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000898AG
5 - Installation
C
onnection and configuration of the ABB B21 meter (single-phase)
The indications set out below are necessary to connect the meter to the REACT2 system.
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The energy meter ABB B21
50
is a DIN rail device (2 modules) and must be
installed where the electricity supply is single-phase.
To avoid risks of electrical shock, all wiring operations must be carried out with the AC discon-
nect switch (or the supply meter) upstream of the meter disconnected.
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meter (13mm).
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printed on the meter (L and N) to the AC connection terminal block
53
and tighten the screws (tightening torque 3.0 Nm).
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the rear of the ABB B21
50
) respecting the correspondence between
the signals of the serial line and tighten the screws (torque 0.25 Nm):
Serial line terminal block
of the meter ABB B21
54
Screw terminal on the
counterpart connector
A (37)
1 (-T/R)
B (36)
3 (+T/R)
C (35)
4 (RTN)
RS485 METER
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REACT2-UNO METER connector
14
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3
COMM
5
COMM.
To REACT J3
logic board
N
N
LOADS and REACT SIDE
L
L
TO GRID
Содержание REACT 2 Series
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