novus N1500 Universal Process Indicator Instruction Manual

novus N1500 Universal Process Indicator Instruction Manual

SAFETY SUMMARY

The symbols below are used on the equipment and throughout this document to draw the user’s attention to important operational and safety information.

CAUTION: Read complete instructions prior to installation and operation of the unit.

CAUTION OR WARNING: Electrical shock hazard.

All safety related instructions that appear in the manual must be observed to ensure personal safety and to prevent damage to either the instrument or the system. If the instrument is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.

PRESENTATION

N1500 is a universal process indicator which accepts a large variety of input signals and sensors. A six-digit LED display shows measured value and all programming parameters.

Instrument configuration is achieved from the keypad, without any hardware change. Thus, the selection of input type and alarms modes, besides other special functions, are accessed and defined from the frontal keypad.

The user should read this manual thoroughly before using the instrument. It must be handled with care and should be used accordingly for best results.

Some of the features are:

• Universal input: Pt100, thermocouples, 0-50 mV, 0-5 V, 0-10 V, 0- 20 mA and 4-20 mA;
• Customized indications;
• 24 Vdc power supply for remote transmitter excitation;
• Memory for maximum and minimum values;
• Hold and Peak Hold functions;
• Digital input;
• Increasing or decreasing display;
• Process Variable (PV) retransmission in 0-20 mA or 4-20 mA optional);
• RS485 MODBUS RTU serial communication (optional);
• 3rd and 4th alarm relays (optional).

PROCESS VARIABLE INPUT – PV

The process variable (PV) input type is configured through the frontal keypad according to the codes shown in Table 1 (refer to INPUT TYPE parameter (in.typ) in CONFIGURATION LEVEL).

All input types are factory calibrated and no additional calibration is required. The user does not need to make any adjustments.

indication.
0 – 5 V Linear| 0-5| Linear. Programmable indication.
0-10 V Linear| 0-10| Linear. Programmable indication.
0 – 50 mV No Linear| c.0-50| Custom linearization, user configurable.
0 – 5 V No Linear| c.0-5| Custom linearization, user configurable.
0-10 V No Linear| c.0-10| Custom linearization, user configurable.
4-20 mA NO LINEAR| L i n J| T/C type J linearization. Range: -130 to 940 °C
L i n h| T/C type K linearization. Range: -200 to 1370 °C
L i n E| T/C type T linearization. Range: -200 to 400 °C
L i n E| T/C type E linearization. Range: -100 to 720 °C
Lin m| T/C type N linearization. Range: -200 to 1300 °C
L i n r| T/C type R linearization. Range: 0 to 1760 °C
L i n S| T/C type S linearization. Range: 0 to 1760 °C
L i n b| T/C type B linearization. Range: 500 to 1800 °C
L i npIE| Pt100 linearization. Range:-200.0 to 850.0 °C
0-20 mA Linear| 0-20A| Linear. Programmable indication.
4-20 mA Linear| 4-20A| Linear. Programmable indication.
0-20 mA No Linear| c.4-20| Custom Linearization, user configurable.
4-20 mA No Linear| c.4-20| Custom Linearization, user configurable.

Table 1 – Input types accepted by the indicatordc

ALARMS

The indicator has 2 alarm outputs in the basic version and up to 4 alarms outputs optionally.

Each alarm has a corresponding LED message in the front panel to show alarm status.

ALARM FUNCTIONS

The alarms can be set to operate in seven different modes. These modes are shown in Table 2 and described below. The alarm can also be set as ‘disabled’.

• Break alarm – Err
  The break alarm is triggered whenever the input sensor breaks or is badly connected.

• Low alarm – Lo
  The alarm relay is triggered whenever the measured value is below the alarm set point.

• High alarm – Hi
  The alarm relay is triggered whenever the measured value is above the alarm set point.

