13
Chapter 2. Installation, Wiring
Example of wiring with external devices
(terminals 1–24: sub-base; terminals 25–35: front connector)
z
Flame detector: UV flame detector
Blue (F)
Yellow (G)
Flame
detection
circuit
Shutter
drive circuit
White
White
AUD300C/500C
(flame detector)
Ignition transformer
Pilot valve*
Main valve*
Flame monitor
Alarm
L1 L2(N)
Power circuit
K 2
K3
K4
10 A
5 A
K 1
Input cir
cuit
K5
Control
circuit
(CPU)
Contact reset
Interlock
Start
Input common
DC24 V
Flame voltage
output circuit
FV +
FV -
RS
-485
DA
DB
SG
Display
FL
SHUT
AL
DISP
switch
RESET
switch
Event output
(digital)
K7
K8
K6
Load
30 V DC max.
Loader
jack
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
1
2
3
4
5
6
7
8
9
10
11
12
33
34
35
8.8.
25
35
Terminal layout of connector
for front wiring
* The names used for the loads in the above diagram are for interrupted pilot systems only.
In the case of direct ignition, the pilot valve is the Lo solenoid valve, and the main valve is the Hi solenoid valve.
Handling Precautions
•
After mounting the connector for front wiring, secure it in place with the
mounting screw on the side of the connector.
•
Use the contact reset input (terminal 24) for one AUR455 only. Do not use the
terminal for contact reset input to other AUR455 devices.
•
Do not share the output common (terminals 4, 5) and the input common
(terminals 19, 20) with other AUR455 devices.
