Siemens siemens compact universal controllers Measurement range Or 3-wire resistance Pt100 / IEC

Function of the controller when used for burner control (cont´d)

Analog input 1 (actual value sensor)

Analog input 2 (external setpoint shift or external setpoint)

To acquire the actual value, a number of sensors can be connected to the RWF40...

				Measurement range
2-or 3-wire resistance	Pt100 / IEC 751			-200...		+850 °C (-328...			+1562 °F)
sensors	Pt1000 / IEC 751			-200...		+850 °C (-328...			+1562 °F)
	Ni100 / DIN 43760			-60...		+230 °C (-76...		+482 °F)
	Ni1000 / DIN 43760			-60...		+230 °C (-76...		+482 °F)
	LG-Ni1000			-50...		+160 °C (-58...		+320 °F)
Thermocouples	NiCr-Ni / type «K»			-200...		+1372 °C (-328...				+2502 °F)
	Cu-Cu-Ni / type «T»			-200...		+400 °C (-328...+752 °F)
	NiCroSil-NiSil / type «N»			-100...		+1300 °C (-148...				+2372 °F)
	FeCuNi / type «J»			-200...		+1000 °C (-328...				+1832 °F)
	Pt-RhPt / type «S»			0	...1768 °C (-32...		3214			°F) ¹)
	Pt-RhPt / type «R»			0	...1768 °C (-32...		3214			°F) ¹)
	Pt-RhPt / type «B»			0...	1820 °C (32...3308 °F) ¹)
Linearized standard	0	...20 mA		scalable -1999...			+9999
signals	4	...20 mA		scalable -1999...			+9999
	DC 0		...10 V	scalable -1999...			+9999
	DC 0		...1 V	scalable -1999...			+9999

¹) Only RWF40.0X2B97

The power provided for the measuring transducers is DC 24 V / 30 mA.

Feeding a signal to analog input 2, the controller´s setpoint can be influenced. The influence can be scaled.

The following signals can be used:

-Input signals DC 0...1 V, DC 0...10 V, 0...20 mA, 4...20 mA

-1 kΩ potentiometer in a 2-wire circuit

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Building Technologies	CC1N7865en
HVAC Products	01.09.2005