Accessory manuals for most make and model accessories can be found
on the web at:
The accessory manuals you have or find at the above address may be written to coincide with
that manufacturers model of gate opener. To determine correct terminals on your Estate Swing
operator, use the accessory terminal section of your Estate Swing manual. The following are
some common terms and abbreviations found in manuals:
Normally Open – abbr. N/O – Indicates a circuit that is left open during normal operation of
the gate operator. When a device closes this circuit it signals the operator to perform a function.
This circuit is the main circuit for entry devices. (i.e. keypads, exit wands, push buttons, etc.)
Normally Closed – abbr. N/C – Indicates that in order for the gate opener to be active this cir-
cuit must be closed. When a device opens this circuit it stops the motion of the gate operator.
This circuit is the main circuit for safety devices. (i.e. photo eyes, safety loops, etc.)
Common – abbr. COM – This is the matching terminal for both Normally Open and Normally
Closed circuits to be connected to. Accessory wiring that begins in a N/O or N/O terminal must
have a wire that ends in a Common terminal.
Ground – abbr. GND or GRD – Ground is sometimes also known as negative. Common termi-
nals are the same as Ground terminals. Ground can also be the negative spade of the battery if it
is being used in association with positive voltage.
If a device has both a N/O and a N/C wire, both are never used at the same time. Some devices
can be used as either an opening device or a safety device (i.e. gate crafters exit wand, NIR
photo eye, etc.) If being used as an opening device use the N/O and if being used as a safety de-
vice use the N/C terminals.
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