Operating Instructions STBW 225
May 2022
Seite 4
9. Technical Specifications
Max. Switching Current:
Break Contact
16 (2.5) A at 230 VAC + 10 %
0.25 A at 230 VDC + 10 %
Make Contact TW:
6.3 (2.5) A at 230 VAC + 10 %
0.25 A at 230 VDC + 10 %
Make Contact STB:
2.0 (0.4) A at 230 VAC + 10 %
0.25 A at 230 VDC + 10 %
Min. Switching Current:
at 24 V (AC/DC) min. 100 mA
Switching Voltage:
24 – 230 VAC 50/60 Hz
24 – 230 VDC
Rated Surge Voltage:
2.5 kV
Electrical Contacts:
potential-free switch
Electrical Connection
0.75…2.5 mm² (Push In)
cable gland M 20 x 1,5 mm
Protection Class:
I
Degree of Protectiont:
IP54 housing
Release Temperature STB:
75°C (- 5 K)
Release Temperature TW:
0…120°C (preset on 50°C)
max. Head Temperature:
80°C
max. Sensor Temperature:
full scale +15%
Permitted Storage Temperature:
-30° to +80°C
Manual Reset after cooling:
about 10 – 15 K
Time Constant:
ca. 120 sec. in air
Material Sensor and Capillary:
Cu
Protective Coil:
length 200 mm
Material Protective Coil:
steel nickel-plated
complete type designation:
STBW 225 / RTKSA-011.210
Switching off can occur at ambient temperatures below 263 K.
10. Maintenance and Repair
Before commissioning and at sufficient intervals, the measuring system must be checked for functionality.
The intended effect must also be checked here. When cleaning the outside, make sure that the cleaning
agent used does not attack the surface of the plastic housing and the copper of the capillary system.
No liquid or powdery substance must get into the housing.
11. Warranty
The specified technical data was determined in a suitable testing environment and only represents the agreed
quality on this basis. The customer is responsible for checking the suitability for the intended use intended by
the customer or use under the specific conditions of use; we assume no liability for this. Subject to change.
KUNO ENGELS GmbH + Co. • Hauptstrasse 42 • D-42799 Leichlingen
Tel.:+49(0)2174/7900-0 • Fax:+49(0)2174/7900-10 • [email protected] • www.kunoengels.de