• Differential low – dif.Lo
  Deviation alarm. Alarm relay is triggered whenever the difference (deviation) between the Process Variable and the reference value (AlrEF) is lower than the values defined in SP.AL. For this function, the triggering point is defined as: ( ALrEF – SP.AL )

• Differential High – dif.Hi
  Deviation alarm. Alarm relay is triggered when the difference (deviation) between the Process Variable value and the reference value (AlrEF) is greater than the value defined in SPAL. For this function, the triggering point is defined as: ( ALrEF + SP.AL )

• Differential (or Band) out of range – dif.ou
  Deviation alarm. Alarm relay is triggered when the difference (deviation) between the Process Variable value and the reference value (AlrEF) has its modulus greater than the value configured in SPAL. For this function, the triggering point is defined as: ( ALrEF – SP.AL ) and ( ALrEF + SP.AL )

• Differential (or Band) within range – dif.In
  Deviation alarm. Alarm relay is triggered when the difference (deviation) between the Process Variable value and the reference value ( AlrEF ) has its modulus lower than the value defined in SPAL. For this function, the triggering points are defined as:( ALrEF – SP.AL ) and ( _ **ALrEF

• SP.AL**_ )

TYPE

| PROMPT|

ACTION

---|---|---
Disabled|

oFF

| Alarm is inactive
Break Alarm ( i nput

Err or)

|

IErr

| Alarm will go ON if sensor breaks
Low Alarm ( Lo w)|

Lo

|
High Alarm ( Hi gh)| Hi|
Differential Low ( diff erential Lo w)|

d iF.Lo

|
Differential High ( diff erential Hi gh)| d iF.Hi|
Differential out of range ( dif ferential out)|

d iF.ou

|

Differential within range ( diff erential With in)|

d iF.In

|

Table 2 – Alarm functions

ALARM TIMER

The alarms can be configured to perform timing functions. The configuration allows the alarm output to be delayed, or to deliver a single pulse or a train of pulses. The delay, the pulse width and the period are defined by the user.

Table 3 shows these advanced functions. Times T1 and T2 can be programmed from 0 to 6500 seconds and are define during indicator configuration (see ALARM LEVEL section). Programming 0 (zero) in the timer parameters T1 and T2 disables the timer function.

The leds associated with the alarm always light up when the alarm condition occurs, regardless of the current state of the output relay, which may be de- energized momentarily due to a time delay.

ADVANCED FUNCTION

| T1| T2|

ACTION

---|---|---|---

Normal Operation

|

0

|

0

|
Delayed|

0

|

1 s to 6500 s

|

Pulse

| 1 s to 6500 s| 0|
Oscillator| 1 s to 6500 s| 1 s to 6500 s|

Table 3 – Timer alarm functions

ALARM INITIAL BLOCKING

The Initial Blocking option inhibits the alarm from being recognized if an alarm condition is present when the controller is first energized. The alarm will be triggered only after the occurrence of a non alarm condition followed by a new occurrence for the alarm.

The Initial Blocking is disabled for the Break Alarm alarm function.

SPECIAL FUNCTIONS

MAXIMUM AND MINIMUM

The indicator memorizes the measured maximum and minimum values (peak and valley). These two values are shown when pressing the MAX or MIN keys. Pressing both keys simultaneously will clear the memory for a new peak and valley detection.

SPECIAL FUNCTION KEY AND DIGITAL INPUT

The key (special function key) in the frontal panel and the optional digital input can execute special functions according to the user selection. Fig. 8 shows how to activate the digital input. The special functions for the key and for the digital input are explained as it follows.

• HoLd – Freeze measured value
  The Hold function freezes the measured value showed in the display. This function is toggled each time the key is pressed or the digital input is selected.
  Whenever the indicator is in the Hold mode a “HoLd” message is briefly displayed to show the operator that the displayed value is the frozen value and not the current input reading.

• PHoLd – Maximum value
  The Peak Hold function shows the maximum value measured since the last time the key was pressed or the digital input activated. Each activation of the key or digital input triggers a new Peak Hold level and the display resets with a new peak value.

• rSt – Clears maximum and minimum
  This function works the same way as the MAX and MIN keys pressed simultaneously, as explained in the MAXIMUM AND MINIMUM section. If this “rSt” function is programmed, every touch of the key or activation of the digital input will clear the memory and a new level of maximum and minimum values memorization will start.

PROCESS VARIABLE RETRANSMISSION

As an option, the indicator can be supplied with an isolated 0-20 mA or 4-20 mA analog output for Process Variable (PV) retransmission. Available at the back panel terminals 29 and 30. When this option is available, retransmission will be always active, so that the user will not be required to turn it on or off.

The PV values that define the scale of the 0 mA / 4 mA to 20 mA retransmission can be programmed by the user in the high and low output limits (0u.LoL and 0u.HiL), at configuration level. High and low limits can be freely programmed, even with a low limit higher than high limit, resulting in a reversed retransmission signal (decreasing signal when PV increases).

