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Ramp and soak profile PID temperature controller

Maxwell PU90 ramp and soak PID profile multile steps controller is a touch key temperature controller, the process value changed based on predetermined ramping rate and soak rate. process value changes based on a curve over time, the output can be Relay to drive an AC contrator, or SSR Drive to drive an external solid state relay, or 4-20mA analog outputs, the setting keys on the panel is touch key with a responsive sound, it is not a conventional setting key where it goes down a little bit when you push it, it's a touch key which makes it very durable. high sampling rate and RS-485 optional.

  • Item no.:

    PU90 Series
  • Ordering code:

    PU90-48-R-N-1-96-N-N Relay output

Ramp and soak profile PID temperature controller

-Key features

● Ramp and soak controller also known profile controller
● TC/RTD analog input
● Multiple profiles
● Touch key
● Run/stop/jump function
● Maximum IP65 protection
● Maximum 30 segments/steps
● RS-485 communication
● PV/SV re-transmission
● PC configuration software
● 0.25%F.S accuracy
● C/F display selectable
● 85~265Vac or 24VDC
● 24VDC auxiliary power source
● Free PC software available so that you can build the profiles on your PC
● You can export the profile to your PC and import the file whenever you want to run a profile later on
● Below is an example of a pattern with 8 segments from the software interface


Here is an example of how you can program the PU90 ramp and soak controller from your PC by using our free software, hardware needed as below

1)PU90 with RS-485 feature
2)USB to RS-485 adaptor
3)A personal computer(PC)

The curve we are going to cover today has a trajectory as below

Step 1) Curve starts at 100 degree, and takes 60 minutes to heat the system up to 400 degree
Step 2) Temperature of the system stays at 400 for 60 minutes
Step 3) Temperature drops from 400 to 250 within 120 minutes
Step 4) Temperature goes up again from 250 to 300 within 50 minutes
Step 5) Temperature stays at 300 for 180 minutes
Step 6) Temperature drops from 300 to 100 within 200 minutes
Step 7) Temperature stays at 100 for 70 minutes
Step 8) Program terminated.

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