EARTH GROUND & POWER CONNECTIONS
Earth Ground
For the best ground, use size 14 gauge solid wire or larger to
connect the EARTH GROUND terminal to an 8-foot copper
ground rod. Locate the ground rod next to the Power and
Telephone company rods and bond the rods together with a
new clamp. Do not disturb the clamps installed by the
Power or Telephone Company.
Alternately, connect the EARTH GROUND terminal to a cold
water pipe or to the GND terminal on the AC transformer.
Power
The AM/II is powered by a 16.5 Volt, 20 VA to 50 VA, internally
fused, UL listed, Class 2 transformer. This transformer is
included with the AM/II system pack.
The system can alternately be powered from a 12-35 VDC or
14-24 VAC auxiliary power supply. Refer to the chart below for
selecting wire size for the distance to the power source.
Typically DC power is used when battery backed-up
uninterruptable operation is required. The externally charged
battery must be capable of supplying the power requirements
of the AM/II and it’s complement of devices.
✘
WARNING! Never short the terminals of the transformer
together. This will cause the internal fuse to blow. The
transformer must be connected to a 120 VAC 60 Hz
unswitched (24 hour) power outlet not controlled by a
wall switch.
STEP 1 Be sure that the AM/II POWER switch is off.
STEP 2 Connect the transformer to the AC terminals
or
connect the AM/II to the operator’s auxiliary power
output.
✘
WARNING! Do not connect both AC and DC power.
STEP 3 If used, plug transformer into AC outlet and secure
with case screw (if provided).
☞
NOTE: Never power door strikes or other high current
magnetic devices from the same power source as the AM/II.
AM/II
EARTH
GROUND
TERMINAL
AM/II & POWER CO.
GROUND STAKES
BONDED TOGETHER
14 GA
SOLID
DO NOT
DISTURB
POWER CO.
GROUND!
A COLD WATER PIPE
OR THE AC TRANSFORMER
GND TERMINAL MAY ALSO
BE USED FOR EARTH GROUND
POWER
OFF
ON
EARTH
GROUND
14 - 24 VAC
12 - 35 VDC
AC POWER
INPUT
DC POWER
INPUT
TRANSFORMER
16 VAC, 20 VA
AC
AC
GND
CONNECT EITHER
AC OR DC POWER
NOT BOTH!
POWER WIRE DISTANCE
MINIMUM WIRE SIZE
1-50 FEET
18 AWG
51-150 FEET
16 AWG
151-250 FEET
14 AWG
251-500 FEET
12 AWG
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