For a voltage output signal, an external shunt (calibrated resistor) should be installed at the analog output terminals.

AUXILIARY 24 VDC POWER SUPPLY – AUXILIARY P.S.

The indicator provides a voltage power supply of 24 Vdc to excite field transmitters with 25 mA current maximum capacity. Available at the back panel terminals 16 and 17.

CUSTOMIZED LINEARIZATION

Three types of signals can be user-customized to fit particular linearization profiles. This means that the operator can configure the instrument to read non-standard crescent non-linear signals with high accuracy.

INSTALLATION

The indicator is designed to be panel mounted. Remove the two plastic fixing clamps from the instrument, insert the unit into the panel cut-out and slide firmly the fixing clamps from the rear against the panel.

RECOMMENDATIONS FOR INSTALLATION

• Input signal wires should be laid out away from power lines and preferably inside grounded conduits.
• Instrument mains (line) supply should be suitable for this purpose and should not be shared.
• In controlling and monitoring applications, possible consequences of any system failure must be considered in advance. The internal alarm relay does not warrant total protection.
• Use of RC filters (47 R and 100 nF, serial) are highly recommended when driving solenoids, contactor coils or other inductive loads.

ELECTRICAL CONNECTIONS

The internal electronics can be removed from the front panel without any cable disassembly. The input signals and power connections are shown in Fig. 1.

Fig. 1 – Back panel terminals

POWER CONNECTION

SENSOR AND INPUT SIGNAL CONNECTIONS

These connections should be properly done and terminals must be well tightened. Thermocouples must be installed with proper extension or compensation cables.

Pt100 RTDs must be 3-wire connected and the wires connected to terminals 22 and 23 should have the same electrical resistance (same wire gauge) for correct cable length compensation. Four-wire RTDs can be connected by disconnecting the fourth wire. Two-wire RTDs can be connected by shortening terminals 22 and 23 and connecting the Pt100 to terminals 23 and 24.

The figures below show the connections relative to each type of input.

Fig. 9 shows the connections for a 4-20 mA transmitter powered by the 24 V power supply of the indicator.

Fig. 9 – Two-wire transmitter with internal power supply

DIGITAL INPUT (DIG IN)

The digital input is activated by connecting a switch (or equivalent) to its terminals, as shown in Fig. 8 above.

ANALOG OUTPUT

The N1500 can deliver either 0-20 mA or 4-20 mA analog output, depending on how the instrument is configured. The output is available at terminals 29 and 30.

OPERATION

The front panel is shown below.

Fig. 10 – Front panel identification

Status Display: Shows the process variable (PV) and the programming prompts.

Indicators A1,   A2, A3 and A4: show active alarms.

Indicators Rx and Tx: indicate RS485 communication line is active.

• PROGRAM key – This key is used to access different displays with the programmable parameters of the device.
• BACK key – This key is used to go back to the previous parameter displayed in the menu level.
• UP / MAX and DOWN / MIN key – It is used to increase and decrease parameters values. These keys are also used to display maximum and minimum values stored in memory.
• FUNCTION key – This special function key is used for preprogrammed functions as explained in the special function key section of this manual.

The indicator requires that the internal parameters be properly configured such as to fit the application need. These parameters are the input type (T/C, Pt100, 4-20 mA, etc), alarms triggering points, alarm functions, etc.

These parameters are divided in five levels (or groups) of parameters which we will refer to as LEVELS.

LEVEL

|

ACCESS

---|---
1 – Work| Free access
2 – Alarms| Reserved access
3 – Functions
4 – Configuration
5 – Customized Linearization
6 – Calibration

Table 4 – Parameters Levels

The work level has free access. All other levels require a certain combination of key strokes to be accessed. The combination is: and keys pressed simultaneously

Once within a level, just press ****to move to the subsequent parameters of this level. At the end of each level the display will go back to the work level.

Note: In order to access the calibration level, however, it’s required to press the keys and simultaneously for 10 seconds. The first parameter in this level is presented (In.LoC) indicating that the calibration level is enabled.

After reaching the intended prompt just press the or keys to change this parameter accordingly. All changes are recorded in nonvolatile memory as we move to next prompt. After 25 seconds with no key pressed the indicator will return to the measuring level (work level).

CONFIGURATION PROTECTION

As safety measure, parameter changes can be prevented by a combination of keys, valid for each level. The protected parameters can be inspected but not modified.

