Tranberg ThermoConnect TTC2 is the current generation of our electronic heat-tracing controllers for hazardous areas: the Chemelex RAYCHEM Elexant 5010i control unit built into a STAHL 8150/5 enclosure in acid-resistant stainless steel AISI 316L, IP66, wired and tested at our own factory. Each unit controls one single-phase heating circuit up to 16 A locally and reports to the control room over Modbus RTU. Choose the TTC2/C controller for frost protection and temperature maintenance, or the TTC2/CL controller/limiter with an IEC 61508 SIL 2 safety temperature limiter where the process must never exceed a maximum surface temperature (EN 60079-30-1). Both come with or without a 16 A safety switch.
Application
- Hazardous areas, Zone 1 and Zone 2, and safe area
- Chemical and petrochemical plants, offshore installations, industrial plants: frost protection and temperature maintenance of pipes, tanks and instruments
- According to NORSOK requirements
- Processes that must be protected from overheating (controller/limiter only)
Features and benefits
- Two RTD channels for the temperature controller; the CL version has an additional dedicated safety limiter channel
- Alarms for high temperature, high and low current, ground fault and voltage, with user-configurable ground-fault trip and warning levels that can also isolate the circuit
- Automated heat-tracing system check: the Elexant 5010i can be configured to test dormant heating cables periodically, so faults are found before the cold season and downtime on important pipelines is reduced
- Modbus RTU over RS-485, up to 247 units on one serial port; some alarms and information are available through the serial port only
- /S versions: 16 A 2-pole switch isolates the heating cable for maintenance and inspection without opening the circuit elsewhere
- Acid-resistant stainless steel AISI 316L / EN 1.4404 enclosure, IP66, −40 °C to +40 °C
Technical data (TPS7603, TPS7615)
| Type designation | STAHL 8150/5 |
|---|---|
| Control unit | Chemelex RAYCHEM Elexant 5010i (C) / Elexant 5010i Limiter (CL) |
| Ex protection | II 2(2) G Ex db eb ib mb [ib] IIC T4 Gb |
| Voltage range | 100–254 V AC ±10 %, 50/60 Hz |
| Maximum load | 16 A, single-phase |
| Temperature sensors | Two PT100 three-wire RTDs; CL versions with a dedicated third safety input |
| Wire termination (with end sleeve) | Power in max. 6 mm², heating cable out max. 4 mm², earth max. 10 mm² |
| Communication | Modbus RTU RS-485 |
| Material | AISI 316L / EN 1.4404 |
| Ingress protection | IP66 |
| Operating temperature | −40 °C to +40 °C |
| Weight | 11 kg; 12.2 kg with safety switch |
Approvals and certificates
- ATEX: PTB 09 ATEX 1109 (STAHL 8150/5)
- The controller/limiter meets EN 60079-30-1: the protective device de-energises the system independently of the controller if the maximum permissible surface temperature would be exceeded, and on sensor failure
- Datasheets, dimension drawings, certificates and user manuals are listed above the table
Sensors and accessories
Order the PT100 sensors with the controller: Tranberg PT100 three-wire sensors with 3, 5, 10 or 15 m silicone cable (−35 to +500 °C), Raychem MONI-PT100-260 with 2–25 m PTFE cable and M16 gland (−50 to +260 °C), or MONI-PT100-Exe with mineral-insulated cable for high temperatures. Mechanical protection kits and flexible hoses in AISI 316 protect the sensor cable, and the 100 Ω reference resistor (9179182) can disable the limiter channel where it is not used. For 20 A circuits, double units, wireless controllers and repeaters, see the ThermoConnect TTC.
