16
Recommended Cable
Use the transmission cables shown below for Eco-POWER METER RS485 communication system.
Cable
Conductor
Insulator
Cable
diameter
Applicable cable
Size
Resistance
(at 20
℃)
Material
Thickness
Twisted-
pair
with shield
1.25 mm
2
(AWG16)
or more
Max.16.8
Ω
/km Polyethylene Max.
0.5 mm
Approx.
8.5 mm
HITACHI
KPEV-S
1.25 mm
2
×
1P
Belden Inc. 9860
0.5 mm
2
(AWG20)
or more
Max.33.4
Ω
/km Polyethylene Max.
0.5 mm
Approx.
7.8 mm
HITACHI
KPEV-S
0.5 mm
2
×
1P
Belden Inc. 9207
VCTF
0.75 mm
2
(AWG18)
or more
Max.25.1
Ω
/km PVC
Max.
0.6 mm
Approx.
6.6 mm
VCTF
0.75 mm
2
×
2C
(JIS)
Cable
Section
Notes
1) Use shielded type twist cables.
2) Use only one type of the transmission cables.
2) Do not mix different types of the cables.
3) Use twist pair cables under a bad noise environment.
Twisted-pair
with shield
VCTF
3.7 Backup Battery for Clock
It is possible to backup the clock with backup battery for 1-month. In order to charge full, it is necessary
to turn on the power for 2 days. If it turns off within 2 days from first installation, it may not backup the
clock for 1-month.
Conductor
Insulator
Jacket
Shield
Jacket
Conductor
Insulator
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