To protect a level press the and keys simultaneously for 3 seconds while in the level. To unlock the level, press and for 3 seconds.

The display will briefly flash confirming that the level was successfully locked or unlocked.

For further protection, the keypad unlock operation can be disabled by changing the position of an internal strap inside the indicator:

When PROT is OFF, the user is allowed to lock and unlock the levels using the keypad as explained above. If PROT is ON, the levels lock/unlock operation is disabled.

Note: It is recommended to disable/suspend the control whenever it is necessary to change the device settings.

PROGRAMMING THE INDICATOR

WORK LEVEL

This is the first level. At power up the indicator will display the Process Variable (PV). The alarm triggering points are also displayed at this level (alarm Setpoints). To advance in this level simply press ****.

Pt100 or thermocouples the display will show the absolute temperature value. For 0-50 mV, 0-5 V, 0-10 V, 0-20 mA and 4-20 mA inputs the display shows the values defined in the “ in.LoL ” and “ i n . k i L ” parameters. With the hold function programmed the display shows the frozen variable and alternates with the message “ koLd ”. Likewise, with Peak Hold function programmed the high limit is displayed with the “ P . k o L d ” prompt alternately. Should any fault situation occur the indicator will display an error message which can be identified at the PROBLEMS WITH THE INDICADOR section of this manual.
AL.rEF| Differential Alarm Reference Value – This prompt is shown only when there is an alarm programmed with differential function. This value is used as a reference for differential alarms triggering.
SP.AL 1
SP.AL 2
SP.AL 3
SP.AL 4| Alarms Set Points 1, 2, 3 and 4 – Defines the operation point of each alarm programmed with “ Lo ” or “ ki ” functions. When an alarm is programmed with a differential function, the alarm setpoint value represents the deviation value of the alarm relative to the reference l.re.

ALARM LEVEL

Fu.AL 1
Fu.AL 2
Fu.AL 3
Fu.AL 4
| Alarm Function – Defines functions for the alarms 1, 2, 3 and 4, configured in ALARM FUNCTIONS section.
oFF: Alarm off;
IErr: Broken or Shorted Sensor;
Lo: Low value;
Hi: High value;
Hi. L o : Differential low;
Hi : Differential high;
diF.LO : Differential outside the range;
diF.Hi : Differential within range.
---|---
HY.AL 1
HY.AL 2
HY.AL 3
HY.AL 4
| Alarm Hysteresis – This is the difference from the measured value to the point where the alarm is turned ON and OFF.
bL.AL 1
bL.AL 2
bL.AL 3
bL.AL 4
| Alarm Blocking – Should any alarm condition occur, the alarms can be individually disabled when energizing the indicator.
AL 1t 1
AL 1t 2
AL 2t 1
AL 2t 2
AL 3t 1
AL 3t 2
AL 4t 1
AL4It 2
| Alarm Timer – The user can set delayed, momentary or sequential alarms by configuring times T1 and T2 according to Table 3.
To disable this function just set zero for T1 and T2.

FUNCTION LEVEL

F,Func|   KEY FUNCTION – Defines functions for the   key. The available options are:
OFF – Key not used;
Hold – Hold PV;
rSt –    Resets Peak and Valley (MAX and values);
P.koL – Peak Hold.
These functions are described in detail in the SPECIAL FUNCTION KEY AND DIGITAL INPUT section.
---|---
D i gI n| Digital Input Function – Defines the function for the digital input. The available functions are the same as for   key:
oFF – Hold – rSt – PHoLd
These functions are described in detail in the SPECIAL FUNCTION KEY AND DIGITAL INPUT section.
Filtr| Input Digital Filter – Adjustable from 0 to 60, this is used to reduce instability of the measured value.
0 means the filter is off and 60 means maximum filtering. The higher the filter value, the slower the response.
oFSEt| Display Offset – This a value which is added to the PV to offset any measurement deviation or sensor error. The offset is shown in the programmed engineering unit. For °F measurements the null reference is at 32 °F.
bRud| Baud Rate – Serial digital communication speed in kbps. Programmable:
1.2, 2.4, 4.8, 9.6, 19.2, 38.4, 57.6, 115.2 (no parity). 1.2P, 2.4P, 4.8P, 9.6P, 19.2P, 38.4P, 57.6P and 115.2P (with EVEN parity).
AdrES| Communication Address – A number that identifies the instrument in a multidrop network.

