Siemens RVW26.000B27 User Manual

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Siemens Building Technologies Electronic Air / Fuel Ratio Control System CC1P7873.1en
HVAC Products 8 Block circuit diagram 15.10.2002
8 Block circuit diagram
Q1
L
N
S1
RVW26
Fuel1
Fuel2
S2
QUIT
78731a03/0601
4)
3)
2)
Q4
Y5
Y6
F1
F2
Y10
Y20
Q2
Q3
Q5
6)
5)
1)
17)
Test
AZW20.20
14)
15)
TxD
U10
M
EEPROM
(RZD20)
12)
B4
B3
B2
U3
11)
10)
TxD
D
9)
R1
R3
R3
R2
R2
R2
R2
RxD
SA5
SA6
Microprocessor
A
temp
D
A
X3
X1
R4
G
Y8
16)
SA5
SA6
SA7
(AUX1(1))
18)
H
U1
X2
Y3
Y4
Watch
dog
M
M
FU
(AUX1(2))
(AUX2)
Detect Terminal
SA7
M
%
7)
1
2
PROM
8)
P
P
P
RxD
GND
Fig. 17 Block circuit diagram
1) Mains transformer with built-in thermal 11) Inputs from feedback potentiometers
cutout (inputs «B2» and «B3» are switched
2) Fuse «S1» for outputs internally, according to the type of fuel
«Y3...Y4» and «Q1» currently burnt)
3) Acknowledge relay with contact «Q1» 12) Data memory as an
4) Readiness relay with readiness contact exchangeable plug-in module
«Q4...Q5», «H» and fuse «S2» 14) Socket for the
5) Mains voltage inputs with optocoupler handheld terminal AZW20.20
6) Control outputs 15) Interface output for RVW25.000B27
7) Display on the front of the unit 16) Actuators «SA5...SA7» with
8) Program memory feedback potentiometer
9) Signal output «X1» (burner output 17) Signal input «U1» DC 0...10 V for
DC 0...10 V) with D / A converter controlling the burner output
10) Signal input «X2» (correcting variable 18) Signal input «U3» DC 0...10 V for the
DC 0...10 V, e.g.
O2 trim control) required speed of the speed
controller of the RVW25...
Legend

Siemens RVW26.000B27 Specifications

General

Brand	Siemens
Model	RVW26.000B27
Category	Control Systems
Language	English