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4.3 Connections – Wall-/Pipe-mounted Instruments – Fig. 4.4
Note. Refer to Fig. 4.1 for Access to Terminals.
Caution. Slacken terminal screws fully before making connections.
1
2
3
Channel 1
Channel 1
Channel 2
1
Electrode System
Temperature Compensator
5
1
–
2
–
6
Glass (inner core)
7
3
–
4
–
Reference (black)
Coax Screen
Earth Stud (on case) –
see Fig. 4.1
2
Warning. The power supply earth (ground) must be connected to ensure safety to personnel, reduction of the
effects of RFI interference and correct operation of the power supply interference filter terminal.
1
p
H
E
e l
t c
o r
d
e
S
y
s
e t
m
y T
p
e
7
6
0
0
S
r e
e i
s
2
8
6
7
D
p i
S
s y
e t
m
s
7
6
7
0
F
o l
w
S
s y
e t
m
s
2
8
9
1
I
m
m
e
s r
o i
n
S
s y
e t
m
Refer also to Table 4.1 for connection details on different electrode types.
1
2
4
5 6 7
4
5
Channel 2
Serial/Modbus
nd
or 2
Retrans.
output
Serial/Modbus
–
–
See Table 4.1
–
A
u
o t
m
t a
c i
M
a
n
e T
m
p
e
a r
u t
e r
e T
m
p
e
C
o
m
p
e
n
s
t a
o i
n
C
o
m
p
e
n
P
a
t r
n
. o
0
3
1
2
6 -
4
2
P
a
t r
n
. o
9
N
t o
a
p
p
c i l
a
b
e l
P
a
t r
n
. o
9
N
t o
a
p
p
c i l
a
b
e l
P
a
t r
n
. o
9
P
a
t r
n
. o
0
3
1
2
6 -
4
2
P
a
t r
n
. o
9
Fig. 4.4 Connections – Wall-/Pipe-mounted Instruments
4 ELECTRICAL CONNECTIONS...
3
+
–
6
Retrans.
output
Retransmission
(If fitted)
Output
RS422/
RS485
1
–
+
Retrans.
2
–
Rx+
–
Output
3
–
Rx–
4
–
Tx+
5
–
Tx–
6
–
0V
nd
2
Retrans. output
(If fitted)
4 +ve
5 –ve
u
l a
a r
u t
e r
s
t a
o i
n
1
7
0
3 -
1
0
1
7
0
3 -
0
0
1
7
0
3 -
0
0
1
7
0
3 -
1
0
1
2
3
N
L
4
5
6
Relay 1
Power
Relay 2
Supply
Relay 1
Relay 2
Relays
1
–
NC
2
–
C
Relay 1
3
–
NO
4
–
NC
Relay 2
5
–
C
6
–
NO
=
NC
Normally Closed
=
C
Common
=
NO
Normally Open
2
Information. The colours relate
to the multicore cable from the
electrode system – see Table 4.1.
Note. When using 2867 Dip
Systems or Redox cartridge systems,
the screen is connected to terminal 4.
Power
Supply
Mains Supply
N
–
Neutral
L
–
LIne
–
– Earth
Earth Stud
(on case) –
see Fig. 4.1
9
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