Temperature & Current, GFEP & Sensor Failure
  • Programmable Duty Cycle On Sensor Failure
  • AC & DC Alarms
  • Password Protected Security Levels

The Chromalox intelliTRACE CTC is a microprocessor-based system with SSR power control that switches 40 Amps per circuit at 120-277 VAC. The CTC is a single or dual point commercial heating cable controller with integrated ground-fault protection. This controller may be used with CZH, CMi, or CPR heating cables. The CTC is intended for use in commercial non-hazardous applications. There are three user-selectable control modes available on the CTC: Manual, Off, or Auto. An output of 1% to 100% is available while in Manual Mode and you may choose either PID or ON/OFF control while in the Auto Control Mode. You may employ one or two RTD sensors per circuit. When using two RTD sensors, the CTC may be set to Low, High, or Average. The CTC may also be configured as a 2-circuit ambient sensing controller that uses only one RTD to control both circuits. This provides the owner with much more flexibility and redundancy to help meet their ever-varying demands. The CTC employs a soft start feature that uses a proprietary software algorithm which reduces the inherent self-regulating in-rush current, resulting in less nuisance tripping at cold temperatures. The soft-start feature is selectable which allows this controller to be employed in non-heat trace applications as well.

All process conditions may be monitored and managed both locally and remotely. All process variables, communication and alarm settings and security codes are user-adjustable via simple page menu navigation. In terms of system supervision, the CTC controller monitors temperature, current load and ground fault equipment protection leakage current (GFEP). Additionally, the alarms on the CTC consist of high and low temperature, high and low current, high GFEP current and sensor failure. Should the CTC unit realize a failed sensor, the controller automatically switches into a user-adjustable manual output duty cycle. To eliminate abrupt current spikes, the Chromalox CTC employs bumpless transfer power switching when switching over from either manual or auto mode. The CTC unit is housed in a compact wall mountable, NEMA 4X FG or optional 316 SS enclosure and it features a high-resolution TFT display, LED indication of Load, Power & Alarm status for each circuit and front panel capacitive touch user interface buttons which are mounted on a hinged door. The CTC enclosure provides electrical connections for the heating cable, the AC Power and the RTD Sensors and it comes complete with stainless steel mounting brackets.



Sensor Type 3-wire RTD, 100 W PT, 0.00385 W/W/˚C, 20 W balanced lead wire
Number of Sensor Inputs 1 or 2 per Circuit
Sensing Configuration Range:  Single, Low, High, Average, Use RTD1 to control both circuits
Power Switching SSR
Number of Circuits 1 or 2
Capacity. 40 Amps per Circuit
Control Types
PID Control mode must be set to Auto
Autotune On or Off
Proportional Band, (˚F) Range:  1 – 100
Integral (sec/repeat) Range:  0 – 9,999
Rate or Derivative, (seconds) Range:  0 – 500
On/Off Control mode must be set to Auto
Dead band, (˚F) Range:  2 – 100
Manual Range:  0 – 100%
Soft Start, Current Clamping Enable or Disable
Temperature (PV) Range: -80˚F to +1100˚F (-62˚C to +593˚C)
Low Temperature Alarm Range:  -80˚F to +1050˚F, Off (-62˚C to +566˚C, Off)
High Temperature Alarm Range:  -80˚F to +1150˚F, Off (-62˚C to +621˚C, Off )
Low Current Alarm Range:  0.1 A – 50.0 A, Off
High Current Alarm Range:  0.1 A – 50.0 A, Off
GFEP Range:  30 mA – 150 mA
GFEP Alarm Condition Alarm Only, Alarm & Trip, Alarm & Latch, Alarm & Trip & Latch
Output on Sensor Failure Range: 0–100%, Bumpless Transfer to Manual Mode
Calendar Year, Month, Day, Date, Hour & Minute
Audible button depress Range: On, Off
Security 3 Levels of password protected security
Alarm State Normally Open, Normally Closed
Display, HMI, Indication
Display 3.5” 320 x 240 RGB Full color graphic TFT module
Human Interface 5 Capacitive Touch Input Buttons
LED Indication Power (Green), Load (Amber), Alarm (Red) – Per Ckt
Alarm Types Low & High Temperature, Low &  High Current, High GFEP, Sensor Failure
Alarm Relays 1 x DC Alarm Output, 1.8 Amp, 0 – 50 VDC
1 x AC Alarm Output, 1.8 Amp, 12 – 240 VAC
Alarm Contact State Mode Default Optional
Normal Operation Closed Open
Alarm Condition Open Closed
Power Off Open Open
 Modbus RTU/RS-485 (2 or 4 wire)
 Modbus TCP/Ethernet (optional)
Webserver/Ethernet IP (Optional)
BACnet Communications (Optional)
Operating & Environmental 
Temperature -40˚F to 104˚F  (-40˚C to 40˚C)
Power Supply 100 to 277V 50/60Hz
 Protection IEC IP66
Enclosure rating NEMA 4X FG (Optional Stainless Steel)
Approvals UL/cUL Ordinary Area Locations. (UL File: E84610)

Ordering Information


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