Madas M90W Guia Del Usuario página 10

4.0 - ELECTRICAL CONNECTIONS (see diagrams fig. 3 and 4)
They must be carried out with the system stopped and NOT electrically powered.
• Prior to carrying out any electrical wiring operations, make sure that the mains voltage matches the supply voltage indicated
on the product label.
• NOTE: The wiring operations must be carried out ensuring the product's IP65 protection rating;
• Undo the fixing screws (8) and remove the cover (9).
• Connect the power supply to the power terminals and the earth cable to the
terminals. The 12 V and 24 V versions can be powered both with direct current and with alternating current. The connection
terminals are not polarised.
• For the electrical connection, use the cable indicated in the valve instruction sheet:
• Relay for alarm/failure output max 0.5A resistive:
N.O. : Normally open contact
C : Common contact
N.C. : Normally closed contact
• Normally closed contact - EXT IN
Contact to be used for connection with gas leak detector or for emergency closure button. The contact is dry and must not
be powered.
• After making the connection put the cover (9) back in its original position and fasten it using the relevant screws (8) making
sure that the gasket (10) is inside the groove.
5.0 - DIP SWITCH (6)
MADAS seismic sensors are suitable for use with normally open (N.O.) or normally closed (N.C.) valves.
®
The type of solenoid valve is selected via the internal DIP switch
DIP switch no. 1: (solenoid valve type selection):
ON = N.C. solenoid valves
OFF = N.O. solenoid valves
DIP switch no. 2 (sensitivity selection):
A2 = normal
A1 = increased sensitivity
EXAMPLES
• Configuration for N.C. solenoid valve (DIP Switch 1 -> ON)
and normal sensitivity (DIP Switch 2 -> A2)
• Configuration for N.O. solenoid valve (DIP Switch 1 -> OFF)
and normal sensitivity (DIP Switch 2 -> A2)
M90W
terminal using the appropriate cable
N.C. ON
1 2
N.O.
N.C. ON
1 2
N.O.
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Madas Technical Manual - 9|9.3 - REV. 0 of 10
A2
A1
A2
A1
May 2018
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