Nitsuko 24i/28i/124i/384i Hardware Manual

1. Installing Cabinets
1-6
Removing the Back Cover (Figure 1-4)
The back cover needs to be removed when installing an
Expansion Cabinet.
1. Remove the Main Cabinet back panel.  Refer to steps 1, 2,
and 3.
Figure 1-4  REMOVING THE BACK COVER
Securing the System to a wall (Figure 1-5)
1. Install wall brackets on the top corners of the Main Cabinet.
Note:Wall brackets are located on the side and bracket retain-
ing screws are located on the back of the Main Cabinet.
Figure 1-5  INSTALLING WALL BRACKETS...

1. Installing Cabinets1-7
Securing the Main Cabinet (Figure 1-6)
1. Secure the Main Cabinet to a wall using appropriate
hardware.
Note:If an Expansion Cabinet is required, do not secure
the Main Cabinet to the wall at this time.
Figure 1-6  SECURING THE MAIN CABINET
TO A WALL
Grounding the Main Cabinet (Figure 1-7)
1. Strap the SG (signal ground) lug to the FG (frame ground)
lug using 14 AWG.
2. Strap the PBXG (CO/PBX ground start trunk ground) lug to
the ETH (earth ground) lug using 14 AWG.
3. Strap the...

1. Installing Cabinets
1-8
Installing/Removing the Power Supply 
(Figures 1-8 and 1-9)
The Power Supply is factory-installed to the right of PCB slot 7
in the Main Cabinet. Four screws secure the power supply to
the Main Cabinet. Enclosed with the Power Supply:

1 3-stranded power cable (BLK-WHT-GRN)


1 6.3 amp 250 volt spare fuse
Figure 1-8  MAIN CABINET POWER SUPPLYTo install/replace the Power Supply:
1. Unplug AC power cable from the AC receptacle.  Remove
AC ring generator cable, if installed.
2....

1. Installing Cabinets1-9
Installing Main Cabinet Power Supply Cables
(Figure 1-10)
1. Unplug AC power cord, if necessary.
2. Plug in the red 9-conductor power cable connected from the
Main Cabinet backplane connectors CN1 and CN2 to the
Main Cabinet Power Supply OUTPUT connector.
3. Insert the Main Cabinet Power Supplys 3-pin to 4-pin cable
(BLK,WHT,GRN) through the tie wrap on the right side of
the Main Cabinet.  The 3-pin cable installs to the right.
4. Plug in the Main Cabinet Power Cables...

1. Installing Cabinets
1-10 An Expansion Cabinet is shipped fully assembled.  The
Expansion Cabinet uses the top cover of the Main Cabinet.
The following is shipped with an Expansion Cabinet:


1 Expansion Cabinet Power Supply DC power cable
(RED/BLU)


1 Expansion Cabinet Power Supply AC power cable
(BLU/BRN/YEL/GRN)


2 ferrite beads


2 wall brackets


2 spare fuses For the Expansion Cabinet
Power Supply


3 tie wraps
Before Installing an Expansion Cabinet
1. Power down the Main Cabinet.
2. Remove the...

1. Installing Cabinets1-11 Figure 1-11  INSTALLING AN EXPANSION CABINETFigure 1-12  INSTALLING RETAINING BRACKETS
(DETAIL A)
92000 - 36
92000 - 35
(See Detail A)
(See Detail C) (See Detail D) (See Detail B)
INSTALLING AN EXPANSION CABINET 

1. Installing Cabinets
1-12
Grounding an Expansion Cabinet 
(Figures 1-13 and 1-14)
1. Route the ground wire from the back of the cabinet out 
through the front.
Figure 1-13  ROUTING THE GROUND WIRE
(DETAIL C)2. Connect the Expansion Cabinet ground wire to the ground lug on
the front of the Main Cabinet.
Figure 1-14  CONNECTING TO THE GROUND LUG
(DETAIL D)
92000 - 119
DETAIL D
E
DETAIL C
92000 - 37
INSTALLING AN EXPANSION CABINET 

1. Installing Cabinets1-13
Connecting Expansion Cabinet Filter Cables
(Figure 1-15)
1. Loosen packing from filter cables.  Remove filter units (if
necessary).
2. Connect filter cables from the Expansion Cabinet to the Main
Cabinet with the red wire installed at the top of the connector.
Note:Filter cable connectors have push-in tabs to eject the fil-
ter cable if it becomes necessary to remove the filter cables.
Figure 1-15  FILTER CABLING THE CABINETS
(DETAIL B)
92000 - 39
CN7
CN8CN9
CN10
DETAIL B
CN7/9...

1. Installing Cabinets
1-14
INSTALLING AN EXPANSION CABINET
Installing the Expansion Cabinet Power Supply
(Figure 1-16)
The Expansion Cabinet Power Supply is installed to the right of
PCB slot 16/25 in an Expansion Cabinet.  The four screws used
to secure the power supply are factory-installed on the
Expansion Cabinet.
The following are enclosed with the Expansion Cabinet Power
Supply:

1 3-stranded power cable (BLK-WHT-GRN)


1 6.3 amp 250 volt spare fuse
To install/replace the Expansion Cabinet Power...

1. Installing Cabinets1-15
Installing Expansion Cabinet Power Supply
Cables (Figure 1-17)
Note:Remove the Main Cabinets AC power cord from the AC
receptacle.
1. Plug in the red 9-conductor power cable connected from the
Expansion Cabinet backplane connectors CN1 and CN2 to
the power supply OUTPUT connector.
2. Insert the Expansion Cabinet Power Supplys 3-pin to 3-pin
cable (BLK, WHT, GRN) through the tie wrap on the right
side of the Expansion Cabinet.
3. Plug in the Expansion Cabinet power cables 3-pin...