Vertical comdial DX-120, Installation And Maintenance Manual

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I
NSTALLING THE
DX-120
DX-120 Installation and Maintenance Manual
- 44 -
Preparing the Main Distribution Frame (continued)
KSU C
OMPONENTS AND
I
NSTALLATION
•
KSU1
-
one mounting template
-
standard 408M (module) equipped with eight digital extension ports, four CO line ports, and one CO line
PFT (Power Failure Transfer) port
-
standard CPM
-
standard APM4
-
system installation, maintenance, and programming manuals and system installation quick reference
guide.
•
KSU2
-
one mounting template
-
standard expansion cabinet 408E (module) equipped with 8 digital extension ports, four CO line ports,
and one CO line PFT port.
IMPORTANT!
Open the cartons and verify that all items are complete and undamaged.
Remove all packing material and store for future use in the event that return
shipment is required.
M
OUNTING THE
KSU
1) Select a suitable location for the KSU1 considering that the expansion (KSU2) may be installed at the
same time or sometime in the future.
• KSU1 and KSU2 may be mounted such that they are side-by-side or mounted one above the other.
2) Using the mounting template as a guide, mark the two mounting screws locations on the MDF
backboard.
3) Pre-drill two screw holes and install the two, pan-head No. 10 screws (supplied) into the backboard
with a regular screwdriver.
• The screw heads should protrude about 1/4-inch from the backboard plywood surface.
4) Lift the KSU over the two screws, allowing the screws to extend into the KSU slotted mounting holes.
• As the KSU is allowed to rest in place on the mounting screws it will slip over the screw shanks until
the top of the slot is reached.
• Properly installed, the KSU power transformer (where the KSU AC power cord is located) is
positioned in the upper left corner.
• The power switch and power/heartbeat LED are positioned at the left side of the KSU toward the
bottom.
CAUTION
It is very important that you mount the KSU correctly to allow proper power supply heat
dissipation. KSU1 and KSU2 must be wall mounted only in order to prevent the build up of
heat in and around the system.
Mounting the KSU (continued on next page)