VT26+ SERIES

(Fuzzy Enhanced)

WITH SOFT START AND OTHER ENHANCMENT FEATURES


The VT26 Series FUZZY ENHANCED PID din controllers utilize the very latest fuzzy logic "Auto Tuning" technology aimed at giving you the best possible control even in the most difficult applications. This controller has a host of enhancements including a "RAMP" function and a very useful "SOFT START" especially aimed at the plastic industry where slow heating of elements to avoid damage is required. With this feature you can limit the "output power" to a low value until the heater has warmed up and is ready for full power heating. Generally used with relay output to switch an external relay or contactor but for better results, in order to benefit from this high level control technology, these controllers should be used in conjunction with Solid State Relays or Thyristor Power Regulators.

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FEATURES

Inputs + Ranges

 

Type J, K, T, E, B, R, S, N, C
RTD Din PT100: JIS PT100
Linear 4~20 mA, 0~50 mV, 0/1~5Vdc

 View Inputs and Ranges
   

Outputs

 

 
  • Relay (10 amp @ 240 Vac)
  • SSR (24 Vdc)
  • Analog (4~20 mA, 1~5 0~10 Vdc etc)(Voltage output limit is 24 mA)
  • Heat/Cool also available.
   

Control Action

 This is a full three term FUZZY ENHANCED PID auto tuning temperature controller. Auto tune PID, PD, P or on/off with adjustable deadband
   
Soft Start Function This function uses 2 paramaters. The first is a target temperature below which the output will be limited to the value set in the second paramater. So as an example you have a target temperature of 100 deg C and as long as the measured temperature is below that the output can be limited to any value between 0 and 100 % of full power, so say 20% or whatever you require.
   
Ramp Function The ramp can be used separately from the “Soft Start” or in conjunction with as you please. With the Ramp value set to 0 the ramp is disabled. When a value has been set in Deg C / min each time a setpoint change is made the setpoint will ramp at the set rate from the original value to the new setpoint value. This can be set between the range of 0 ~ 9999 ?/min (0.0 – 999.9)
   

Alarms

 

 

 
  • 2 alarms are standard with all models
  • The alarm action is fully configurable making them a very useful tool. The configurations available include high, low, deviation high/low, band and timer linked alarms
  • There is a feature to deactivate the alarms on initial start-up to avoid nuisance trips
  • Latch alarm function is also available
  • The alarms can be converted to SSR output but will provide a 6 / 7 Vdc signal (Which is fine for any 3 or 4 ~ 32 Vdc SSR)
   
Dead Band There is an adjustable dead band when the controller is used in the on/off mode. This is sometimes referred to as a "hysterisis" setting.
   

Cycle Time

 

 

 

 There is an adjustable "cycle time". This is set primarily to suit the type of control element you are using. For a mechanical contactor/relay it is normally set to 15 seconds, to prevent excessive ware and tear on the contactor. For Solid State Relays it is set to 1 to give a much faster switching time aimed at delivering smaller incriments of energy to the load, thereby making it possible to get tighter control and 0 seconds for analog control
   
RS485 Comm's Full Modbus RS485 comm's available
   
Parameter Retransmission Process value or setpoint value re-transmission is available however you can only have either Output 2 or Re-transmission but not both.
   
Auxiliary Power Source A 24 Vdc 40 mA auxiliary power source is available to drive 4 wire input devices
   
Parameter Locks There are parameter locks, user configurable, at varying levels, making it possible to lock parameters and avoid unwanted tampering
   
User Menu Configurable You can hide some unwanted functions in the menu from prying hands
   
Din Sizes
  • VT9620 ....96w x 96h
  • VT7220....72w x 72h
  • VT4820....48w x 48h
  • VT4920....48w x 96h

2 YEAR WARRANTY

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SPECIFICATIONS

Power supply

90~264 Vac. 50/60 Hz ..or..90~264 Vdc ..or..24 V ac or dc with a tolerance of 10%. That does not mean you can use a supply of 26 Vdc it is 24 V which can tolerate short term variations of 10%.
Inputs and Ranges Type J, K,T, E, B, R, S, N, C and PT100 selectable from front panel View Inputs and Ranges
Outputs
  • Relay (10 amp @ 240 Vac)
  • SSR (24 Vdc)
  • Analog (4~20 mA, 1~5 0~10 Vdc etc)(Voltage output limit is 24 mA)
  • Heat/Cool also available.

Choose from above when ordering

Alarm
  • 2 alarms are standard with all models
  • The alarm action is fully configurable making them a very useful tool. The configurations available include high, low, deviation high/low, band and timer linked alarms
  • There is a feature to deactivate the alarms on initial start-up to avoid nuisance trips
  • Latch alarm function is also available
Control
  • Full Fuzzy Enhanced three term PID control action
  • Proportional Band 0.0% ~ 300.0%
  • Integral Time 0~3600 seconds
  • Derivative 0~900 seconds
  • Hysterisis 0.0~200.0 or 0.0~2000
Cycle Time
  • Adjustable (0 ~100 seconds)
  • Relay or contactor 15 seconds
  • Solid State Relay 1 second
  • Analog 0.0 seconds
Accuracy
  • Thermocouple ............± 1.0 º C
  • RTD .............................± 0.2 º C
  • Linear...........................± 3 mV
Ambient Temp 0 ~ 55 º C
IP Rating
  • IP63 (We claim IP63 when installed in a panel but have no test certificate)
Humidity 0-90% non-condensing
Power Consumption Less than 5 VA
Sampling Rate Four times every second 100 mS

 

2 YEAR WARRANTY


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CONNECTIONS



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