Lumel N32P User manual

N32P-09 User's manual 1
DIGITAL PANEL METER
N32P
SERVICE MANUAL

N32P-09 User's manual 2
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.....................................................16
5.4 Meter functions.......................................................................................................................22
5.4.1 Measurement...................................................................................................................22
5.4.1.1 Averaging the measuring quantities.........................................................................23
5.4.1.2 Minimum and maximum measuring values............................................................24
5.4.2 Analog output..................................................................................................................25
5.4.3 Alarm outputs..................................................................................................................26
5.4.4 Binary output...................................................................................................................27
5.5 RS-485 interface.....................................................................................................................28
5.5.1 Connection......................................................................................................................28
5.5.2 Description of the MODBUS protocol implementation.................................................29
5.5.3 Implemented functions of MODBUS protocol...............................................................29
5.5.4 Map of the registers.........................................................................................................30
5.5.4.1 Registers 3000 – 3127.............................................................................................30
5.5.4.2 Registers 4000 – 4054.............................................................................................31
5.5.4.3 Registers 4200 – 4261.............................................................................................36
5.5.4.4 Registers 7500 – 7559 and 7000 – 7119.................................................................38
5.5.4.5 Registers 7600 – 7677 and 7200 – 7355.................................................................40
6 rror codes......................................................................................................................................41
7 Technical data.................................................................................................................................42
8 Ordering code.................................................................................................................................45

N32P-09 User's manual 3
1 Application
The N32P meter is a digital panel meter adapted to be fixed to the panel. The N32P
meters are designed to measure voltage, current, power and energy in A circuits. Voltage
and current measurement can be dome directly or using an external current and voltage
transformers. The parameters of the transformers used can be configured in the N32P
meter, so the indicated measuring values will correspond to the actual measuring values
on the primary of the transformers. The N32P meters also enable to measure only a single
parameter, e.g. only current, where the meter operation is synchronized with the current
signal waveform.
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 N32P meter:
•Wide range of measured voltages.
•Programmable current range of 1 A or 5 A.
•Possibility to synchronize the zero crossing detector with the current signal.
•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.
•Programmable parameters of external current and voltage transformers.
•Galvanic separation between the voltage measurement and the current
measurement circuits.
•Measurement of voltage and current harmonics.
•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.
•Possibility to simultaneously display two selected measuring quantities or a
measuring quantity and e.g. a unit or time.

N32P-09 User's manual 4
•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 of the connections: alarm, measurement, analog outputs,
auxiliary supply outputs, RS-485 interface and supplying input.
•Protection degree from the front IP65.
•Meter overall dimensions 96 x 48 x 100 (with the terminals).

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•The casing is made of a self-extinguishing plastics.
•Wide range of supply voltages.
The view of the N32P meter is shown in Fig. 1.
2 Meter set
The meter set includes:
•Meter N32P – 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 N32P 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.
•A switch or a circuit-breaker should be installed in the building or facility. The switch
Fig. 1: View of the N32P meter.

N32P-09 User's manual 6
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 N32P 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.
Fig. 2: Meter fi ing.

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The external dimensions of the meter are shown in Fig. 3.
4.2 E ternal connection diagram
The N32P meter has three 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.
Note: Unused terminals of the terminal strips (NC) must not be connected to any signals.
Fig. 3: Meter overall dimensions.
Fig. 4: Galvanic isolation of the N32P meter.

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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
2, 4, 5, 6 Measuring inputs The measuring inputs for connecting the measuring
voltage and current or for connecting the external
transformers. 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
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.
Fig. 5: Signals on the terminal strips.

N32P-09 User's manual 9
20…28 Alarms 2, 3, 4
(optional)
The alarm outputs 2, 3 and 4 use a relay with a switching
contact.
30...33 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.
34, 35 Binary output Open collector binary output. Pulse output of the imported
or exported energy counter.
3, 7, 14,
29
N Unused terminals. Should be left unconnected.
The connection of the basic measured signals is shown below. The N32P meter can also
be used to measure only voltage or only current.
Fig. 6: Connection of the N32P meter,

N32P-09 User's manual 10
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.
Designation Description
L1 The upper (main) line of the display has 6 characters used to display a
measuring value or a parameter value during the meter configuration.
L2 The lower (auxiliary) line of the display has 5 characters used to display a
measuring value, not converted by the individual characteristic or,
according to configuration, a unit or current time.
k The kilo symbol means that the displayed value is divided by a thousand,
e.g. when the setting is displayed, the illuminated symbol means that the
given value is a thousand times greater. For example, 1.2 kA means 1200
A.
Z1 Measuring value averaging indicator. Illuminated averaging indicator
informs that the set measuring value averaging period has not elapsed yet.
M The mega symbol means that the displayed value is divided by a million,
e.g. when the setting is displayed, the illuminated symbol means that the
given value is a million times greater. For example, 3.5 MW means
Fig. 7: Front panel of the meter.