CONFIGURATION LEVEL

Intyp| Input Type – Selects the input signal or sensor type to be connected to the PV terminals. Refer to Table 1 for options.
Changing the input type causes all other parameters related to PV and alarms to be changed as well, therefore, this parameter shall be the first to be set.
---|---
Dp.poS| Decimal Point Position – Defines the decimal point position in the displayed value. It is displayed when linear input types 0-50 mV, 0-5 V, 0-10 V, 0-20 mA or 4-20 mA are selected at the “ In. YP ” prompt.
Unit| Temperature Unit – Selects °C or °F indication. This prompt is not shown for input types 0-50 mV, 0-5 V, 0-10 V, 0-20 mA or 4-20 mA are selected at the “ In. YP ” prompt.
Sroot| Square Root – This prompt is only shown when input types 0-50 mV, 0-5 V, 0-10 V, 0-20 mA or 4-20 mA are selected at the “inYP” prompt.
Set “YES” and the square root will be applied to the measured value within the limits programmed in “ in.LoL ” and “ in.kiL ”.
The display will show the low limit (in.LoL ) value should the input signal be below 1 % of the range.
ScALE| Scale – Defines the indication range for linear inputs (0-50 mV, 0-5 V, 0-10 V, 0-20 mA and 4-20 mA).
0 Configurable indication from – 31000 to + 31000.
1 Configurable indication from 0 to + 60000.
2 Configurable indication from 0 to +120000. Only even values will be displayed (resolution is not improved).
The selected scale affects values of PV, alarm setpoints and Offset.
In.LoL| Input Low Limit – Sets the low limit for input type 0-50 mV, 0-5 V, 0-10 V, 0-20 mA or 4-20 mA. The range created may have increasing or decreasing behavior in relation to the input signal behavior.
In.Hil| Input High Limit – Sets the high limit for input type 0-50 mV, 0-5 V, 0-10 V, 0-20 mA or 4-20 mA. The range created may have increasing or decreasing behavior in relation to the input signal behavior.
Outty| Analog Output Type – Selects the analog output type to either 0-20 mA or 4-20 mA.
OuLoL| Low Limit for Analog Retransmission – Defines the PV value that results in a 4 mA (or 0 mA) analog output current.
OuHiL| High Limit for Analog Retransmission – Defines the PV value that results in a 20 mA analog output current.
outEr| 4-20 mA Output behavior in case of failures – Defines the output as 4-20 mA when there is an error in the indication.
Do – Applies a value < 4 mA; UP – Applies a value > 20 mA

CUSTOMIZED LINEARIZATION LEVEL

Inp.0 1
Inp.30| Defines the initial and end analog input values for each custom segment line. The values must be entered in the input signal unit:
0-50 mV, 0-5 V, 0-10 V, 0-20 mA or 4-20 mA. For 0-10 V, select 0-5 V.
---|---
out.01
out.30| Defines the corresponding indication that each custom segment is to show. Values are expressed in the desired indication unit (within the Indication Lower and Upper Limits ).

Table 5 shows the sequence of levels and parameters presented in the indicator display. There are parameters that must be defined for each alarm available.

WORK LEVEL| ALARM LEVEL| FUNCTION LEVEL| CONFIGURATION LEVEL| CUSTOMIZED LINEARIZATION LEVEL| CALIBRATION LEVEL
---|---|---|---|---|---
8.8.8.8.8.| *FuAL 1| _ d iGIn| In.tYP| InP.01 -I npP.30| In.loC
ALrEF*| dF.AL1| FiLtr| dP.PoS| InP.01 -out .30| In.HiC
*** SP.AL1*| bL.AL 1| oFSEt_| Unit|  | _ Ou.LoC
 | Al.It 1_| bAud| Sroot|  | Ou.HIC
 | _ Al.It 2| AL.It2| ScA le|  | CJ Lo
 | |  | In.lol|  | H.tYPE
 |  |  | In.LoL|  |
 |  |  | In.H iL|  |
 |  |  | Ou.LoL|  |
 |  |  | Ou.HiL|  |
 |  |  | outEr**_|  |

Table 5 – Sequence of levels and parameters displayed by the indicator

• Parameters that require definition for each available alarm.

CALIBRATION LEVEL

All input and output types are factory calibrated. This level should only be accessed by experienced personnel. If this level is accidentally accessed do not touch the or keys, just press the ****key a few times to go back to the Work Level.

