3.4
Electrical connection
Wiring diagram
The wiring diagram depicted in Fig. 3.10 shows the instrument connections for an oxygen
sensor. The terminal assignment of the sensor COS 21 and the cable COK 21 is shown in more
detail in Figs. 3.13, and 3.14.
Note:
•
The instrument has protection
class II and is generally operated
without protective earth
connection.
•
Mains supply voltage fluctuations
should not exceed ten percent of
the nominal supply voltage.
•
24V AC/DC models must be
supplied from an energy limiting
SELV source in accordance with
dir. IEC 1010.1 Annex H.
47
48
49
57
58
59
41
42
43
15 V
85
86
10-50 V
81
93
82
94
10-50 V
mA
31
32
mA
33
34
51
52
53
54
55
56
90
12
11
91
S
O
2
O
2
K
A
A
K
NTC
BN
YE
PK
BU
GN/YE
23 +
24 -
mA
L+
L–
N
L1
∼ =
ANO201.CDR
Auxiliary voltage
output
Digital
input 2
(Chemoclean)
Digital
input 1
(Hold)
Signal output 2
temperature
Signal output 1
oxygen
Sensor
COS 21
Alarm
(current-free
contact base)
Mains
Relay 1
(current-free
contact base)
Relay 2
(current-free
contact base)
Relay 3
(current-free
contact base)
for Chemoclean:
Water
Relay 4
(current-free
contact base)
for Chemoclean:
Cleaner
Current input
4 ... 20 mA
Fig. 3.10
Electrical connection of
Liquisys M COM 223 F /
253 F with full wiring
Installation
Liquisys M COM 223 F / 253 F
12
Hauser
