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Power Measurement

Process Control

Energy Management

Power Factor Correction Panel
 
 
TEMPERATURE SCANNER SCN 525
Applications
  • Winding temperature monitoring of High Rating Motors, Power Generators and transformers
  • Various parts of Engine bed, Ball bearings, Water and Steam pipe of boilers
  • Various points in Sugar mills, Food processing, Chemical, Cement, Fertilizer & Pharmaceutical Industries
   
Features  
   
  • Microcontroller based design.
  • Accepts RTD, Thermocouple, mV, mA
  • High Accuracy with software linearisation
  • Multiplexing by Analog switches
  • Channel pause & Hold facility
  • Two set points per channel
  • Over range & Open sensor indication
  • Programmable scan time, set point channel pause
  • Alarm and Trip indication for each channel
  • Error compensation at site
  • Digital calibration for each channel
  • Optional : PC Interface
  • Optional : Relay output - Max.32 through external relay unit
  • Compact in size / Modular construction
  • EERAM storage, no battery required
  • Protection against EMI/Stray noise
  • Built-in Watchdog Timer
  • 2 or 4 Relay output
 
    General Description
 
ICD Temperature Scanner Model No. SCN525 is capable to measure and control the Temperature upto 16 points. It accepts temperature sensors like RTDs, Thermocouple, mV and mA signals from Transmitters. The Scanner is completely user programmable like High/Low set point control action, Auto/Manual operation, Channel grouping, Hold, Pause etc. The Scanner is a single board construction with the latest integrated circuit, so as to reduce component counts. Fast AD converter is used for quick refreshing of all the channels input and output. Digital Zero / Span calibration eliminates trim pot adjustments and settings are made through key pad. Maximum 4 relay outputs are given for Alarm & Trip controls. Channel grouping (optional) and control modes are programmable. The Scanner scans all the channels continuously on the background while displaying and generates the Alarm & Trip outputs after comparison with respective settings. The Scanner has two modes of operation: 1. Operator Level and 2.Superior Level The operator level permits channel display selection in Auto, Manual, Hold mode and Alarm acknowledge. Whereas supervisory level access, Alarm & Trip setting, group configuration, output delay adjustments, channel pause function, scan time etc., Optionally, external relay box containing Max. 32 relays can be connected through serial link. The scanner is housed in 96 x 192 x 250 mm flush mounting enclosure.
 
Technical Specfication
  • Type : Temperature Scanner
  • Circuit Design : Microcontroller based Design
  • No. of Inputs : 6, 8, 12 and 16
  • Type of Inputs : a) Direct RTD (PT-100 ohms or 46 ohms)
    b) Thermocouple (Type J, K, R, S)
    c) mV (as specified)
    d) mA (4 - 20 mA or 0-20 mA)
  • Resolution : 0.1°C for RTD, 1°C for thermocouple and 0.1 or 1 unit for other inputs as per range
  • Accuracy : ±0.25% over full scale
  • Type of A/D Converter: 12 bit fast AD Converter
  • Sampling Time : 16 Channel / Second
    • Display
  • No. of Digits : Six (2 digit for channel number and 4 digit for parameter)
  • Type of Display : 7 Segment 0.5" Red LED
  • Scan Time : 1 to 30 Seconds, Programmable
  • Scanning Mode : Auto / Manual
  • Auto Mode : For Automatic scrolling of a Channel
  • Manual Mode : For Continuous indication of a Channel selected and stepping one by one.
  • CJC & BTC Function : Available for thermocouples
  • Over Range Display : Available
  • Open Sensor Display : Available
  • Channel Skip Facility : Available
  • Channel Hold Facility : Available
  • Zero & Span Calibration: Digital Calibration available for each input through keypad
  • Mains Failure : A non volatile EEPROM is used to store the set points, scan time and zero & span calibration constants
    • ALARM / TRIP CONTROL
  • No. of Set Points : 2 Per Channel for Low & High,High & High High or Low & Low
    Low control action
  • Setting Means : Through Key pad
  • Control Output : Common Relay output 1 No. each for two of the set points. Optionally, more relay outputs by grouping the channels or individual alarm output for each input with common trip relay output or individual trip output with common alarm output
  • Contact Rating : 3 Amps, at 240V AC
  • Alarm Acknowledge Facility: Available
  • Status Indication : Normal - No Indication,1st Set Point - Green,
    2nd Set Point - Red
  • Program, Auto, Manual & Hold mode by Red LED Indication
  • Watch dog Timer Supply brown out protection: Available
  • Operating Temperature : 55°C Max.
  • Power Supply : 240V AC ± 10% 50 Hz
  • Option : 110V / 415V AC or DC supply with SMPS
  • Box Dimension : 96(W) x 192(H x 250(D) mm
 
COMMUNICATION (Option)
  • Type : RS485
  • Protocol : MODBUS - RTU
  • Isolation : Provided
  • Traffic Status : Indicated through TXD, RXD LED
 
RELAY BOX
  • No. of Relays : 16 or 32. Two relays per channel or one relay per channel with common alarm relay for all 16 channels.
  • Input : Logic signal from scanner unit through 9 pin 'D' type connector
  • Operating Voltage : 240V AC ±10% 50 Hz
  • Relay Type : PCB soldered 12V DC operated OEN relay
  • Contact Rating : 3 Amps at 240AC
  • Box Dimension : 225(W) x 180(H) x 55(D) mm
 
 
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