The PID differential temperature controller with two 3-digit LED seven segment displays, 4 keys and 3 relays is variably applicable due to its freely programmable general functions. The relay contact K1 directly affects the main setpoint, formed by reference variable and the given offset temperature. Contact K2 affects the secondary setpoint which is formed by the main setpoint via overlap or which alternatively can be freely defined. Contact K3 affects adjustable limit values.
