Lumel N32U User Manual
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Lumel N32U User Manual

Digital panel meter
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N32U
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Summary of Contents for Lumel N32U

  • Page 1 N32U user’s manual...

  • Page 2: Table Of Contents

    N32U User's manual Contents 1 Application............................3 2 Meter set............................5 3 Basic requirements, operational safety.....................5 4 Installation............................5 4.1 Installation method........................5 4.2 External connection diagram....................7 4.3 Examples of connecting the external transducers ..............10 5 Service............................11 5.1 Description of the frontal plate....................11 5.2 Buttons' functions........................13 5.3 Programming meter parameters....................14...

  • Page 3: Application

    User's manual 1 Application The N32U meter is a digital panel meter adapted to be fixed to the panel. The N32U meters are designed to measure standard analog signals used in automation and enable the measurement of standardized voltage and current signals, the signals from RTD and thermocouple sensors.
  • Page 4 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 N32U meter is shown in Fig. 1. Fig. 1: View of the N32U meter.

  • Page 5: Meter Set

    Removal of the meter electronics during the warranty period voids the warranty. • 4 Installation 4.1 Installation method The N32U meters are designed to be mounted in a panel. Prior to installation a 92 +0.6 +0.6 mm slot must be made in the panel. The maximum thickness of the panel material cannot exceed 6 mm.
  • Page 6 N32U User's manual Fig. 2: Meter fixing. Electrical connections of the meter should be made with the wires with the cross-section up to 2.5 mm . Detachable sockets with the plugs of 5.08 mm pitch can be used for the connections.

  • Page 7: External Connection Diagram

    User's manual 4.2 External connection diagram The N32U meter has two detachable terminal strips to connect the wires of a cross-section up to 2.5 mm . 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.
  • Page 8 N32U User's manual Fig. 5: Signals on the terminal strips. 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, 2, 3, 4,...
  • Page 9 N32U User's manual 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. 20...28...

  • Page 10: Examples Of Connecting The External Transducers

    N32U User's manual Standard signals 0...10 V Standard signals 0/4...20 mA Thermocouples, thermocouple sensors (Range -13…13 V) (Range -24…24 mA). (thermocouple) Standard shunts: 60 mV, 150 mV, RTD sensors or resistor in 3-wire RTD sensors or resistor in 2-wire 300 mV system.

  • Page 11: Service

    N32U User's manual Connecting the transducer supplied by a Connecting the transducer with a voltage current loop (2-wire system 4...20 mA). output in 3-wire system. 5 Service The N32 meter user interface includes an LCD display and the buttons which enable to display the measuring value, a full configuration and setting of the meter or modification of the parameters.
  • Page 12 N32U User's manual Fig. 6: Front panel of the meter. Designation Description The upper (main) line of the display has 6 characters used to display a measuring value or a parameter value during the meter configuration. 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.

  • Page 13: Buttons' Functions

    N32U User's manual ºC m/min ºF l/min kvar pcs/h Mvar km/h kg/h varh 5.2 Buttons' functions Cancel button: Exiting the menu and exit to the main screen. • Exiting a lower level of the menu and return to a higher level.

  • Page 14: Programming Meter Parameters

    N32U User's manual Confirm button: Entering the programming mode (holding down the button for at least 3 • seconds). Navigating the menu - entering the parameter value editing mode or • entering the selected lower level of the menu. Accepting the changed parameter value.
  • Page 15 N32U User's manual MENU. After entering the group of the parameters (after pressing the confirm button), the upper line displays the value of a given setting and the lower line shows the name of the parameter which value is displayed in the upper line. Sample view of the selection of the measured input signal type is shown in Fig.

  • Page 16: How To Change Quantity Of A Selected Parameter

    N32U User's manual Minimum value on Maximum value on Resolution - position The unit which can Selection of main the display. For be displayed in the the display. For of the decimal point. displayed value. values lower than values higher than...

