Lumel N32H User manual

N32H--09 1 User's manual
DIGITAL PANEL METER
N32H
SERVICE MANUAL

N32H--09 2 User's manual
Contents
1 Application.......................................................................................................................................3
2 Meter set...........................................................................................................................................5
3 Basic requirements, operational safety.............................................................................................5
4 Installation........................................................................................................................................6
4.1 Installation method...................................................................................................................6
4.2 xternal connection diagram....................................................................................................7
5 Service............................................................................................................................................10
5.1 Description of the frontal plate...............................................................................................10
5.2 Buttons' functions...................................................................................................................12
5.3 Programming meter parameters..............................................................................................13
5.3.1 How to change quantity of a selected parameter............................................................15
5.3.2 Programmable meter parameters, default parameters.....................................................15
5.4 Meter functions.......................................................................................................................20
5.4.1 Measurement...................................................................................................................20
5.4.1.1 Averaging the measuring quantities.........................................................................21
5.4.1.2 Minimum and maximum measuring values............................................................22
5.4.1.3 Voltage measurement compensation.......................................................................23
5.4.2 Analog output..................................................................................................................23
5.4.3 Alarm outputs..................................................................................................................24
5.4.4 Binary output...................................................................................................................25
5.5 RS-485 interface.....................................................................................................................26
5.5.1 Connection......................................................................................................................26
5.5.2 Description of the MODBUS protocol implementation.................................................27
5.5.3 Implemented functions of MODBUS protocol...............................................................28
5.5.4 Map of the registers.........................................................................................................28
5.5.4.1 Registers 4000 – 4054.............................................................................................28
5.5.4.2 Registers 4200 – 4233.............................................................................................33
5.5.4.3 Registers 7500 – 7515 and 7000 – 7031.................................................................35
5.5.4.4 Registers 7600 – 7677 and 7200 – 7355.................................................................36
6 rror codes......................................................................................................................................37
7 Technical data.................................................................................................................................38
8 Ordering code.................................................................................................................................41

N32H--09 3 User's manual
1 Application
The N32H meter is a digital panel meter adapted to be fixed to the panel. The N32H
meters are designed to measure voltages, currents, power, energy and capacity in D
circuits. urrent measurement is carried out using an external current shunt, which
enables easy adjustment of the current measuring range to the requirements of the
application.
Additionally, the meter supports the programmable alarms with the delay activation and
deactivation function as well as a memory of the alarm event. The functionality of the
meter is complemented by a programmable analog output - RS-485 interface.
The user interface consists four buttons and the high contrast L D display with backlight.
Thanks to the two-line display, it is possible to set the selected unit, display simultaneously
the measuring value and the current time, as well as a clear and user friendly menu with
simultaneously visible the parameter name and its value.
Features of the N32 meter:
•Wide range of measured voltages.
•Wide range of voltage measurement on the shunt input with automatic selection of
the measuring range based on the rated current and rated voltage of the shunt
used.
•High sampling frequency of the measuring signals.
•Wide measuring ranges including high peak of the current values and large values
of exceeding the measuring range.
•Automatic calculation of the current based on the voltage measurement on the
shunt.
•Automatic reset of the energy counter and the capacity counter (accumulated
current) after a power decay - a function supporting the measurement of battery
charging parameters.
•The function of automatic compensation of the voltage drop on the measuring shunt
which helps to correctly measure a voltage, power and energy in relation to the
load.
•High contrast L D display with built-in backlight.
•Two-line display.
•Automatic selection of the unit of the measured (displayed) value.
•Measuring value preview mode.

N32H--09 4 User's manual
•Possibility to simultaneously display two selected measured quantities or for
example, a measured quantity and a unit or time.
•Programmable display precision with the function of automatic setting of the
decimal point and the multiplier (kilo, mega) displayed with the unit.
•Possibility to program the measuring range (narrowing) for the selected displayed
value.
•Additional measurement of minimum and maximum values during the moving
window, with the possibility of programming one of these values to be displayed as
the main one.
•Selection of the period and averaging method with the possibility of synchronizing
the average value with the built-in real-time clock.
•Programmable alarms with the functions of programmable delays of alarm
activation and deactivation, triggered by a specific controlling value. Up to 4 relays,
including up to 3 relays with a switching contact. Possibility to configure each of the
alarms to work in a selected mode and to react to any measuring quantity including
the current time.
•Possibility to control the alarm outputs (relay) via the RS-485 interface.
•Programmable standard analog outputs enabling the retransmission of a selected
measuring quantity or a selected parameter. Freely programmable output type and
conversion range.
•Built-in by default RS-485 interface with MODBUS RTU protocol support.
•Built-in real-time clock with a built-in automatic change of DST and inversely. The
clock can be a parameter which controls the alarms and the value of the analog
output signal.
•Possibility to password protect the settings against unauthorized modification.
•Monitoring of set parameters.
•Programmed averaging time - averaging algorithm in a specified time using
standard averaging (determining the number of measurements to be averaged) and
averaging based on the moving window algorithm with a given averaging time.
•Signaling of alarm operation by highlighting the number of the active alarm.
•Registration of minimum and maximum measuring values.
•Galvanic separation between the connectors: alarm, measurement, analog outputs
auxiliary power outputs, RS-485 interface and power input.
•Protection degree from the front IP65.

