KW1M-H Eco-POWER METER
10
3.5 For Output connection
・
Since the transistor output is insulated from the internal circuit by a photo-coupler, it can be used both
as a plus common and minus common.
・
Wire up to 100m for output connection.
If it is long, it may not work correctly due to floating capacitance of wire.
3.6 RS485 Communication
・
When using shielded cable for the RS485 transmission line, ground one end.
Use a class D dedicated earth for grounding. Do not share a ground with other earth lines. (Fig.1)
・
Be sure to connect with daisy chain the RS485 transmission line between each unit.
Do not use a splitter. (Fig.2)
・
With a terminal station, RS485 (E) (No.10) and RS485 (-) (No.9) should be shorted.
*E terminal is not SG (signal ground) terminal. Do not ground shielded cable.
(Fig.1)
(Fig.2)
Power supply for Load
-
+
Plus common
Eco-POWER METER
Pulse (
－
)
Pulse (+)
Minus common
11
-
+
Eco-POWER METER
Power supply for Load
12
Pulse (
－
)
Pulse (+)
11
12
Load
Load
Correct wiring
○
Incorrect wiring
×
Terminal Terminal
station station