In.loC| Input Low Calibration – Sets the Process Variable low calibration (offset). Several key strokes at   or  might be necessary to increment one digit.
---|---
In.HiC| Input Hi Calibration – Sets the Process Variable span calibration (gain).
Ov.loC| Analog Output Low Calibration – Sets the analog current output low calibration (offset).
Ov.HiC| Analog Output Span Calibration – Sets the analog current output high calibration (span) of the analog output (20 mA).
CJ Lo| Cold Junction Calibration – Allows the user to calibrate the cold junction temperature (at the indicator input terminals) directly in degrees.
HtYPE| Hardware Type – This parameter adapts the firmware to the actual indicator hardware (optional features) and should not be changed by the user.
2 Alarms……………………….. 3
2 Alarms and 4-……20 mA……………… 19
2 Alarms and RS485………………… 35
2 Alarms, 4-20 mA and RS485……. 51
4 Alarms………………………… 15
4 Alarms and 4-20 mA……………… 31
4 Alarms and RS485………………… 47
4 Alarms, 4-20 mA and RS485…… 63

CONFIGURATOR SOFTWARE

Available for free download from the NOVUS website, QuickTune software is the ideal tool to configure the N1500. It also has diagnostic tools.

To configure the device, simply follow the procedure below:

1. Download and install the software on the computer to be used.
2. Run QuickTune, set up communication and start device recognition.

PROBLEMS WITH THE INDICATOR

Connection errors or improper configuration will result in malfunctioning of the indicator. Carefully revise all cable connections and programming parameters before operating the unit. Some error messages will help the user identify possible problems.

or above the configured input signal limit.
nnnnn| Measured value is below the value allowed for the selected sensor or below the configured input signal limit.
—–| Open input. No sensor is connected or the sensor is broken.
Err 1| Pt100 cable resistance is too high or the sensor is badly connected.

Different messages other than the ones above should be reported to the manufacturer. Please inform the serial number if this should occur. The serial number can be viewed at the display by pressing the ****key for about 3 seconds.
The software version of the instrument can be viewed at the time the unit is powered.
When not properly configured, the instrument may show false error messages, particularly those related to the type of input selected.

SPECIAL RECOMMENDATIONS

Should the indicator be repaired, some special handling care should be taken. The device must be withdrawn from the case and immediately placed in an anti- static wrap; protected from heat and humidity.

INPUT CALIBRATION

All inputs are factory calibrated and recalibration should only be done by qualified personnel. If you are not familiar with these procedures do not attempt to calibrate this instrument.

The calibration steps are:

• a) Select the input type to be calibrated.
• b) Set the desired upper and lower display limits.
• c) At the input terminals inject an electrical signal corresponding to a known indication value a little higher than the lower display limit.
• d) Select the inLC prompt. Through the and keys adjust PV so that it matches the injected signal.
• e) Inject a signal that corresponds to a value a little lower than the upper limit of the display.
• f) Select the inkC prompt. Through the and keys adjust PV so that it matches the injected signal.
• g) Repeat steps c) to f) until no further adjustment is necessary.

Note: When verifications are proceeded, note if the Pt100 excitation/activation current the calibrator requires is compliant to the Pt100 excitation current used in this instrument: 0.750 mA.

SERIAL COMMUNICATION

The indicator can be supplied with an asynchronous RS485 digital communication interface for master-slave connection to a host computer (master).

The indicator works as a slave only and all commands are started by the computer which sends a request to the slave address. The addressed unit processes the command and sends back the answer.

Broadcast commands (addressed to all indicator units in a multidrop network) are accepted but no response is generated.

CHARACTERISTICS

• RS485 compatibility with two-wire bus from the host to up to 31 slaves in a multidrop network topology.
• Up to 247 units can be addressed by the MODBUS RTU protocol.
• Maximum network distance: 1000 m.
• Time of indicator disconnection: Maximum of 2 ms after the delivery of the last byte.
• Communication signals electrically isolated from the rest of the instrument.
• Baud rate: 1200, 2400, 4800, 9600, 19200, 38400 or 57600 bps.
• Number of data bits: 8, without parity.
• Number of stop bits: 1
• Time to start response transmission: 100 ms maximum delay after acknowledging the command.
• Protocol: MODBUS (RTU)

Two parameters must be configured to use the serial communication interface: Communications Baud Rate (bavd) and the Communication Address (adres).

