YOKOGAWA EXA DO402G, Руководство пользователя

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<3. Installation and Wiring>
3-9
IM 12J05D02-01E
71
S4 S3 S2 S1
C NC NO
72 73 51 52 53 41 43 31 33 42 32
FUSE
100
115
230
250VAC; T
3 1 2
C NC NO C NC NO C NC NO
VAC
VAC
VAC
200 mA
200 mA
100 mA
Relay Contacts
Power Supply
12 13 15 16
63 66 65 62 61 95 94 93 92 91
SCREEN
mA2
mA1
SCREEN
TL TL
17 11
Sensor Inputs mA Outputs
Digital
Communications
Contact
Input
CONT SENSOR mA OUTPUT RS485
14
22
21
- - - optical sensor and polarographic sensor galvanic sensor
High voltage compartment
G N L
18
Liquid
earth Shield
Temp
SCREEN
99
SCREEN 2
23
250VAC
5A
100VA
250VDC
5A
50W
Figure 3.9 Input and output connections
Connect terminal 1 to the phase line of the AC power and terminal 2 to the zero line. The size of
conductors should be at least 1.25 mm
2
. The overall cable diameter should be between 6 & 12
mm (0.24 & 0.47 in).
3.3.4 Grounding the housing
WARNING
Protective grounding must be made to prevent electric shock.
To protect the instrument against interference, the housing should be connected to ground by
a large area conductor. This cable can be fixed to the rear of the housing using a braided wire
cable. See figure 3.10. This is separated from input ground by a galvanic isolation.
The internal grounding terminal is not the protective grounding terminal.
CAUTION
Please be sure to connect protective grounding of DO402G with cable of 1.25 mm
2
or larger
cross section in order to avoid the electrical shock to the operators and maintenance engineers
and prevent the influence of external noise. In addition, use cables whose colors are green and
yellow stripes.
And further connect the grounding wire to the mark (100 Ω or less).
9th Edition: Aug. 05, 2015-00