  • Page 17: Programmable Meter Parameters, Default Parameters

    5.3.2 Programmable meter parameters, default parameters The N32U meters have a number of programmable parameters, which enable the meter to be adapted to the requirements of application. The parameters grouped according to the menu are shown in the tables below.
  • Page 18 N32U User's manual Default: 0 The resistance of the connecting cables or -30...70 – for the input set to measure using the terminals temperature during manual thermocouples. compensation (MANUAL). 0...20 – for resistance measurement or temperature measurement using the RTD sensors.
  • Page 19 N32U User's manual Display narrowing upper threshold. If the value Default: -99999 to be displayed is above the threshold, the upper limit symbol is displayed -99999...999999 Default: 0000.00 000000 00000.0 Resolution, display format as the position of 0000.00 the decimal point.
  • Page 20 N32U User's manual Table 5 Parameter Description Range of changes symbol Default: 1 MODBUS network meter address 1...247 Default: F8N1 The transmission frame type of RS-485 F8N1 interface. Setting the parity bits and the F8N2 number of stop bits. F8O1 F8E1 Default: 9.6k...

  • Page 21: Meter Functions

    5.4.1 Measurement The N32U meters continuously measure the selected quantity, which is averaged in a given period, and convert it according to the selected mathematical function, and then convert it based on the individual characteristic. If the automatic resistance compensation...

  • Page 22: Averaging The Measuring Quantity

    N32U User's manual maximum measuring value. Exceeding set lower threshold of the measurement (the measuring value lower than the set limit value) causes to display information about exceeding the lower limit, and exceeding set upper threshold of the measuring range (measuring value greater than the set limit value) causes to display information about exceeding the upper limit.

  • Page 23: Minimum And Maximum Measuring Values

    Fig. 10: The message after resetting the maximum value. 5.4.1.3 Mathematical functions The N32U meters have a functionality that enables the conversion of the measuring value by the selected mathematical function (MAtH setting): Sqr – measured value is squared. •...
  • Page 24 N32U User's manual The individual characteristic parameters are available from the menu level and via the interface. Programming client-specific characteristic requires to define the number of points and then determining their values. Defining points of the individual characteristic requires to determine the points of the characteristic by providing the X and Y values of each point.

  • Page 25: Analog Output

    5.4.2 Analog output The N32U meters can have one analog output (depends on the ordering code) connected to the meter terminals as a voltage output (0...10 V output) and as a current output (0...20 mA or 4...20 mA). The current output is galvanically separated from the other meter circuits.

  • Page 26: Alarm Outputs

    5.4.3 Alarm outputs The N32U meters are equipped with one alarm output as standard. They can have 4 alarm outputs as an option, including three outputs with a switching contact. The alarm output element are electro-magnetic relays. If the meter is physically equipped with one alarm, 4 alarms are still available in the meter menu.

  • Page 27: Rs-485 Interface

    The terminals A, B and GNDI terminals which location is shown in Fig. 5 allow to connect the RS-485 interface to the N32U meter. It is required to connect the lines A and B in parallel with their equivalents in other devices to obtain the correct transmission.

  • Page 28: Description Of The Modbus Protocol Implementation

    Maximum response time: 50 ms. • 5.5.3 Implemented functions of MODBUS protocol The following functions of the MODBUS protocol have been implemented in the N32U meters: 03 (03h) – readout of registers group. • 04 (04h) – readout of input registers group.

  • Page 29: Map Of The Registers

    B1 B0 B3 B2. The table below shows the register map of the N32U meter. The addresses in the table are the physical addresses. The register number should be increased by 1 when using the programs where the addresses are provided in a logical format.
  • Page 30 N32U User's manual 150 mV – voltage measurement 300 mV – voltage measurement 10 V – voltage measurement 0...20 mA – current measurement 4...20 mA – current measurement Averaging - number of the samples averaged for one measurement. 4001 1...600 Sampling rate 100 ms (200 ms for the RTD sensors in 3-wire system).
  • Page 31 N32U User's manual Current time. Selection of the unit to be displayed in the lower line of the display on 4008 0...56 the main screen (see register 4006). See point 5.1. 4009 0...9999 Access protection code to make changed in the configuration using the meter menu.
  • Page 32 N32U User's manual 28800 38400 57600 115200 4017 0, 1 RS–485 – Apply entered settings. Entering the value 1 changes immediately the settings and resets the register. If the RS-485 interface parameters have been modified without applying the change, new parameters will be applied after the meter is turned on again.
  • Page 33 N32U User's manual Alarm 4 4033 0..3 Value controlling the alarm, as for the alarm no. 1. 4034 0...6 Alarm type, as for the alarm no. 1. 4035 0...900 Alarm activation delay in seconds. 4036 0...900 Alarm deactivation delay in seconds.

