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N1500LC Indicator 

 

NOVUS AUTOMATION 

3/7 

rSt

 - Clears Maximum and Minimum 

If configured with “

rSt

”, each activation of the 

 key or digital input 

clear the memory for a new cycle of maximum and minimum values. 

kold

 – Freeze Measured Value 

The 

hold

 function freezes the measured value showed in the display. 

Each time the 

  key  or the Digital Input is selected,  there is a 

change from 

hold

 to normal mode. 

Whenever the indicator is in the 

hold

 mode, the message “

koLd

” will 

be displayed so that the operator will be aware that the value 

displayed is the frozen value and not the current reading. 

tarE

 – Tare Function 

It 

is available only in the Digital Input

 configuration or through the 

 

key.  It changes indication to zero (0000.0), regardless of the 

value applied to the input. It is used to eliminate indications of defined 

values. In order to eliminate the tare, the user must press the 

 

key. 

 AND 

 KEYS 

The same 

Tare

 function available for the Digital Input can be quickly 

applied by using the 

 key, which does not need to be set up. The 

 key is used to eliminate the tare applied. 

The indicator accepts successive tares provided that the input signal 

(gross weight) does not exceed the equipment end of scale. 

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 terminals 29 and 30 of the rear panel of the device. 

When this option is available, the retransmission is always enabled 

and does not require any user intervention. 
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 

(

0v.lol

 e 

0v.kol

),at configuration level. These limits 

can be defined freely, and you can make a retransmission with 

increasing or decreasing behavior toward to the indicated value. 
For a voltage output signal an external shunt (calibrated resistor) 

should be installed at the analog output terminals, according to your 

needs. 

LOAD CELL POWER SUPPLY (AUXILIARY P. S.) 

The indicator provides a voltage power supply of 10 Vdc to excite 

field transmitters with 50 mA current capacity. Available at the back 

panel terminals 16 and 17.

 

CUSTOMIZED LINEARIZATION 

The indicator has five types of input for non-linear signals: 

c.4-20

,  

c.0-20

,  

c.50

,  

c.-20

 e  

c.20

 

For using these signals is necessary to adopt the 

Custom 

Linearization

  option. This feature combines the input signal to 30 

user-defined line segments; setting two points for each segment, a 

start and end and the respective display values. Thus the indication 

will have a non-linear behavior set by the input signal. 
The following figure shows an input signal associated with four line 

segments (

a

,

 b

c

, and 

d

) causing that the resulting indication can be 

approximated to the ideal value (characteristic curve). The resulting 

indication is as best as the best straight segments are chosen. 

 

Figure 2

 – Custom linearization for a nonlinear signal. 

Note

: The non-linear input signal shall have 

increasing

 pattern. 

CONFIGURATION PROTECTION 

As a safety measure, parameter changes can be prevented through a 

key combination performed at each level. With this protection, the 

parameters are still displayed but cannot be changed. 
To protect any level, just go to the level and press the keys 

 and 

 simultaneously for 3 seconds. 

To unlock the level, press the keys 

 and 

 for 3 seconds. 

The display will flash briefly to confirm locking or unlocking 

level.

 

Inside the controller, the 

PROT 

key complements the protection 

function. In the 

OFF

 position, the user can do and undo the protection 

of cycles. In the 

ON

  position cannot make changes, if there are 

protections cycles these cannot be removed; if there is not, they 

cannot be promoted. 

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  

  The wires of the input signals must be installed separated from 

the output wires and power, if possible, in grounded conduits. 

  The power supply for the instruments must be provided from an 

exclusive power source. 

  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 whole inner part can be removed without the need to make any 

disconnection. 

Figure 3

 shows the connection arrangement at the rear 

panel of the indicator. 

 

 

 

Figure 3

 – Back Panel Terminals 

Power Connection 

First check if the voltage required by the indicator is compatible with 

the voltage of instrument power supply. Provide adequate protection 

devices. 

 

 

 

Figure 4

 – Power Connection 

 

 

 

Summary of Contents for N1500LC

Page 1: ...utomatic zero functions Digital input Optionally can have Process Variable PV retransmission in 0 20 mA ou 4 20 mA RS485 MODBUS RTU serial communication 3rd and 4th alarm relays The front panel is sho...

Page 2: ...with value 0 zero The Warning 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...

Page 3: ...to adopt the Custom Linearization option This feature combines the input signal to 30 user defined line segments setting two points for each segment a start and end and the respective display values T...

Page 4: ...HE 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 i...

Page 5: ...et also obey these limits In lol Input Low Limit Determines the minimum limit for input signals The band created can be ascending or descending characteristic in relation to the input signal behavior...

Page 6: ...erly 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 car...

Page 7: ...e the serial communication interface Communication Baud Rate bavd parameter and Communication Address adres parameter SPECIFICATIONS DIMENSIONS 48 x 96 x 92 mm 1 8 DIN Approximate weight 250 g PANEL C...

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