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MERLIN LEGEND Communications System Release 7.0
Pocket Reference
555-670-116
Issue 1
April 1999
34
Environmental Specifications
Backboard Mounting Hardware Requirements
This refers to the types of wall construction to which the backboard
will be attached.
Hardware has a combined pullout force of 650 lb. (294.8 kg). When
mounting to sheet-metal walls, attach to structural members.
Location
Within 5 feet (1.5 m) of dedicated AC power outlet (1 plug per
carrier).
Within 1000 cable feet (304.8 m) of telephones.
Heat Dissipation
Fully loaded basic carrier 500 Btu/hr (35 cal/sec)
Fully loaded 2-carrier system 1000 Btu/hr (70 cal/sec)
(basic carrier with one expansion carrier)
Fully loaded 3-carrier system 1500 Btu/hr (105 cal/sec)
(basic carrier plus two expansion carriers)
Power Requirements
Basic carrier 117 VAC 60 Hz -15% to 10% 5.4A
2-carrier 117 VAC 60 Hz -15% to 10% 10.8A
3-carrier 117 VAC 60 Hz -15% to 10% 16.2A
Temperature/Humidity Range
40°–104°F (4°–40°C)
20%-80% relative humidity
Ventilation Clearances
1 inch (2.5 cm) on right and left sides
Radio Frequency Interference, Tolerance
1.0 V/m
Electromagnetic Interference (EMI)
To reduce electromagnetic interference emissions (possible
interference problems with handheld telephones), check the date of
manufacture of the CPU (517A27) units. If they were manufactured
before April, 1993, replace them with a later version.
CAUTION:
!
■ For the control unit, do not use an AC outlet that is controlled
by a wall switch or some other switch.
■ Use an approved ground (AC receptacle for 3-prong plug).
■ Do not install the control unit outdoors.
■ Do not place the control unit near extreme heat (furnaces,
heaters, attics, or direct sunlight).
■ Do not expose the control unit to devices that generate
electrical interference (such as arc welders or motors).
Type of material Mounting Hardware
Wood surface Wood screws
Concrete surface, brick, cinder block Masonry anchors
Plaster, plasterboard Toggle bolts
Sheet-metal surface Sheet-metal screws