Measuring Principle; Overview - Landis+Gyr E450 User Manual

Description of Unit
1.5

Measuring Principle

1.5.1

Overview

Inputs
Outputs
D000029326 en g – E450 PLC 1-phase ZCX100Px – User Manual
Fig. 1.2 Block diagram
The main meter inputs are:
•
Phase connection and neutral for
energy measurement
-
power supply to the meter
-
PLC communication with communication module
-
•
Display key
•
Reset key
•
Disconnector push button
•
S0 pulse input
•
Wired M-Bus interface supporting 1 multi-energy devices
The main meter outputs (some of which are also inputs) are:
•
LCD to display measured values and the corresponding OBIS code
•
Optical test output (red, for active and reactive energy)
•
Mechanical on-off latching relay 5 A, 230 VAC or digital solid state
relay 90 mA, 230 VAC (inverse function supported)
•
Mechanical, normal open relay 8 A, 230 VAC (inverse function supported)
•
Optical interface for automatic data readout on site by means of a suit-
able HHT (Hand Held Terminal) (also input)
•
PLAN+ PLC communication interface for connection to a metering
system via the low voltage network (also input)
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