Advertisement
3
3
PRECAUTIONS ON INSTALLATION & WIRING
CAUTION
★ LEM equipment, except for LE-D or LE-DA, is designed for indoor use only.
Do not install outdoors.
★ LEM is an electrical device, which must not be exposed to water or any other liquid.
★ Do not connect AC wires to any terminal on any unit.
★ Do not connect any power source other than specified to terminals +, – on LEM.
Doing so can cause fire or damage the unit.
★ Unplug power supply while making any wire terminations.
★ Do not install LEM equipment in any of the following locations, as it may cause the system to malfunction;
– High or extreme cold temperature areas: under direct sunlight, near equipment that varies in temperature, in
front of air-conditioner, inside a refrigerated area, etc.
– Places subject to moisture or humidity extremes,
– Places subject to environmental conditions, such as oil, dust, chemicals, salt, etc.
– Places subject to constant vibration or impact.
IMPORTANT–Observe the following to prevent fire, injury to people, malfunction, or damage to the equipment.
★ Do not open the LEM equipment except for wiring. Ask qualified personnel.
★ Do not change or modify LEM.
★ Keep moisture away from unit and AC cord.
★ Keep all DC wiring at least 30cm, 20" away from AC wiring, fluorescent lighting, or dimmer switches. Cross AC wiring
at a 90° angle.
★ Keep AC cord (power supply) and DC wiring from being pulled or crushed.
★ LEM is not operable during a power failure.
★ In areas where broadcasting station antennas are close by, intercom system may be affected by radio frequency
interference.
★ Make sure wires are connected properly before plugging in DC power supply.
★ Severe weather conditions, such as lightning storms, may cause damage to LEM equipment. We recommend that
power surge protection be installed as follows: (However, this does not guarantee that no damage will occur.
• If the power supply has a GROUND
terminal, take it to an earth ground.
In this case, a separate surge
arrester is not necessary.
• When using a power supply that
has no GROUND terminal, install a
surge arrester near the output as
shown.
Before actually mounting the LEM equipment, the contents of this Manual must be thoroughly read and understood.
4
4
4
4
WIRING
Actual terminal locations
LEM-1
+
–
E
1
Install a surge-arrester( discharging
voltage: 100∼180V) at a point
close to the output, taken to earth
ground.
LEM-3
+
–
E
1
2
3
– 2 –
LEM
PS-6D or SKK-620
Red (+)
+
-
White or Black(-)
Surge-arrester
(Aiphone model:SA-1)
Grounded
+, – : 6V DC power supply
E:
Common communication
1 ~ 3: Sub 1 ~ 3 calling and communication
6V DC
Advertisement
