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DEPT-485 (Àå±â Àç°í)
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Only one transducer for 13 simultaneous readings in real time.
DEPT-485
Digital electrical parameters transducer
(with RS485 data output)

   

Programmable microprocessor- based digital energy transducer offering
outstanding measurement
accuracy and
reliability, suitable
for operation in
harsh environments
and fully compliant
with international
standards.

GENERAL SPECIFICATIONS
   

13 READINGS.
ENERGY, DEMAND
AND MAXIMUM
DEMAND
COUNTERS.
HIGHEST
ACCURACY
AND STABILITY.
20-YEAR
BATTERY-FREE
DATA RETENTION.
¡Ü Only one transducer for 13 simultaneous readings in real time.
¡Ü For single-phase and balanced three-phase electrical systems.
¡Ü RS485 data output with galvanic isolation.
¡Ü MODBUS protocol.
¡Ü Digital operation for high measurement stability.
¡Ü Programmable CT and VT ratios for direct readings.
¡Ü PC-controlled programming, synchronisation and re-set.
¡Ü Galvanic isolation on inputs and outputs.
¡Ü Automatic scale change and overload protection on inputs.
¡Ü High immunity to external interference.
Patented microprocessor-based digital transducer of outstanding accuracy and versatility.
Readings are RMS measured by a digital circuit ensuring maximum accuracy, reliability and stability over time.
The automatic scale change for voltage and current ensures the highest accuracy in the range 20 mA to 6 A and 20 Vac to 750 Vac.
Current and voltage autoranging also provides a dynamic range of 500 on power. while automatic amplifier offset correction prevents accuracy drifting Vs. temperature and over time.
The unit measures:
U RMS Voltage (Volt)
I RMS Current (Amp)
P Active Power (Walt)
P.F. Power Factor (Cos¥Õ)
S Apparent Power (Volt amp)
Q Reactive Power (Volt amp reactive)
Pm Average Active Power (sliding window)
Sm Average Apparent Power (sliding window)
PMD Maximum demand on Active Power (peak)
SMD Maximum Demand on Apparent Power
EA Active Energy Consumption
ER Reactive Energy Consumption
F Frequency
The average power values (demand) are calculated by sliding window mathematics over a programmable integration period.
The values compare with the demand metered by the energy supply board.
Maximum demand readings are the highest


recorded averages and represent the peak value used by the energy supply board billing. The readings may be synchronised with the main meter and reset via computer.
Energy consumption is totalled on an internal 10-digit counter with 0.01 kWh to 99,999,999.99 kWh resolution. The counter may be reset via computer.
Readings are supplied as real values expressed in scientific notation (mantissa + exponent), which take into consideration any CT or VT ratios.
The unit may be programmed by external PC-run software (ELEX) via RS485 port.
User-programmable settings are handled by the unit internal 32-bit floating-point mathematics ensuring maximum accuracy and best performance.
All set-up data, counter and maximum demand values are stored in a battery-free EEPROM memory with virtually unlimited memory retention. The unit is suitable for both single-phase and balanced three-phase systems and is particularly suited for motor control applications. The RS485 data output and MODBUS protocol make DEPT-485 the ideal choice for networking PLC or PC running SCADA software.
A standard twisted pair provides reliable communication for up to 32 instruments over a distance of 1000 m. without ampli-fication. The use of additional line amplifi-ers allows further blocks of 32 units to be connected up to a maximum of 247 instru-ments.



The transmission speed may be user set to 2400, 4800 or 9600 bps.
DEPT-485 is the ideal solution for process control, network monitoring, energy and maximum demand cost-accounting and management applications. Microproces-
 

sor-based technology, the absence of potentiometers and the use of high-stability components make DEPT-485 an extremely versatile instrument suitable for both building control and industrial applications. Testing and Calibration are performed using an automated digital calibration system.
Each instrument is delivered with a certificate of conformity and calibration. All the inputs and outputs are galvanically isolated to guarantee complete operation safely in any type of installation and designed for highest immunity to external disturbance.

     PROGRAMMING

  BAUDE RATE SELECTION
  (DIP-SWITCH 1-2)
  
   ¡Ü 2400 bps
  ¡Ü 4800 bps
  ¡Ü 9600 bps

  SINGLE/THREE-PHASE
  (DIP-SWITCH 3)

  PARITY SELECTION
  (DIP-SWITCH 7-8)

  DIP7 ¡Ü  EVEN ¡Ü  ODD
  DIP8 ¡Ü  PARITY ¡Ü  NO PARITY

     TECHNICAL SPECIFICATIONS

  Inputs:
  Voltage:
500 V, 20 to 800 Hz;
  Current: 5 A, 20 to 800 Hz
  CT burden: <0.5 VA
  Voltage impedance: 2 M ¥Ø/input
  Overload: Voltage input: max. 800 Vrms Surge voltage: 900 Vrms (for 1 sec.)
  Current input: max. 20 Arms
Surge current: 100 Arms (for 1 sec.)
  Output: RS485 data output with galvanic isolation
  Accuracy: 0.25% V and I; 0.5% power as per CEI EN 60688 standards; Class 1 for energy as per IEC 1036 standards
  Power supply: 200-240 Volt ¡¾ 10% 50/60 Hz (100-120 Vac available on request)
Consumption: 3VA
Temperature range: -10 to +60¡É
Relative humidity: 90% max., non-con-densing
Standards: IEC1010, VDE 411, Class II with external cabinet
Electromagnetic compatibility:
EN 500820-1; 1992 EN 50082-2; 1994
Autorange: 2 voltage scales, 3 current scales
Offset: automatic amplifier offset correction
Mounting: DIN rail
Size: 105 ¡¿ 90 ¡¿ 58 mm. (6 DIN modules)

     SIZE



     APPLICATIONS

¡Ü Data acquisition systems for quality control of industrial processes.
¡Ü Networks for monitoring electrical energy consumption and the status of equipment (motors,transformers).
¡Ü PC-based cost-accounting and association of electrical energy costs.
¡Ü Automation and process control systems.




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