M2B+ Controller
2-2 General Description
The M2B+ is a microprocessor-based process controller designed for use with temperature
control units. The M2B+ monitors and maintains the temperature of the fluid in any given
process to a selected setpoint using a unique proportional integral derivative (PID) auto-
tuning program. The controller employs PID algorithms to automatically tune the system to
heat or cool the fluid as required by the process.
The M2B+ has a Liquid Crystal Display (LCD) that provides all operational status and
programming menus. The controller includes self-diagnostics to check hardware functions.
All diagnostic information is displayed in the second line of the Liquid Crystal Display.
The M2B+ is panel-mounted and has a membrane keypad with tactile feedback. When
properly installed with a sealing gasket, the M2B+ meets NEMA 4 or IP66 integrity.
10 of 65 Chapter 2: Functional Description
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