RS485 INTERFACE: ELECTRICAL CONNECTION

The RS485 signals are:

REDUCED REGISTERS TABLE FOR SERIAL
COMMUNICATION

COMMUNICATION PROTOCOL

The MOSBUS RTU slave is implemented. All configurable parameters can be accessed for reading or writing through the communication port. Broadcast commands are supported as well (address 0).

The available Modbus commands are:

01 – Read Coils 05 – Write Single Coil
03 – Read Holding Register 06 – Write Single Register

HOLDING REGISTER TABLE

Follows a description of the usual communication registers. For full documentation download the Registers Table for Serial Communication in the N1500 section of our web site –  www.novusautomation.com.

All registers are 16 bit signed integers.

Range: the minimum value is in inlol seted and the maximum value is in inkil seted an the decimal point position depends of dppos.
0003| PV| Read: normalized Process Variable. Write: not allowed.
Maximum range: 0 to 120000.
0004| Display Value| Read: current display value. Write: current display value.
Maximum range: -31000 to 31000.
The range depends of the showed display.

SPECIFICATIONS

• DIMENSIONS: 48 x 96 x 92 mm (1/8 DIN). :Approximate weight: 250 g
• PANEL CUT-OUT: 45 x 93 mm (+0.5 -0.0 mm)
• POWER: 100 to 240 Vac/dc ±10 %, 50/60 Hz
• Optional 24 V: 12 to 24 Vdc / 24 Vac (-10 % / +20 %)
• Max. Consumption: 7.5 VA

ENVIRONMENTAL CONDITIONS:

• Operating temperature: 5 to 50 ºC

• Maximum RH: 80 % up to 30 ºC :For temperatures above 30 ºC, decrease 3 % per ºC :Installation category II, pollution degree 2; altitude < 2000 m

• INPUT: Keyboard selection of input type (refer to Table 1)

• Internal resolution: 128000 levels

• Display resolution:

• Temperature: 1 / 0.1

• Other measures: 1 / 0.1 / 0.01 / 0.001 / 0.0001

• Input sample rate: 5 per second for Pt100 and T/C :15 per second to 0-50 mV, 4-20 mA, 0-5 V and 0-10 V

• Accuracy: Thermocouples J, K, T, N: 0.25 % of span ±1 ºC :Thermocouple E, R, S, B: 0.25 % of span ±3 ºC :Pt100: 0.2 % of span :mA, mV, V: 0.2 % of span

• Input impedance: 0-50 mV, Pt100 and thermocouples: >10 MΩ :0-5 V, 0-10 V: >1 MΩ :0-20 mA, 4-20 mA: 15 Ω (+2 Vdc @ 20 mA)

• Pt100 measurement: DIN 43760 standard (α=0.00385)

• Excitation current: 0.750 mA. 3-wire circuit, cable resistance compensation

• ANALOG OUTPUT: 0-20 mA or 4-20 mA, 500 Ω max. 4000 levels, Isolated

• RELAY OUTPUT: ALM1, ALM2: SPDT 3 A / 240 Vac (3 A / 30 Vdc Res.) :ALM3, ALM4: SPST-NO: 1.5 A / 250 Vac (3 A / 30 Vdc Res.)

• EMC:  EN 61326-1:1997 and EN 61326-1/A1:1998

• SAFETY: EN61010-1:1993 and EN61010-1/A2:1995
  SPECIFIC CONNECTIONS FOR TYPE FORK TERMINALS OF 6.3 MM;

• FRONTAL PANEL: IP65, polycarbonate UL94 V-2;

• CASE: IP20, ABS + PC UL94 V-0;

• START UP: 3 seconds after power up.

• CERTIFICATIONS: CE / UL (FILE: E300526)

ORDERING INFORMATION

A: Series model: N1500
B: Relays outputs: blank (2 relays); 4R (4 relays)
C: Analog output: RT – (Retransmission of the input signal) or Blank
D: Digital Communication: 485 – (RS485, ModBus protocol) or Black
E: Voltage rating: blank (100-240 Vac/dc); 24V (12 to 24 Vdc / 24 Vac)

WARRANTY

Warranty conditions are available on our website www.novusautomation.com/warranty

References

• dif.in is available for purchase - Sedo.com
• Dig.in
• NOVUS Automation Inc. - Controllers, Thermostats, Data Loggers, Solid State Relays, Sensors, Transmitters, SCADA, Data Acquisition and Temperature Controllers

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