55
【
Attention
】
a. Different pulse acquisition devices have different operating modes. The pulse output
port circuit provided by PMAC735E is adopting the collecting electrode open-circuit mode,
isolated by optically coupled.
b. Electrical characteristics: For the collecting electrodes, open-circuit voltage:
4
8V≤
V
cc
≤
50V
; Current:
mA
I
z
50
.
The pulse outputs of PMAC735E correspond to the signal energy values inputted into the meter,
and they can also be called secondary side energy values. When the user calculates the actual
energy, the pulse outputs should be multiplied by the CT and PT factors. Each pulse does not
represent one kilowatt-hour or kilovar-hour, so the user needs to set a reasonable pulse constant.
The maximum setting range is between 1000 and 40000. The maximum pulse speed does not
exceed 200 ms, which means that, when the accumulated energy of the meter is 1 kwh, the
number of pulse outputs is N. Please note that the energy values here are all secondary side data.
Therefore, when there are PTs and CTs, the primary side energy corresponding to N pulses should
be 1 kwh×PT×CT .
The maximum settable scope of 220V/5A range is 1000 to 5000, those of 220V/1A and 100V/5A
ranges are both 1000 to 20000, and that of 100V/1A range is 1000 to 40000.
The step lengths are all 100.
