3-point Controller 1281 & 1284

The E-Module type series 1281 and 1284 is for the manual or automatic setting or control of motorized valves, hence for GEMÜ type series 413/418, 613/618 and 693/698.

The valve adjustment "open" and "closed" is initiated by a relay.   This energizes the valve actuator until the differences between the actual and the required valve setting is less than the control hysteresis, i.e. it readjusts the valve position.

Over the whole of the control range, switching points are adjustable as minimum and maximum values by means of a potentiometer.  These points are indicated by LED’s and the presence of the supply voltage is also indicated by a mains LED

In addition, on the type 1284, the actual travel of the valve is shown by a chain of LED’s in the form of a rising column of light.  By linking an internal bridge, the set value (required value) can be indicated.

The module provides a standardized output signal which can be 0 to 20 mA or 4 to 20mA.   This output signal can be used for external remote indication or for further processing of the signal corresponding to the valve position.

Type 1281 
For panel mounting or direct mounting on the valve

type 1281

Type 1284  
For panel mounting or direct mounting on the valve with additional LED indication (light column).

type 1284

Ordering references for direct mounting

Direct mounting units cannot be altered for panel mounting.

Ordering references for panel mounting

*Dead zone setting 0.5 – 5%
**Dead zone setting 1.5 – 15%