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Wiring
4.1
4.1.1
The wiring diagram depicted in Fig. 9 shows the connections of an instrument equipped with
all the options. Connecting the sensors to the various measuring cables is explained in more
detail in the "Measuring cables and sensor connection" section.
Fig. 9:
A
Standard sensor
B
ISFET sensor
C
Outer screen connection for glass electrodes
D
Potential matching
E
Temperature sensor
F
Signal output 1 pH/ORP
G
Signal output 2 temperature, pH/ORP or controller
H
Binary input 1 (Hold)
I
Binary input 2 (Chemoclean)
16
Electrical connection
Connection diagram
pH
A
Ref.
SRC
B
DRN.
C
S
PA/
D
PM
11
12
E
13
31
mA
F
32
33
mA
G
34
81
H
10-50 V
82
93
I
10-50 V
94
85
15 V
J
86
Transmitter electrical connection
pH
mA
~
L1
N
J
Auxiliary voltage output
K
Alarm (contact position currentless)
L
Relay 1 (contact position currentless)
M
Relay 2 (contact position currentless)
N
Relay 3 (contact position currentless)
O
Relay 4 (contact position currentless)
P
Current input 4 ... 20 mA
Q
Power supply
OPM223/253
41
42
K
43
47
48
L
49
57
58
M
59
51
52
N
53
54
55
O
56
23 +
24 -
P
=
L+
L-
Q
C07-OPM2x3xx-04-06-00-xx-001.eps
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