Owner's Manual

12
WIRING RADIO RECEIVERS
An auxiliary transformer mounted on the AC input junction box
is used to power ancillary
equipment. THIS IS A CLASS II TRANSFORMER AND IS
EQUIPPED WITH AN INTERNAL FUSIBLE LINK. IF THIS
LINK IS "BLOWN" THE TRANSFORMER MUST BE
REPLACED. The transformer is powered at all times when the
operator main power switch is ON. It is not fused by any of the
fuses on the Control Board. The maximum power that can be
supplied by this auxiliary transformer is 25VA or about 1
ampere at 24VAC. This is usually sufficient to supply most
ancillary equipment such as a radio, loop detector or card or key
pads.
IF THE AUXILIARY TRANSFORMER IS USED TO POWER A
RADIO RECEIVER, THEN, NO OTHER EQUIPMENT MAY BE
CONNECTED TO THE AUXILIARY TRANSFORMER. When
a radio receiver is connected to the transformer for power, one
end of the receiver relay must be connected to the common
terminal on the barrier strip. This will effectively ground one
side of the auxiliary transformer even if it is a "4-wire" receiver-
--in most cases. Many other auxiliary devices, such as card
readers and key pads, (using bridge rectifiers) require that both
sides of the transformer supplying power be "floating" and not
grounded. Failure to observe this restriction will damage the
added device.
WIRING RADIO RECEIVERS TO THE TERMINAL
STRIP.
Radio Receivers may be either 3-wire (terminal) or 4 wire units.
THE 4 WIRE VERSION OF THE RECEIVER IS PREFERRED
SINCE NO ADDITIONAL CONNECTIONS TO THE
RECEIVER WILL BE REQUIRED.
THREE WIRE RECEIVERS
If a three terminal receiver is to be used, the #1 terminal is
COMMON (sometimes labeled as 24VAC on the radio) to both
the power input and the relay contact. This applies to radios
from most manufacturers. A wire must be connected from
terminal #1 of the receiver to terminal #1 (COMMON) of the
terminal strip. Another wire must be connected between
terminal #1 of the terminal strip and one side of the
C
: INSTALLING THE OPERATOR
107035
Figure 13: Wiring 3-Button Station
NOTICE: A separate 3-wire (HOT, NEUTRAL and
GROUND), 115 VAC electrical connection is required for
each operator in a bi-parting installation
(Left)
(Right)
107036
Figure 14: Bi-Parting Wiring
Connect radio
as shown on
Page 11 of this
manual.