Single-Circuit Controller

The MS-2101 is a single-point, microprocessor-based electrical heat trace controller. It expands on the features of the single-circuit TraceMate to give the user additional control and flexibility in their EHT applications. MS-2101 adds interface, communication and statistics menu options to provide a comprehensive, field-ready, and easy to install EHT control solution

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MS-2101 Resources:
MS-2101 Specifications
MS-2101 Instruction Manual
MS-2100 Series Brochure
Modbus Communications Setup
Video: MS-2101 Set-up and Programming

Click Here for Features and Advantages

  • Single circuit heat trace control – monitor and operate one heat trace circuit (or combined runs) up to 30A
  • Status LEDs on the front of the unit – perfect for quick visual checks
  • Type-4X enclosure – unit is self-contained, rugged, and suitable for installation in harsh environments
  • Local tactile keypad and LCD interface – ease in programming setpoints and monitoring of measured values
  • Additional remote interface options – flexibility in method and location of programming and monitoring
  • Modbus RTU (serial), TCP/IP (Ethernet), fibreoptic, BACnet communications – allows multiple ways to integrate the controller with anyone’s SCADA/PLC/DCS system and other heat trace controllers
  • Integration with Nextron’s proprietary software – monitor and alter all parameters from the control room without having to program your PLC or DCS
  • Integrated ground fault protection – No need for external and expensive GFI type breakers
  • Heater current monitoring – detect potential heating cable issues before they become critical
  • Dual RTD input – control your heat trace circuit with one or two RTDs for flexibility of options (probes not included)
  • Proportional control – use for applications with narrow temperature tolerance MS-2101 offers ultimate flexibility with your choice of On/Off or Proportional Control strategies
  • Power Limit feature – configure the maximum heater current to not exceed your specified value
  • Soft Start feature – ramp up the heater current slowly over a programmable time interval to virtually eliminate nuisance breaker trips in the field
  • Dry alarm contact – annunciate all alarm conditions remotely in a location suitable for the end-user
  • Comprehensive alarm package – set up and monitor up to twenty (20) configurable alarm and trip conditions
  • Measured values menu – monitor eight (8) real-time measured values
  • Statistics menu – collects and provides information on eleven (11) values from operational history
  • TraceCheck feature – pulse dormant heaters on programmable intervals to flag potential cable issues early and prevent costly down-time
  • Class I, Div./Zone 2 approval – suitable for installation in hazardous environments

Product Matrix: Select elements from the left hand menu to review specific information on each Nextron product below:

          TraceMateTraceMate II-CTRMS-2101MS-2102MasterTrace
Control Points (circuits)12125 and 10 (see note 1)
Current Rating (amperage)TraceMateTraceMate II-CTRMS-2101MS-2102MasterTrace
Standard max current per circuit30 Amps30 Amps30 Amps30 Amps30 Amps
Optional max current per circuit---100 Amps100 Amps
Switching (number of poles)TraceMateTraceMate II-CTRMS-2101MS-2102MasterTrace
Single-pole switchingyesyesyesyesyes
Dual-pole switchingyesyesyesoptionalyes
Three-pole switchingnononooptionalyes
Heat Trace VoltageTraceMateTraceMate II-CTRMS-2101MS-2102MasterTrace
120-277Vacyesyesyesyes (see note 2)yes
Temperature InputsTraceMateTraceMate II-CTRMS-2101MS-2102MasterTrace
Single RTD per circuityesyesyesyesyes
Dual-RTD per circuitnooptionalyesoptionaloptional
Thermocouple per circuitnonononooptional (J, K, T)
RTD sampler (hard-wired)nonononooptional
RTD sampler (wireless)nonononooptional
Alarm OptionsTraceMateTraceMate II-CTRMS-2101MS-2102MasterTrace
Front panel visual alarm indicatorLEDLCDLCD & LEDLCD & LEDLCD & LED
Dry alarm contractyesyesyesyesyes
DC alarm contactnonoyesyesyes
Internal LED alarm type indicatoryesyesnonono
Communication OptionsTraceMateTraceMate II-CTRMS-2101MS-2102MasterTrace
Modbus RTU communicationsnonoyesyesyes
Modbus TCP communicationsnonooptionaloptionaloptional
BACNet communicationsnonooptionaloptionaloptional
Fibre-optic communicationsnonooptionaloptionaloptional
EnclosureTraceMateTraceMate II-CTRMS-2101MS-2102MasterTrace
Type-4 painted steelnoyesnonoyes
Type-4X painted steelyesnoyesyesno
Type-4X stainless steeloptionaloptionaloptionaloptionaloptional
Type-4X aluminumnonononooptional
Type-4X FRPnonononooptional
InterfaceTraceMateTraceMate II-CTRMS-2101MS-2102MasterTrace
Dip switch + jumperyesyesnonono
Liquid crystal displaynoyesyesyesyes
Vacuum fluorescent displaynonononooptional
Supervisory Windows softwareyesyesyesyesyes
EnvironmentTraceMateTraceMate II-CTRMS-2101MS-2102MasterTrace
Operating range-40C to +50C-40C to +50C-40C to +50C-40C to +50C-40C to +60C
Ordinary locationsyesyesyesyesyes
Class I, Division 2, Groups ABCDyesyesyesyesyes
Class I, Zone 2, Groups IICyesyesyesyesyes
Class II, Division 2, Groups FGnonoyesyesno
Class IIInonoyesyesno
ApprovalsTraceMateTraceMate II-CTRMS-2101MS-2102MasterTrace
yes yes (note 3)yesnono

Note 1: MasterTrace products are based on 5 and 10 circuit control module platforms multiples of which can be arranged in a single enclosure
Note 2: 208~240V dual pole MS-2102 model is a made-to-order item
Note 3: TraceMate II-CTR 208~240V unit does not carry FM approval

How the MS-2101 Series Temperature Controllers Works

MS-2101 Single-Circuit Controller

Scada System

Remote configuration and monitoring with Nextron MC100 supervisory software.

Modbus Protocol

Allows easy interfacing with our MC100 software or anyone’s PLC or DCS. Ethernet, BACnet and Fiber Optic communication protocols are also available.

Alarm Light/Audible Alarm

Form C dry alarm contact for PLC or remote alarm indication.


NEMA-4X steel, painted black, Local configuration and monitoring with Nextron MS2101 keypad.

Panel Board

All power distribution designs are compatible with Nextron control and monitoring systems for electrical heat trace. Sealed breakers can be installed in IP 65 or Nema 4/4X cabinets for hazardous/classified area installations. Alternatively, standard open frame main/branch breakers may be installed in IP 65 or Nema 4/4X cabinets with purge for hazardous/classified areas.

RTD Temperature Sensor

3 wire RTD, 22awg. PT100 ohm, IEC 571, Class A. Temperature Rating -50C to 200C. Standard Lead Length – 7 ft.

Heat Trace Cable

Nextron heat trace controllers are compatible with every type of EHT available on the market today.


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