N32H--09 5 User's manual
•Meter overall dimensions 96 x 48 x 100 (with the terminals).
•The casing is made of a self-extinguishing plastics.
•Wide range of supply voltages.
The view of the N32H meter is shown in Fig. 1.
2 Meter set
The meter set includes:
•Meter N32H – 1 pc
•User's manual – 1 pc
•lamps to fix in the panel – 4 pcs
•Seal – 1 pc
3 Basic requirements, operational safety
In terms of a user safety, the N32H meter meets the requirements of the EN61010-1
standard for the devices intended for use in facilities compliant with the third category of
installations.
Comments concerning safety
•Assembly and installation of the electrical connections should conducted only by a
person authorised and certificated to perform assembly of electric devices .
•Always check the connections before turning the meter on.
•The meter is designed to installation and usage in the industrial electromagnetic
environment.
Fig. 1: View of t e N32H meter.

N32H--09 6 User's manual
•A switch or a circuit-breaker should be installed in the building or facility. The switch
should be located near the device, easily accessible by the operator and suitably
marked.
•Removal of the meter electronics during the warranty period voids the warranty.
4 Installation
4.1 Installation method
The N32H meters are designed to be mounted in a panel. Prior to installation a 92 +0.6 x
45+0.6 mm slot must be made in the panel. The maximum thickness of the panel material
cannot exceed 6 mm. The meter should be mounted from the front of the panel with
disconnected meter connection strips.
Before inserting the meter into the panel check the correct position of the meter seal and
make sure that the edges of the panel are not sharp what could damage the seal. After
inserting the meter into the slot, mount it with the mounting brackets provided in the meter
set (Fig. 2).
Electrical connections of the meter should be made with the wires with the cross-section
up to 2.5 mm2. Detachable sockets with the plugs of 5.08 mm pitch can be used for the
connections.
The external dimensions of the meter are shown in Fig. 3.
Fig. 2: Meter fixing.

N32H--09 7 User's manual
4.2 E ternal connection diagram
The N32H meter has two detachable terminal strips to connect the wires of a cross-section
up to 2.5 mm2. The view of the meter from the connectors' side is shown in Fig. 5. The
upper terminal strip is optional and depends on the accessories of the meter.
The circuits of successive groups of the terminals are separated from each other, as
shown in Fig. 4.
Fig. 3: Meter overall dimensions.

N32H--09 8 User's manual
Note: Unused terminals of the terminal strips (NC) must not be connected to any signals.
Detailed description of the signals is shown in the table below, and the connection of the
measuring signals is shown in Fig. 6.
Terminal Function Description
1, 4, 5 Measuring inputs Measuring inputs for connecting the measured voltage
and a shunt for current measurement. Examples of the
connections are shown in Fig. 6.
9, 10, 11 RS-485 RS-485 interface signals
12, 13 Alarm 1 Alarm output 1, which is NO relay contact.
15, 16 Power supply Meter power supply connection. Range of supply voltages
supported by the meter depends on the ordering code. It
Fig. 5: Signals on t e terminal strips.

N32H--09 9 User's manual
is required to check if the rated range of the meter
corresponds to the installation to which the meter will be
connected before installing the meter.
20...28 Alarms 2, 3, 4
(optional)
The alarm outputs 2, 3 and 4 use a relay with a switching
contact.
30...34 Analog output Analog output. The output must be properly connected
according to the type of output selected in the
configuration (voltage or current): the terminals 30 and 31
for the current output or the terminals 32 and 33 for the
voltage output. It is not possible to use the voltage and
current outputs at the same time - the correct value in
accordance with the configuration, will be available only
for the selected output type.
35, 36 Binary output Open collector binary output. Energy counter pulse
output.
8, 14, 29 N Unused terminals. Should be left unconnected.
The connection of the basic measured signals is shown below. The N32H meter can also
be used to measure only voltage or only current.
Fig. 6: Connection of t e N32H meter,

N32H--09 10 User's manual
Symbols shown in the diagram:
N32H meter:
●U - voltage measurement terminal. The voltage is measured between the U-
terminals.
●I - voltage measurement input from the shunt - indirect current measurement
method.
● - common terminal, a ground of the measuring system.
Other elements in the diagram:
●Ro - load, energy consumer.
●Rs - shunt or measuring resistor.
NOTE: The terminals I and should be connected directly to the voltage measurement
terminals on the shunt so that the resistance of the circuit leads does not cause an error in
the current measurement. The resistance of the circuit leads can be much bigger than a
shunt resistance!
5 Service
The N32 meter user interface includes an L D display and the buttons which enable to
display the measuring value, a full configuration and setting of the meter or modification of
the parameters.
After turning the meter on the display shows the name of the meter and the software
version. If there is no error during meter initialization process, the meter will switch to
displaying the measuring value. If during the initialization any irregularities or deviations
are detected, than a message with information about a detected error will be displayed
(see point 6 - Error codes).
5.1 Description of the frontal plate
View of the front panel of the meter is shown in Fig. 6. The L D display with backlight and
4 buttons are on the front panel. The description of the display fields is shown below. The
button functions are shown in the section 5.2.