4 - 5
Power Supply and Grounding
4-6
■
Power supply
To supply power to the
DCP551
, use an instrument-dedicated single-phase power
supply subject to minimal electrical interference.
Handling Precautions
• If electrical interference proves excessive, we recommend adding an
insulating transformer and/or using a line filter.
Azbil Corporation model no.: 81442557-001
• After carrying out interference reducing measures, do not bundle the
primary and secondary power supply coils together or insert them in the
same conduit or duct.
■
Grounding
If grounding the shield wire or other lines proves difficult, ground them separately
to a grounding terminal block.
Ground resistance : Less than 100
Ω
Conductor
: Annealed copper wire, min. 2mm
2
(AWG14)
Max. Length
: 20m
Handling Precautions
To ground the
DCP551
, connect the FG terminal (terminal
(52) or (53)
)
to a single ground point without jumpering.
3
1
E
2
4
Recommended product
81442557-001
Line filter
Other circuits
100 to 240Vac
50/60Hz
200/200V
100/100V
Insulating transformer
Instrument power supply
Grounding
Grounding
DCP551
GND
53
or
39
40
52
Chapter 4. WIRING
DCP551
or
53
Grounding terminal block
FG terminals
Less than 100
52
Shield
