ABB AK101 - Page 21

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5 ELECTRICAL INSTALLATION...
TB1
1
2
3
4
5
6
7
8
9
10
Katharometer
Unit
Gas Panel 1
(H
2
in Air)
TB1
TB2
Power Supply Unit 1
4234
LN
E
External
power supply
Note. Interconnections
marked with MUST conform to the
intrinsically safe wiring requirements
given in the text.
All other wiring to suit power and signal
requirements
+ –
Zener diode safety
barrier devices
L N E
12345678910111213141516
TB4
External bonding
and earth
TS1
Monitor
17 18
B1
4 3
TB5
TB2
Note.
Katharometer Gas Unit Panel 1 is connected internally within 6553 Gas Monitor to Upper Display
MTL 7755ac
NO
NC
COM
Alarm 1
H
2
in Air
NO
NC
COM
Alarm 2
H
2
in Air
H
2
in Air
Value
Retransmit
+ –
+
–
+
–
Fig. 5.6a Interconnection Wiring Diagram – AK104 Intrinsically Safe Analyzer System (Hydrogen Purity)