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Siemens 8MR2170-1K Serie Betriebsanleitung Seite 4

Temperaturregler

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Einstellhinweise
Hysterese (Schalttemperaturdifferenz): a), b), d) und e) 7K (± 4K Toleranz) / c) 5K (-3/+2K Toleranz) Durch
anschließen des RF Heizwiderstands (thermische Rückführung) wird die Hysterese verringert. Bei der
Temperatureinstellung des Öffners/Schließers muß die größt-möglichste Hysterese angenommen werden.
DE
Beispiel
• Öffner: Eingestellter Wert minus max. Hysterese (11K) = Einschaltpunkt Heizung.
• Schließer: Eingestellter Wert minus max. Hysterese (11K) = Ausschaltpunkt Lüfter
USAGE
The temperature controls are used to regulate heating equipment, cooling equipment, filter fans and heat
exchangers in closed enclosures. In addition, they can also be used as switching contacts(min. 24V, 20mA)
for signal devices used as low- or high-temperature alarms.
Versions
• a) Normally closed contact (switching contact opens at rising temperature)
• b) Normally open contact (switching contact closes at rising temperature)
• c) Change-over contact (switching contact opens one and closes the other contact at rising
temperatures)
• d) Combination (combination of a) and b))
• e) Combination (combination of b) and b))
Safety considerations
• Installation must only be performed by qualified electrical technicians in observation of he respective
national power-supply guidelines (IEC 60364).
• The safety measures according to VDE 0100 are to be ensured.
• The technical specifications on the type plate must be strictly observed!
• The device must not be repaired.
EN
• The contact system of the regulator is exposed to environmental influences. This can result in a change in
the contact resistance, which can lead to a drop in voltage and/or self-warming of the contacts.
• The clamping screw must be turned in all the way on a terminal without connected wire.
• Notice: From an ambient temperature in the electric cabinet of 70°C (158°F), a heat-resistant cable must
be used to connect the thermostat.
Installation guidelines
• The regulator should be installed in the upper area of the electric cabinet as far as possible from heaters
or other heat-generating components.
• The device must not be covered.
• The device must not be operated in environments with aggressive atmospheres.
Setting recommendations
Hysteresis (switching difference): a), b), d) and e) 7K ± 4K (Kelvin) / c) 5K +2/-3K (Kelvin). Upon connection
of the RF heating resistor (thermal coupling), the hysteresis is reduced. When setting the temperature of
the thermostat, the largest possible hysteresis must be allowed for.
Example
• Normally closed contact: Set value minus max. hysteresis (11K) = switch on point for heater.
• Normally open contact: Set value minus max. hysteresis (11K) = switch off point for fan.
4
L1V30033532A-04

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