36
8-4 Communication Specifications
Interface
Conforming to RS-485
Protocol
MEWTOCOL/MODBUS (RTU) (different model)
Isolation status
Isolated with the internal circuit
Number of connected units
99 (max.)
※
1
※
2
Transmission distance
1200m
Transmission speed
38400/19200/9600/4800/2400bps (selectable with setting mode)
Data length
8bit/7bit (selectable with setting mode)
7bit (fixed)
(MEWTOCOL type)
(MODBUS type)
Parity
Not available/Odd number/Even number
(selectable with setting mode)
Transmission
Format
Stop bit
1bit
(
fixed
)
Communication method
Half-duplex
Synchronous system
Synchronous communication method
Ending resistance
Approx. 120
Ω(
built-in
)
※
3
◆
Factory settings
Transmission speed (Baud rate)
Data length
Parity
Stop bit
Station no.
19200 bps
8 bit
Odd number
1 bit (fixed)
1
※
1 For RS-485 converter on the computer side, we recommend SI-35 (from LINE EYE Co.,Ltd.).
※
2 When using SI-35, SI-35USB or PLC from our company (which can be connected up to 99 units), up to 99
Eco-POWER METER can be connected.
In case using this system with the other devices, up to 31 Eco-POWER METER can be connected.
※
3 Change the sliding switch of main unit as a terminal station. (Factory setting; General side)
8-5 Dedicated Current Transformer Specifications
Model No.
AKW4801
AKW4802
AKW4803
AKW4804
Primary side rated current
5A / 50A
100A
250A
400A
Rated secondary side current
1.67mA / 16.7mA
33.3mA
125mA
200mA
Winding (Turn)
3000
3000
2000
2000
Ratio error
±
2.0% F.S.
Hole Dia (mm)
φ
10
φ
16
φ
24
φ
36
Breakdown voltage (initial)
AC1000V/1min
(
Between through hole
and output lead wire
)
AC2000V/1min
(
Between through hole
and output lead wire
)
Insulation resistance (initial) Min. 100M
Ω
(at DC500V)
(
Between through hole and output lead wire
)
Functional
10
~
55Hz (1 cycle/ minute) single amplitude of 0.375mm
(1 hrs. on X, Y and Z axes)
Vibration
resistance
Destructive
10
~
55Hz (1 cycle/ minute) single amplitude of 0.15mm
(10 min. on X, Y and Z axes)
Functional Min.
98m/s
2
(4 times on X, Y and Z axes)
Shock
resistance
Destructive Min. 294m/ s
2
(5 times on X, Y and Z axes)
Output protection level
±
7.5V with clamp element
±
3.0V with clamp element
Permissible
clamping frequency
Approx. 100 times
Ambient temperature
-10 to +50
℃
(without frost and non-condensing)
Storage temperature
-20 to +60
℃
(without frost and non-condensing)
Ambient humidity
35
~
80%RH
(
at 20
℃
non-condensing
)
Weight
Approx. 50g
(Trunk cable included)
Approx. 80g
(Trunk cable included)
Approx. 200g
(without trunk cable)
Approx. 300g
(without trunk cable)
Note) Dedicated current transformers (CT), AKW4801, 4802,4803,4804, are dedicated for low
voltage under 440V. They can not be used for high voltage circuit. In case measuring
high voltage circuit, make a 2-step construction by combination of a commercial CT of
secondary side current 5A for high voltage and the dedicated CT for 5A (AKW4801).
Содержание KW4M
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Страница 44: ...38 9 2 Dedicated CT Unit mm Clearance 1 0 For 5A 50A AKW4801 For 100A AKW4802 Attached trunk cable L 1000 ...
Страница 45: ...39 For 250A AKW4803 For 400A AKW4804 ...
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