110
• Control systems
• intelligent Touch Manager • ED721208
5. Power proportional distribution
System Architecture
Confirmation of Watthour Meter
For distribution of electric energy, the integrating watthour meter with pulse transmitter is required.
It is important to confirm that the specifications coincide with each other, and also to confirm with the division in charge (normally,
electrical work division, not air-conditioning div.).
Specifications of watthour meter to be connected to intelligent Manager
a) To be an integrating watthour meter with pulse transmitter.
b) The output pulse unit (pulse weight) is to be from 0.1 kWh/pulse to 10 kWh/pulse.
c) The pulse width is to be within 20~400 msec and pulse interval have to be more than 100 msec.
d) The semiconductor relay is to be used for pulse output, and it to be no-voltage output.
If the specifications are not coincident, there is a possibility that the following imperfections are caused:
• If the pulse width is not within 20~400 msec.
If it is less than 20 msec, the pulse input cannot be detected, and the result of calculation is smaller than the real value.
In addition, if more than 400 msec, more than 2 pulses is detected for 1-pulse input, and the result of calculation is larger than the
real value.
• If use of contact other than electronic type relay.
If it is a mechanical relay, the pulse may not accurately be detected due to relay chattering.
Confirm the following items for the construction process.
• Construction of pulse signal line is kept away from power cables
For this pulse signal line, the voltage DC16V should be applied from the intelligent Manager side. It should be constructed separating
from the power cables.
• Max. distance to be 200 m
Confirm that the distance with the watthour meter~intelligent Manager is within 200 m.
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