FREE Optima

PLCs programmable to the IEC61131 standard with libraries specifically for HVAC applications.
They are available in both DIN-rail-mounted versions (OTD with display, OTB blind), and soon to be available in 32x74 panel-mount format (OTF).
I/O expansions (EVE) and displays (OTDLED) can be combined with FREE Optima series models to complete the offering.
Inputs and outputs are independent and configurable, ensuring adaptability to any system.

OTBM22R

FREE Optima Blind 22 I/Os, 2 RS485

OTBM22R
OTBM22RH

FREE Optima Blind 22 I/Os, 2 RS485 100-240Vac

OTBM22RH
OTDM22R

FREE Optima Display 22 I/Os, 2 RS485

OTDM22R
OTDM22RH

FREE Optima Display 22 I/Os, 2 RS485 100-240Vac

OTDM22RH
OTDEM22R

FREE Optima Display 22 I/Os, 2 RS485, EEVD

OTDEM22R
OTDM22S

FREE Optima Display 22 I/Os, 2 RS485, 2 SSR

OTDM22S
OTDM22SH

FREE Optima Display 22 I/Os, 2 RS485, 2 SSR 100-240Vac

OTDM22SH
OTFM22R

FREE Optima Flush mount. 22 I/Os. 2 RS485

OTFM22R
OTFM22S

FREE Optima Flush mount. 22 I/Os. 2 RS485, 2 SSR

OTFM22S
OTDLED

FREE Optima Remote Display LED

OTDLED
Release Notes FREE Studio Plus 1.8.0
09/06/2025
1.27MB
Brochure FREE Optima
30/04/2024
5.56MB
Moving to FREE Studio Plus
30/09/2019
1.53MB
Release Notes FREE Studio Plus 1.10.0
16/04/2026
1.48MB
Operating Guide FREE Studio Plus
28/02/2026
15.73MB
INTRODUCTORY PRESENTATION
Installer, Distributor / Wholesaler, System Integrator (FREE Way), End user

ET6 HMI: Reliable and affordable touchscreen panels

EN IT DE
Watch the presentation
TECHNICAL PRESENTATION
System Integrator (FREE Way)

FREE Optima: the next gen PLC

EN IT
 Watch the presentation
Universal Controller
Applications

Universal Controller

HowTo manage multiple views on Free Optima
Others

HowTo manage multiple views on Free Optima

HowTo have faster boot - Disable MBM
Others

HowTo have faster boot - Disable MBM

HowTo mirror variables to SI
Others

HowTo mirror variables to SI

Modbus Addons
Libraries

Modbus Addons