Comtech EF Data SDM-9220 - Manual (Page 71)

Hardware Installation
Memotec Inc. 4-29
WARNING:
:
If at a later time you need to remove the unit cover or access
internal components, turn OFF the unit and disconnect it from its power source
to avoid electrical shock and damage to the unit.
SDM-9220 DC or SDM-9230 DC Unit
CAUTION:
: Connection of the -48 VDC unit to its power source
must be carried out by a qualified electrical technician only.
WARNING:
:
A 20A circuit breaker must be provided as part of the building
installation for the -48VDC power connection.
A removable wiring harness is supplied with the unit:
• Harness and triple wire cable
• 2 m. (approx. 6 feet) long.
To connect a -48 VDC unit to its power source:
1. Turn off the circuit breakers to the -48 volt DC power supply.
WARNING:
:
To avoid electrical shock and possible damage to the unit, ensure
that the -48 VDC power supply is shut OFF before you connect the SDM-
9230 DC unit.
2. Ensure that all interface cards are fully inserted into their slots and securely screwed
into place.
Figure 4-13: Harness and Wire for SDM-9220 DC or SDM-9230 DC Power Connection
Plastic
connector Strip terminations Green/yellow:
Mechanical ground Black: -48 VDC
live wire White: Electric ground
(0 volt RTN)