Elexant 3500i electronic thermostat for heat tracing control - Raychem

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Elexant 3500i electronic thermostat for heat tracing control - Raychem


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Lead time: Available September 2026


Product details

Chemelex has introduced the new Raychem Elexant 3500i family of electronic thermostats, delivering flexible, connected, and reliable heat tracing control for industrial applications. Available in wall-mounted and pipe-mounted configurations, the Elexant 3500i combines fast installation with advanced features, including Bluetooth and RS-485 connectivity, alarming, current sensing, ground fault detection, and automated 24-hour system checks. Configuration is simple with the Elexant Connect App, while Modbus RTU communication enables seamless integration with distributed control systems (DCS). The configurable platform allows users to select the functionality they need, helping reduce installation costs, improve system reliability, and minimize downtime 


Available in 5 interchangeable variants - wall mounted (W-E) or pipe mount (P-E)

Variant
(Elexant-35001-)
Standard
(ST*)
Alarm
(AR*)
Commmunicating
(C*)
Current Sensing
(I*)
Groud Fault Detecting
(GF*)
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Quick connectasset-2-9.jpgasset-2-9.jpgasset-2-9.jpgasset-2-9.jpgasset-2-9.jpg
Local indicator lightasset-2-9.jpgasset-2-9.jpgasset-2-9.jpgasset-2-9.jpgasset-2-9.jpg
Alarm relay
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Temperature sensors11122
Secured configuration

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Central communication

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Auto-test


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Load sensing


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Explore the features and benefits of Elexant 3500i:

Fast Installation, minimal components
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  • quick connect terminals for fast, secure cable connection
  • power connection and thermostat in one unit, for up to two Raychem heating cables
  • robust wall mounted or pipe stand enclosures, minimizing components and tools
  • approved to 32 A and 277 Vac for longer heating cable lengths
Flexible design, reliable performance
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  • five variants with electronic module - from local indication light, to remote communication with current and ground fault sensing
  • interchangeable electronic modules for hassle free upgrades
  • globally approved for hazardous areas in extreme environments -55°C to +60°C
  • hybrid switching realy (SSR+EMR) rated to 250,000 power cycles for superior product life (IEC 60079)
Easier installation. Secured configuration
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  • data secured, password protected configuration with Raychem Elexant Connect mobile App
  • intuitive user interface
  • improved Bluetooth BLE connection (range up to 40 metres)
  • power daisy chain capability, reduces infrastructure cost
Full connectivity. Anytime. Anywhere
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  • seamless integration with existing Elexant controllers, Raychem Supervior and client DCS system
  • automated heat trace circuit self test check, real time monitoring, data analytics and alarm management, reduces manual field interventions


  • TECHNICAL DETAILS

    Environmental
    ComplianceRoHS and Reach
    Area of Usenon-hazardous area
    hazardous areas Zone 1 and Zone 2 (Gas) Zone 21 and Zone 22 (Dust)
    Temperature classificationT4
    Exposure temperature range-55°C to +60°C
    Storage temperature range-55°C to +80°C
    Relative humidity0 to 90% non-condensing
    Maximum altitude2000m
    Maximum pipe temperature205°C
      
    Electrical
    Supply voltage100 V AC to 277 V AC ±10% 50/60 Hz
    Power consumption15 VA
    TerminalsL,N & PE: 6 x 25 mm² 
    alarm: 2 x 2.5 mm²
    sensor: 4 x 2.5 mm² (standard, alarm & communicating variants)

    sensor : 8 x 2.5 mm² (current sensing & ground fault detecting variants)
    RS-485: 3 x 2.5 mm²  
    Current, maximum32 A @ 40°C linearly derated to 24A @ 60°C
    Alarm relay2 A / 100 V AC to 277 V AC, programmable 
    Temperature range controller-17°C to 550°C (-ST & -AR variants)
    -55°C to 550°C (-C & -I and -GF variants)
    Voltage measured100 Vac to 277 Vac, 50-60 Hz,  +/- 10%
    Load current measuredLow current alarm threshold (0.1 A)
    Ground fault current30 mA to 50 mA. UL1053 compliant
    Heater time alarmfrom 1 to 1 x 10hours
    Relay cycle alarmfrom 0 to 2 x 10hours
    Electrical safetyEN 61010-1, Category III, Pollution degree 2
    Vibration and ShockShock 1/2 sine wave of 11 ms duration, 15 g
    Vibration sine wave 10 to 150 Hz (p-p), 2 g
    Programming 
    Method1. handheld programming device and wireless Bluetooth connection via Elexant Connect software
    2. RS485 interface and chemelex® Raychem Supervisor software
    3. chemelex® Raychem User Interface Terminal (NGC-UIT) or Touch1500 and chemelex® Raychem software
    Unts of measure°C or °F, software selectable
    Memory

    Non-volatile, no loss of parameters after power outage or long term shut down, data holding time ~ 10 years

    LED indicators Elexant 3500iGreen ON - Power on, heating off
    Green On/Off - Power on, heatig on, limiter output on
    Yellow ON - High temperature, low temperatue, low current, GF alarm, Cycle count, Heater on time alarm
    Red ON - Sensor fail,swich fail, limiter trip, high temperature cutout, internal failure, ground fault trip, GF CT trip
    Alarm conditionsLow / High temperature, low current, RTD failure, loss of programmed values, ground fault alarm, ground fault trip, relay failure, limiter trip, relay lifetime exceeded, heat trace cable lifetime exceeded
    Communication 
    Communication portRS-485 and Bluetooth BLE 5.1 encrypted
    Type2-wire RS-485
    CableOne shielded twisted pair 0.5 mm² (not included)
    Lengthup to 1,200 m
    Quantityup to 247 devices per port
    ProtocolModbus RTU
    Enclosure
    MaterialGlass fibre reinforced with internal earth plate
    Ingress protectionIP 66 per IEC-60529
    EntriesWall mount: 4 x M25 pre-drilled (plugged)
    Pipe mountingDirect pipe mount:  1 x integral pipe standard, 2 x M25 entries pre-drilled (plugged)
    Sensors (standard - must be ordered separately)
    TypePT100 3 wire

    Raychem MONI-PT100-260/2
    Raychem MONI-PT100-260/5
    Raychem MONI-PT100-260/10
    Raychem MONI-PT100-EXE
    Raychem MONI-PT100-EXE-SENSOR
    Raychem  MONI-PT100-EXE-AMB

  • APPROVALS
    APPROVALS
    ATEX, IECEx



  • DIMENSIONS
    DIMENSIONS AND WEIGHT
    Width206 mm
    Height160 mm (excluding pipe mount)
    282 mm (including pipe mount)
    Depth90 mm
    Weightpipe variants: 3.4 kg
    wall mount variants: 2.9 kg

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