Description Of The Inputs / Outputs - Siemens RVW26.000B27 Basic Documentation

Terminal Input / output
B2 I
B3 I
B4 I
F1 I
F2 I
L I
N I
M
Q1 O
Q2 I
Q3 I
Q4 – Q5 / H O
TxD O
RxD I
GND
U1 I
U3 I
U10 O
X1 O
X2 I
X3 O
Y3 O
Y4 O
Y5 O
Y6 O
Y8 O
Y10 I
Y20 I
+5 V O
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Siemens Building Technologies
HVAC Products

9.2 Description of the inputs / outputs

Voltage
DC 0...10 V Potentiometer (wiper ) from auxiliary actuator (AUX1(1))
DC 0...10 V Potentiometer (wiper) from auxiliary actuator (AUX1(2))
DC 0...10 V Potentiometer (wiper) from auxiliary actuator (AUX2)
AC 230 V Fuel selection: Fel 1
AC 230 V Fuel selection: Fuel 2
AC 230 V Live for internal power supply, actuator outputs and «Q1»
Neutral conductor for internal power supply, reference potential for the mains
voltage inputs (all N-terminal are internally interconnected)
Reference potential for all low voltage inputs / outputs and for the screening
(all M-terminals are internally interconnected)
AC 230 V Acknowledge signal: Indicates to the burner control when certain actuator posi-
tions are reached
AC 230 V Signal from burner control: First fuel valve on / off
AC 230 V Signal from burner control: Fan on / off
potential free Readiness contact / control loop: Indicates operational readiness of the
RVW26...
Interface for the RVW25.000B27
Interface for the RVW25.000B27
Reference potential for the interface
DC 0...10 V Signal input for analog burner output control
DC 0...10 V Signal input for predefined speed from the RVW25...
DC 10 V Power supply for potentiometers (all «U10» terminals are internally intercon-
nected)
DC 0...10 V Burner load signal
DC 0...10 V Correcting variable signal from O
DC 0...10 V Predefined speed for the variable speed drive
AC 230 V Positioning signal (open) for actuator «AUX1»
AC 230 V Positioning signal (close) for actuator «AUX1»
AC 230 V Positioning signal (open) for actuator «AUX2»
AC 230 V Positioning signal (close) for actuator «AUX2»
AC 230 V Positioning signal for the RVW25..: valve «ON / OFF»
AC 230 V Signal for prepurging from the burner control
AC 230 V Signal for ignition position and «CLOSE» position from the burner control
DC 5 V Auxiliary voltage, max. 1 mA
Electronic Air / Fuel Ratio Control System
9 Assignment of terminals and description of inputs / outputs (I / O)
Description
trim control of the RPO25...
2
CC1P7873.1en
15.10.2002