  • Page 34: Registers 4200 - 4233

    N32U User's manual Reset a maximum value. Reset a minimum and maximum value. Restore default settings Entering 1 restores the default settings 4055 0, 1 (default configuration) and resets this register. 5.5.4.2 Registers 4200 – 4233 Readout only 16-bit registers.

  • Page 35: Registers 7500 - 7515 And 7000 - 7031

    N32U User's manual 4227 Measurement error / terminals temperature sensor. 4228 Incorrect configuration of the individual characteristic. 4229 Loss time - not set RTC clock. 4230 Alarm 1 active. 4231 Alarm 2 active. 4232 Alarm 3 active. 4233 Alarm 4 active.
  • Page 36 N32U User's manual address for 32-bit variables was entered in the address field, while the address for accessing data stored in two successive 16-bit registers was entered in a bracket. Address Address (value (32-bit in 2 16-bit Permissible values Default...
  • Page 37 N32U User's manual 7624 7248 -99999...999999 7625 7250 -99999...999999 7626 7252 -99999...999999 7627 7254 -99999...999999 7628 7256 -99999...999999 7629 7258 -99999...999999 7630 7260 -99999...999999 7631 7262 -99999...999999 7632 7264 -99999...999999 7633 7266 -99999...999999 7634 7268 -99999...999999 7635 7270 -99999...999999 7636 7272 -99999...999999...

  • Page 38: Error Codes

    -99999...999999 6 Error codes The N32U meters have several diagnostic functions and settings built-in that allow to limit the displaying. So the display may show and the status registers may store information about the diagnosed error, event or fault. Possible messages and their potential causes are listed below.

  • Page 39: Technical Data

    N32U User's manual No communication with the analog output module. Please contact the Service Department. 7 Technical data Measuring ranges Indication range Input type Class (rated range) PT100 -200...850 ºC (-200...850 ºC) PT1000 -200...850 ºC (-200...850 ºC) 400 Ω 0...480 Ω (0...400 Ω) 4000 Ω...
  • Page 40 N32U User's manual Additional measurement errors Automatic compensation of reference junction temperature < 1 ºC Automatic compensation of wire resistance for RTD sensors < 0.5 ºC Automatic compensation for resistance measurements < 0.2 Ω (range 400 Ω) < 2 Ω (range 4000 Ω)
  • Page 41 N32U User's manual Intrinsic error 0.1% of range Error due to temperature change 50% of intrinsic error value / 10 K Auxiliary supply output Voltage source, galvanically separated 24 V ±5 %. • Maximum load capacity 24 V / 30 mA.

  • Page 42: Ordering Code

    RS-485 interface, analog output Altitude a.s.l. < 2000 m *300 V if +24 V auxiliary voltage output is not used. 8 Ordering code Panel meter N32U XXXXXXX Supply voltage 85..253 V AC, 90...300 V DC 20...40 V AC, 20...60 V DC...
  • Page 43 LUMEL S.A. ul. słubicka 4, 65-127 Zielona góra, poland tel.: +48 68 45 75 100, fax +48 68 45 75 508 www.lumel.com.pl Technical support: tel.: (+48 68) 45 75 143, 45 75 141, 45 75 144, 45 75 140 e-mail: export@lumel.com.pl Export department: tel.: (+48 68) 45 75 130, 45 75 131, 45 75 132...

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