ABB A43 User Manual

Technical Description
A43/A44 56 2CMC48001M0201
User Manual Revision: C
5.5 Inputs and Outputs
General Inputs/outputs are built with optocouplers and are galvanically isolated from
other meter electronics. They are polarity independent and handle both DC and
AC voltage.
An input that is not connected equals having its voltage off.
Functionality
of inputs
The equivalent circuitry of the outputs is an ideal relay in series with a resistor.
The inputs count pulses, register activity and current status and the data can
be read directly on the meter display or via communication
Register activity can be reset via communication or via the buttons directly on
the meter.
Functionality of The outputs can be controlled by communication, alarm or by the internal clock.
outputs
5.5.1 Tariff Inputs
Tariff control
On meters with tariff functionality, the tariffs are controlled either via communi-
cation, the internal clock or by 1 or 2 tariff inputs.
Tariff control via inputs is done by applying a proper combination of "voltage" or
"no voltage" to the input(s). Each combination of "voltage"/"no voltage" will re-
sult in that the meter will register the energy in a particular tariff register.
In combined meters with both active and reactive metering, both quantities are
controlled by the same inputs and the active tariff for active and reactive energy
will always be the same.
Indication of
The active tariff is displayed on the LCD by the text "Tx" in the status field, where
active tariff
x is the tariff number. The active tariff can also be read via communication.
Input coding, meters with 4 tariffs
The coding of the inputs is binary. The following table describes the default
cod-ing.
Input 4
Input 3
Tariff
OFF
OFF
= T1
OFF
ON
= T2
ON
OFF
= T3
ON
ON
= T4

ABB A43 Specifications

General

Brand	ABB
Model	A43
Category	Measuring Instruments
Language	English