JUMO 60.2025 Panel-mounting thermostat, EM, up to 650C Data Sheet - Manual

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JUMO GmbH & Co. KG
Delivery address: Mackenrodtstraße 14
36039 Fulda, Germany
Postal address: 36035 Fulda, Germany
Phone: +49 661 6003-0
Fax: +49 661 6003-607
E-mail: [email protected]
Internet: www.jumo.net
JUMO Instrument Co. Ltd.
JUMO House
Temple Bank, Riverway
Harlow, Essex CM20 2DY, UK
Phone: +44 1279 635533
Fax:
+44 1279 635262
E-mail: [email protected]
Internet: www.jumo.co.uk
JUMO Process Control, Inc.
6733 Myers Road
East Syracuse, NY 13057, USA
Phone: 315-437-5866
1-800-554-5866
Fax: 315-437-5860
E-mail: [email protected]
Internet: www.jumousa.com
Panel-mounted Thermostat
EM Series
Special features
• Safety temperature monitor STW (STB)
• Safety temperature limiter STB
• Tested according to DIN EN 14597 and the Pressure Equipment Directive 97/23/EC
Brief description
Panel-mounted thermostats are used to monitor thermal processes. The devices are available
as safety temperature monitor STW (STB) and safety temperature limiter STB. In the event of a
malfunction, the STB switches the monitored machine to a safe operating status.
Panel-mounted thermostats operate according to the fluid expansion principle
−
a microswitch
is used as the electrical switching element.
Approvals/approval marks (see "Technical Data")
DGRL
97/23/EG
Switching function
Safety temperature monitor STW (STB)
If the temperature on the temperature probe exceeds the setpoint value, the microswitch is ac-
tivated by the transmission mechanics and the electrical circuit is opened or closed. If the tem-
perature falls below the selected setpoint (by the amount of the switching differential), the
microswitch is reset to its initial position.
Restart lock of the safety temperature limiter STB
If the temperature on the temperature probe exceeds the set limit value, the electrical circuit is
opened and the microswitch is mechanically locked. The microswitch can be manually un-
locked once the temperature has dropped by approx. 10 °C.
Self-monitoring for the safety temperature limiter STB
and safety temperature monitor STW (STB)
If the measuring system is destroyed (i.e. if the expansion fluid leaks), the pressure in the dia-
phragm of the STB drops and permanently opens the electrical circuit. Unlocking is then no lon-
ger possible. When the probe has cooled down to a temperature below approx. -20 °C, the
electrical circuit is also opened. However, it automatically closes again when the temperature
rises.
Use of the safety temperature monitor STW
as a safety temperature limiter STB
The activation lock required by DIN EN 14597 must be warranted by the following circuit dia-
gram. The circuit diagram must comply with DIN EN 50156.
Data Sheet 602026
2013-03-06/00073209