Terminal arrangement ClO
2
valve
+
-
XR3:7
XR3:11
XP1:11
XP1:7
XP1:3
230 V
24 V
1
3
2
4
1
5
2
6
3
7
4
8
A1
A2
9
10
1
1
12
L
N
PE
Terminal arrangement Bello Zon
®
type CDLb without internal pre-storage
vessel
Control inputs
Signal
Terminal identi‐
fier / Pin
LED identifier
Type of contact
Remarks
Metering vessel acid full
XK2/1,2
MS
NC
XK2/2 = GND
Metering vessel chlorite
full
XK2/3,4
MN
NC
XK2/4 = GND
Pre-storage module over‐
flow
XK3/1,2
VUE
NC
XK3/2 = GND
Pre-storage module new
batch
XK3/3,4
VM
N/O
XK3/4 = GND
Acid vessel low
XK4/1,2
SW
N/O
XK4/2 = GND
Acid vessel empty
XK4/2,3
SL
N/O
XK4/4 = GND
Chlorite vessel low
XK5/1,2
NW
N/O
XK5/2 = GND
Chlorite vessel empty
XK5/2,3
NL
N/O
XK5/4 = GND
Mixer vessel water pre-
storage
XK6/1,2
MR
N/O
XK6/2 = GND
Mixer vessel diluting water XK6/3,4
MV
NC
XK6/4 = GND
Mixer vessel overflow
XK7/1,2
MUE
NC
XK7/2 = GND
Wiring diagram CDLb
67