Nittan EL.MO. Spa MCMAS5 Technical Manual Download Page 6

MCMAS5

 - TECHNICAL MANUAL - 

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4.4 Jumpers settings

Each jumper (pic. 1a) is a plastic cap with a protruding tab allowing for an easy removal and containing a conductive element on the 

inside. The conductive element realizes an electric bridge between two of the three vertically aligned pins protruding from the board.

Connecting the lower pins activates the function described below the jumpers’ picture on the label; connecting the upper pins activates 

the above function.

JUMPER

SETTINGS

FROM LOOP

Connected devices are powered by the loop (“Power supply” terminals left empty).

EXT. POWER

24 V

DC

 voltage provided by an external power supply unit through the “Power supply” 

terminals.

DISABLE

No power supply unit monitoring (“PSU/fault” terminal left empty).

PSU/FAULT

Power supply unit monitoring. The device expects to see a 24 V

DC

 line voltage at the 

PSU/fault terminal. A fault signal is sent to the control unit and through the LED indicator if 

tension goes to 0 V (including if the line to the PSU/fault terminal gets cut).

4.5 Flush-mount installation

Use a 503 box with blank cover.

Pic. 4 

 Flush mounting

www.acornfiresecurity.com

www.acornfiresecurity.com

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