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5. Communication
This meter is defaulted to be equipped with one RS485 communication interface
with Modbus-RTU protocol. User can add one communication interface via
connecting extended module to the meter.
As for detailed information, please refer to the communication manual.
6. Extended function
6.1 Energy pulse output
The meter provides one energy pulse output which can be selected as active or
reactive energy pulse via setting so as to realize verification and remote
transmission of energy data. With energy pulse of open circuit optocoupler, the
energy accumulation metering can be realzied by collecting energy pulse from
the meter from the remote computer terminal, PLC and DI switch collection
module. The output mode of the meter adopts energy accuracy inspection mode
(National Meteorological Regulation: The Comparative Method for Pulse Error of
the Standard Meter).
Picture 5-3 Energy pulse output
A
．
Electrical features
：
VCC≤35V, Iz≤10mA;
B. Pulse constant
：
5000 imp/kWh (380V/5A range), 20000 imp/kWh
（
380V/1A,
100V/5A range
）
, 80000 imp/kWh
（
100V/1A range
）
. The meaning is when the
meter accumulates 1kWh, the number of output pulse is 5000. It must be
emphasized that 1kWh is secondary side energy data. If the meter is connected
Summary of Contents for Sfere720A
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