Specifications are subject to change without notice EM2172D DS ENG 190210 3
EM21 72D
on the instrument.
Addresses 247, selectable by means
of the front keypad
Protocol MODBUS/JBUS (RTU)
Data (bidirectional)
Dynamic (reading only) System and phase vari-
ables: see table “List of
variables...”
Static (reading and writing) All the configuration
parameters.
Data format 1 start bit, 8 data bit, no
parity,1 stop bit.
Baud-rate 9600 bits/s.
Driver input capability 1/5 unit load. Maximum
160 transceiver on the
same bus.
Insulation By means of optocouplers,
4000 VRMS output to mea-
suring input.
Pulse output
Number of outputs 1
Type Programmable from 0.01 to
9.99 kWh per pulses. Out-
put connectable to the
energy meters (kWh)
Pulse duration ≥100ms < 120ms (ON),
≥120ms (OFF), according
to EN62052-31.
Output Static: opto-mosfet.
Load VON 2.5 VAC/DC max. 70 mA,
VOFF 260 VAC/DC max.
Insulation By means of optocouplers,
4000 VRMS output to mea-
suring inputs.
RS485
Type Multidrop, bidirectional
(static and dynamic vari-
ables)
Connections 2-wire. Max. distance
1000m, termination directly
Output specifications
Transformer ratio
VT (PT) 1.0 to 99.9 / 100 to 999 /
1.00k to 6.00k
CT 1.0 to 99.9 / 100 to 999 /
1.00k to 9.99k / 10.0k to
60.0k.
The maximum power being
measured cannot exceed
210 MW calculated as
maximum input voltage
and current, (see the
“Accuracy” paragraph).
The maximum VT by CT
ratio is 48.600. For MID
complaint applications the
maximum power being
measured is 25 MW.
Displaying Up to 3 variables per page.
See « Display pages » , 3
different set of variables
available (see « Display
pages ») according to the
metering function being
selected.
Reset By means of the front key-
pad: total energies (kWh,
kvarh).
Easy connection function Wrong phase detection
and displaying. For all the
display selections, both
energy measurements are
dependent from the current
direction, both power mea-
surements are independent
from the current direction.
The power measurements
are always positive.
Password Numeric code of max. 3
digits;
2protection levels of the
programming data:
1st level Password “0”, no protec-
tion;
2nd level Passwordfrom 1 to 999, all
data are protected
Programming lock By means of potentiometer
(back-side of the display
module) it is possible to
lock the access to all the
configuration parameters.
System selection
System 3-Ph.n unbalanced load 3-phase (4-wire)
3-phase (3-wire)
System 3-Ph.1 balanced load •3-phase (3-wire) one cur-
rent and 3-phase to phase
voltage measurements.
Note: the phase to phase
voltage is calculated multi-
plying by 1.73 the virtual
phase to neutral voltage.
•3-phase (4-wire) one cur-
rent and 3-phase to neutral
voltage measurements.
Note: the phase to phase
voltage is calculated multi-
plying by 1.73 the virtual
phase to neutral voltage.
•3-phase (2-wire) one cur-
rent and 1-phase (L1) to
neutral voltage measure-
ment.
System 2-Ph 2-phase (3-wire)
System 1-Ph 1-phase (2-wire)
Softwarefunctions