II – Indoor Controlled
67mm x 14mm x 12mm
5 Screw Double Reed Surface Contact (N/O N/C)
This variant of the D20 is equipped with two reeds. One reed is Normally Open whereas the second reed is Normally Closed. Having both options available allows for flexibility in installation.
2 nickel terminals wire to the first reed, 2 brass terminals wire to the second. A central brass terminal is left as an unlinked spare for any additional wiring.
Comes complete with fitting screws.