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8. Connection of the energy meter (continuation)
Connection of the REACT-MTR-1PH (single-phase):
The energy meter REACT-MTR-1PH
• Ensure that the AC line has been correctly disconnected upstream from the REACT-MTR-1PH. Check that there is no voltage by using a multimeter.
• Strip 8/10mm of sheathing from the connection cables of the AC power supply and connect the phase (L) and neu-
tral (N) on the specific terminal block
minal block takes a cable with a maximum section from 0.5 to 4mm² (tightening torque of 0.5Nm).
• Connect the cables of the serial line (+T, -T and RTN) on the terminal block
spondence between the signals of the serial line.
Serial line terminal block of the REACT-MTR-1PH
Each individual terminal of the terminal block takes a cable with a section from 0.14 to 1.5mm² (tightening torque of 0.5Nm).
• Subsequently the other side of the cable must be connected to the REACT2-UNO METER connector
• Install the device on the DIN rail and ensure to trigger the fixing system on it
• Disconnect the phase cable (L) of the electric supply
• Insert the phase cable (L) through the hole (Ø8mm) on the REACT-MTR-1PH
corresponding to the hole for the feeding of the line cable
which must be complied with for correct measurement of the current; in fact the direction of
the arrow indicates the supply point of the electric energy (as indicated in the diagram).
• Once the connection stage is finished, the correct installation of the REACT-MTR-1PH must be verified:
- Power the REACT-MTR-1PH while keeping the REACT2 system off
- Action a load (of at least 50W) in the house so that the REACT-MTR-1PH records drawing of current
from the grid
- Check that the LED MEASURE (red) is permanently on. This condition in-
dicates that a drawing from the grid is recorded and so that the reading
of the direction of the current by the REACT-MTR-1PH is correct.
Connection and configuration of the ABB B21 meter (single-phase):
The energy meter ABB B21
• Disconnect the AC disconnect switch upstream of the meter.
• Strip the insulation of the cable for the length which is indicated on the meter (13mm).
• Connect the cables of the single-phase line in accordance with the layout printed on the meter (L and N)
to the AC connection terminal block
• Connect the cables of the serial line A (37), B (36) and C (37) (set on the rear of the ABB B21
signals of the serial line and tighten the screws (torque 0.25 Nm):
Serial line terminal block of the meter ABB B21
• Subsequently the other side of the cable must be connected to the REACT2-UNO METER connector
• Install the mater on the DIN rail and ensure to trigger the fixing system on it
• Once the phase of mechanical installation of the METER is finished, it is necessary to configure the METER in order to make it compatible with
the REACT2 system. Set the parameters of the meter as set out in the table:
The settings are made by using the keypad and the display on the meter:
1. Press for two seconds
2. Press repeatedly
until the display shows "Set".
- Press
to confirm.
3. Press repeatedly
until the display shows "RS-485".
- Press
to confirm.
4. Press repeatedly
until the display shows "Protocol".
- Press
to access.
- Press
to enable the change in the value.
- Press repeatedly
until the display shows "Modbus".
- Press
to confirm the change.
- Press for two seconds
5. Press repeatedly
until the display shows "Baud rate".
- Press
to access.
- Press
to enable the change in the value.
- Press repeatedly
and select 19200.
- Press
to confirm the change.
- Press for two seconds
51
is a DIN rail device (3 modules) and must be installed where the electricity supply is single-phase
53
set on the upper side of the meter; each individual terminal of the ter-
54
-T
+T
RTN
50
is a DIN rail device (2 modules) and must be installed where the electricity supply is single-phase.
53
and tighten the screws (tightening torque 3.0 Nm).
54
A (37)
B (36)
C (35)
Parameter
Address
Protocol
Baudrate
Parity
to access the setup menu of the meter.
to return to the RS485 menu.
to return to the RS485 menu.
54
(on the lower part of the REACT-MTR-1PH) respecting the corre-
Screw terminal on the counterpart connector
51
. The arrow
52
, indicates the direction of insertion
Screw terminal on the counterpart connector
6. Press repeatedly
- Press
to access.
- Press
to enable the change in the value.
- Press repeatedly
- Press
to confirm the change.
- Press for two seconds
7. Press repeatedly
- Press
to access.
- Press
to enable the change in the value.
- Press repeatedly
- Press
to confirm the change.
- 11 -
1 (-T/R)
3 (+T/R)
4 (RTN)
14
INPUT :
110/230 V
50/60 Hz
10 mA max
50
) respecting the correspondence between the
1 (-T/R)
3 (+T/R)
4 (RTN)
14
Settings
1
MODBUS
19200
EVEN
until the display shows "Address".
and select 1.
to return to the RS485 menu.
until the display shows "Modbus".
and select even.
EN
REACT-MTR-1PH
(Continue to next page)
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