Block Schematic Diagram - Landis+Gyr ZMQ202 User Manual

2.2

Block Schematic Diagram

Inputs
Landis+Gyr
14/88
Broad range of applications:
Wall / projection-mounting and rack / flush-mounting with the same
printed circuit boards give more flexibility at the place of installation and
saves money on spare parts. Plug-in compatible version for replacing or
extending with ESSAILEC connectors.
E1
E2
E3
Syn
I1
A/D
Filter
I2
I3
U1
U2
A/D Filter
U3
N
Measuring system
U
S
U
S
The main inputs to the meter are:
• Phase voltages U1, U2, U3 and neutral conductor N
to be processed in the measuring system
-
for the three-phase power supply of the meter
-
to be monitored by the voltage monitor
-
• Phase currents I1, I2, I3
to be processed in the measuring system
-
to be monitored by the current monitor
-
• Control inputs used for:
selecting of energy tariffs (3 control inputs: E1, E2, E3)
-
synchronising the internal calendar clock (1 control input: Syn)
-
Microprocessor
Alarm reset
Calendar clock
Time switch
Tariff
control
Control
inputs
Measured
quantities
Signal
processing
Calibration
Power supply
Supply monitor
Additional
power supply
Flash
memory
Standard Optional
functions
functions
H 71 0200 0215 f en - ZMQ202 / ZFQ202 - User Manual
Display buttons
LCD display
Optical
Billing
interface
data
Local
Load
RS485 interface
profil
data
Communication
unit with
interfaces
Transmitting
contacts
board
4 change-
over or
8 normally
open
contacts
Optical test
output
Alarm
output
Control Digital
signals data
Description of Unit