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Description of Unit
Series designation
Firmware version
Class 0.2
1.4
Block Schematic Diagram
D000030110 d – E650 Series 3 (ZMD400AT/CT, ZFD400AT/CT) – User Manual
The hardware version is defined with a series designation. The first hard-
ware generation (Series 1) does not have a series designation.
The type designation on the nameplate ends with the series designation S2
for the 2nd hardware generation (Series 2). An attached suffix points out
that the meter is equipped with certain non-standard features, e.g. S2s
represents a Series 2 meter with symmetrical terminal layout.
S3 represents the newest hardware generation.
The meter's firmware version, which determines certain meter characteris-
tics, can be displayed on the LCD e.g. as part of the rolling display (depen-
ding on parameterisation) and can be read out in the following two ways:
meter data readout (depending on parameterisation)
meter identification readout (see section 5.7 "Data Readout")
Some executions of ZMD400CT/CR meters are available with accuracy
class 0.2S. These meters fulfill the IEC accuracy class 0.2S for active ener-
gy and class 0.5 for reactive energy. For details see the corresponding
datasheet.
This chapter provides an overview of the function of ZxD400xT meters
based on a block schematic diagram.
Fig. 1.1
Block schematic diagram ZMD400xT
The ZxD400AT active energy meters record the imported and exported
active energy consumption, while the ZxD400CT combimeters record the
active and reactive energy consumption in all four quadrants.
The ZxD400xT meters can be fitted with modular communication interfaces
in a communication unit, which can be exchanged or used in the field as
required.
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© Landis+Gyr AG
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