SENTROL Application notes - Alarms BC

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Residential & Commercial Applications
PROTECTING CHAIN-LINK ROLLING GATES
APPLICATION
INSTALLATION
RECOMMENDED
PRODUCTS
For most chain-link rolling gates, there is considerable tolerance and leeway in the
“closed” position. This makes it difficult to assure proper alignment of the gate
switch for alarm protection. This application assures security, particularly when a
high-security biased switch is used.
Mount switch on fence post using appropriate sized bracket (see Sentrol catalog
for bracket selection).
Mount multiple magnets (usually three) on wood strip with 2" (5 cm) spacing
center-to-center. Mount board on gate. Be sure to observe polarity of switch and
magnets by aligning both so “Sentrol” labels read in same direction. (Observe
minimum gap of 3/4" (1.9 cm) when using Sentrol 2507AH switch.)
Alternate Installation: Use magnet 1923 as alternate. Mounting board should be
2x4 with 3/8" (0.95 cm) diameter holes (see illustration). Observe minimum gap
distance and polarity. Red end of 1923 should be in same direction as wire lead
end of switch.
Note: To prevent false alarms, keep gate fastened tight using a chain or other
restraining device.
Important: Switch cable of various lengths can be ordered from factory.
Switch — 2507AH; Bracket — 1941, 1942; Magnet — 1920, 1923
2507A-H
Switch 2"
1923 Magnets
2" x 4"
Mounting
Board
Red End
1941 or 1942
Bracket
1920 Magnets
“Make”
distance of 6"
to 8"
MAGNETIC CONTACTS
3.49