User Manual
ADCP-75-110 • Issue 2B • July 2001
Page 38
©
2001,
ADC
Telecommunications,
Inc.
5.
Connect
the
Minor
alarm
wire
pair
to
the
MINOR
COM/NC
or
MINOR
COM/NO
terminals
(whichever
is
required
by
the
external
alarm
system)
on
the
DHU
alarm
terminal
connector
as
shown
in
Figure
22.
6.
Connect
the
Major
and
Minor
alarm
wire
pairs
to
the
appropriate
terminals
on
the
external
alarm
system.
7.
Dress
and
secure
cable
per
standard
industry
practice.
3.11 AC Power Connections
The
AC
power
interface
between
the
DHU
and
the
AC
power
source
is
supported
by
a
3-wire
AC
power
cord
connector
located
on
the
DHU
front
panel.
The
AC
connector
provides
a
connection
point
for
the
power
cord
which
is
provided
separately
with
the
DHU.
Use
the
following
procedure
to
install
the
AC
power
cord:
1.
Locate
the
AC
power
cord
which
is
provided
separately
with
the
DHU.
Use
only
the
AC
power
cord
provided
with
the
DHU
or
an
equivalent
UL/CUL
listed
3-conductor,
18
AWG
cord
terminated
in
a
molded-on
plug
cap
rated
125
V,
15
A
with
a
maximum
length
of
6
feet
(1.8
m).
Note:
The
DHU
is
intended
to
be
used
with
a
3-wire
grounding
type
plug
which
has
a
grounding
pin.
Equipment
grounding
is
required
to
ensure
safe
operation.
Do
not
defeat
the
grounding
means.
Verify
DHU
is
reliably
grounded
when
installed.
2.
Place
the
DHU
AC
power
ON/OFF
switch,
shown
in
Figure
23,
in
the
OFF
position
(press
O).
16431-A
AC POWER CORD
Figure 23. AC Power Connection
3.
Connect
the
receptacle
end
of
the
power
cord
to
the
AC
connector
on
the
DHU.
4.
Route
the
plug
end
of
the
power
cord
to
the
specified
AC
outlet
(per
the
system
design)
and
connect
plug
to
outlet.
Warning:
The
current
rating
of
the
DHU
is
2.0
Amps
at
120
Vac.
Avoid
overloading
circuits
which
may
cause
damage
to
over-current
protection
devices
and
supply
wiring.