¡El controller series comprises five freely configurable, universally usable compact controllers in various DIN formats to control temperature, pressure, and other process variables. ¡El devices are characterized by a simple, clearly structured operation supported with texts. Process values and parameters are represented by two 18-segment LCD displays. ¡El types 702112, 702113 and 702114 are additionally equipped with a pixel matrix LCD display for dis playing text. In addition, all devices have individual display elements for the switch positions of the outputs as well as for manual mode, ramp function, and timer. ¡El devices are operated us ing a membrane keyboard with four buttons and can be used under harsh environmental influ ences thanks to the high IP65 protection type. Depending on the hardware design, the devices can be used as two-state controllers, three-state controllers, three-step controllers, or continuous controllers. ¡El basic type includes autotuning, a ramp function, a program controller, manual mode, limit value monitoring functions, digital con trol signals, extensive timer functions, and a service counter. A math and logic function is also available as an option. Furthermore, the user has the option to create his/her own application using structured text (ST code). ¡El devices can be conveniently configured using a PC with the help of the setup program (incl. program editor and ST editor). No separate voltage supply is required when configuring via the USB interface (USB-powered). feature: • Fixed-setpoint controller or program con troller • 2 parameter blocks • Autotuning • Setpoint changeover (4 setpoint values) • Ramp function • Timer function • 4 limit value monitoring functions • Service counter • Individual user level • Own application using structured text (ST code; option) • Math and logic function (option) • Fast wiring through Push-In technology • RS485 or Ethernet interface (option) • Additional analog and digital inputs via in terface