General rules for installation
Important note: These thermostats are intended to monitor or control temperatures in gas or dust hazardous areas.
They can be installed in a variety of enclosures, and they can be explosion-proof enclosures, increased safety models, flameproof models, etc., or non explosion-proof enclosures, as long as they comply with the requirements of IP54 and above, and do not damage the integrity of “db” and “tb” based on the requirements of IEC60079-0.
However, we recommend that the electrical connection at the end of the cable be made in an EX “e” box.
For gas hazardous areas, this equipment is approved as “Ex db” and is suitable for use in zone 1 and zone 2, gas group IIC (Hydrogen/Acetylene, the highest protection group), with a temperature classification T5/ T6;
For dust hazardous areas, this equipment is approved as “Ex tb”, suitable for use in zone 21 and zone 22, the dust group is IIIC (electric conductive dust, the highest protection group).
The applicable ambient temperature of the equipment is:
NC: 16(4)A NO: 10(2)A, 125/250/400 VAC; 50/60 Hz; -60°C to +50°C (T6/T80°C)
NC: 16(4)A NO: 10(2)A, 125/250/400 VAC; 50/60 Hz; -60°C to +80°C (T5/T95°C)
NC: 25(4)A NO: 15(2)A, 125/250 VAC; 50/60 Hz; -60°C to +50°C (T5/T95°C)
The outlet of the capillary from this box must be carried out by a cable gland with a gasket adapted to the 6mm diameter of the capillary connection fitting and providing the degree of protection required by the standard.
The models with screw driver adjustment and front mounting allow incorporation inside most existing junction boxes in having inside a free height of 65mm minimum above the DIN rail.
With an adjustment per 10mm shaft and printed knob, this minimum height is about 75mm. We recommend checking this height by requesting plans for the devices with the knob of your choice.
Approvals
These thermostats are certified:
ATEX: TÜV 22 ATEX 8892 X; IECEx: IECEx TUR 22. 0057 X. CCC: 2025012304765427
Housing: Aluminum, 86 × 40 × 64mm (Dimensions without shaft and knob)
Bulb and capillary: Stainless steel. Standard capillary length 1500mm. (Other lengths available with M.O.Q) Capillary minimum bending radius 5mm.
Temperature sensing element: Oil or liquid metalloids filled bulb and capillary.
Electrical connection: Silicone insulated wires H05S-K, 2.5mm², T180°C, 450V, standard length 200mm. Wire ends with crimped terminals. Other lengths on request.
Ground terminals: One M4 grounding terminals with saddle is located on the wire exit side.
Mounting: Rear side, on symmetrical 35mm DIN rail
Contacts: SPDT, snap action contact. Electrical life 100,000 cycles.
Electrical rating: Suitable for power control, remote control of relay coils or PLCs circuits.
These devices use silver contacts or silver alloy contacts. Due to the possible oxidation of the contacts in time, we do not recommend the use of AC or DC low-voltage circuits (24V or less) if the switched intensity is less than 100mA, or the switched power less than 800mW. Contact us for those applications that require gold-plated contacts. The electrical ratings given are normalized resistive circuit values.
Options
- Capillary sleeved with 6mm diameter stainless steel flexible tube
- Capillary with fitting for 6mm cable gland gasket, with or without capillary sleeving in stainless steel
Mechanical life:
> 500,000 cycles
Classification
Gas: Ex II 2G Ex db IIC T5/T6 Gb
Dust: Ex II 2D Ex tb IIIC T95°C/T80°C Db
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