Siemens siemens compact universal controllers manual RWF40, Function

Function

The RWF40... provides the following functions:

-One digital PID controller with a 3-position or analog output (optional)

-To control 2-stage burners, the RWF40... can be switched over to provide 2- position control

-Automatic thermostat (or pressurestat) function in low-fire operation

-One shift controller for weather-dependent setpoint shifting

-One minimum limiter and one maximum limiter for the boiler temperature or the boiler pressure

-One limit thermostat to DIN 3440 (output 1)

-One potential-free configurable contact

-Manual operating mode

-Communication via serial port (option)

-Self-setting function

Block structure	3 analog inputs
	Input 1:
	Actual value
	for Pt100, Ni100, Pt1000,
	LG-Ni1000,
	thermocouples
	or standard signals
	Input 2:
	External setpoint,
	setpoint shifting
	for 0...1 kΩ resistor
	or linearized
	standard signals
	Input 3:
	Outside temperature
	for Pt1000, LG-Ni1000
	2 binary inputs
	For potential-free
	contacts
	Input 1:
	Operating mode changeover
	Input 2:
	Setpoint shifting /
	changeover
	Power supply
	AC 110 ...240 V +10%/-10%,
	48...63 Hz, max. 10 VA
	7865f01e/0905

RWF40...

Release of burner

Output 1:

- Relay (N.O. contact)

Floating output

Output 2:

-Relay (actuating device open)

Output 3:

- Relay (actuating device closed)

Limit comparator

Output 4:

- Relay (N.O. contact)

Power supply measuring transducer

DC 24 V, 30 mA (short-circuit proof)

Analog output (optional)

Output 5:

Analog output

DC 0...10 V, DC 0...20 mA,

DC 4...20 mA

Serial port (optional)

RS-485

MOD bus protocol

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Building Technologies	CC1N7865en
HVAC Products	01.09.2005