18
Exter
nal
power supply
TB1
1
2
3
4
5
6
7
8
9
10
Kathar
ometer
Unit Gas Panel 2
%H
2
and Air
in Purge Gas
TB1
1
2
3
4
5
6
7
8
9
10
Kathar
ometer
Unit
Gas Panel 1
(H
2
in Air)
TB1
TB2
Power Supply Unit 2
4234
LN
E
TB1
TB2
Power Supply Unit 1
4234
LN
E
Exter
nal
power supply
Note
. Inter
connections
marked with
M
UST conform to th
e
intrinsically safe wiring r
equir
ements
given in the text.
All other wiring to s
uit power and signal
requir
ements
+
–
+ –
Zener diode safety
barrier devices
Connections for Lower Display
Connections for Upper Display
L N E
123456789
1
0
11
12
13
14
15
16
TB4
NO
NC
CO
M
Remote
Range
(AK101 only)
H
2
in Purge Gas*
or
Air in Purge Gas*
Alarm 1
Purge Gas V
a
lue
Retransmission
+ –
123456789
1
0
1
1
1
2
1
3
1
4
1
5
1
6
Exter
nal bonding
and earth
TB3
Monitor
17
18
19
20
B1
4 3
B2
4 3
TB5
TB6
TB2
Note.
Kathar
ometer Gas Unit Panel 1 is connected inter
nally within 6553 Gas
M
onitor to Upper Dis
play
.
Kathar
ometer Gas Unit Panel 2 is connected inter
nally within 6553 Gas
M
onitor to Lower Dis
play
.
M
TL 7755ac
NO
NC
CO
M
Alarm 1
H
2
in Air
NO
NC
CO
M
Alarm 2
H
2
in Air
H
2
in Air V
a
lue
Retransmit
B3
4 3
+
+
–
–
–
+
–
Common
Range 3
Range 2
Range 1
+
–
...5
ELECTRICAL INSTALLATION
Fig. 5.6 Inter
connection Wiring Diagram – AK101 Intrinsically Safe Analyzer System (Hydr
ogen Purity and Pur
ge Gas)
*Note
. Purge gas options include:
CO
2
(Carbon dioxide)
N
2
(Nitr
ogen)
Ar
(Argon)
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