Unpacking
Memotec Inc. 2-3
2.2 Selecting a Location
To ensure that the SDM-9XXX Series unit functions properly, you should install the unit in
an appropriate location which satisfies certain criteria for size, connection distance and
ambient environment.
Size
Requirements
• Select a standard 19" (48 cm) equipment rack or a hard, flat surface that is:
- Near an easily accessible AC power source (or possibly DC as required).
- Capable of supporting the weight and size of the SDM-9XXX Series unit, its
cabling and attached equipment.
• To ensure proper ventilation of the SDM-9XXX Series unit, leave 5 cm (2 inches)
of unobstructed space around the unit chassis.
• Ensure that a sufficient number of shelves, supports, racks and cabinets are
available to safely house all equipment.
Distance
Requirements
• The SDM-9XXX Series unit should be no more than 2 meters (approx. 6 feet)
away from an easily accessible power supply appropriate to the type of power
supply on the unit:
- SDM-9120 UAC, SDM-9220 UAC or SDM-9230 UAC: 100-240 VAC, (50/60
Hz)
- The maximum length of user equipment connections is relative to the serial
(WAN/user) port speed:
- 6 Mbps: 8 meters (25 feet)
- 2 Mbps or less: 30 meters (100 feet)
• There should be no more than 8 meters (25 feet) between modems and WAN link
(PVCR) connections.
Caution
Unit must be installed in a restricted access location.
Warning
In countries where a 2-pin non-grounded power cord must be used for
the SDM-9XXX Series UAC, ensure that the unit is independently
grounded with a wire from Ground securely attached to the ground lug
on the power supply at the rear of the unit chassis.
For the location of the ground lug, refer to:
“Rear View of the SDM-9120” on page 4-3 or
“Rear View of the SDM-9220/9230 UAC” on page 4-5 or
“Rear View of the SDM-9140 with UAC Power Supply Options” on
page 4-8 or
“Rear View of the SDM-9140 with -48VDC Power Supply Options” on
page 4-9
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