Atlas KXD 500 Service manual
KDX-500 INSTALLATION
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Site Requirements
The selection of a suitable location is essential when installing the key service unit (KSU). The
area should be clean, dry, static-free, temperature controlled, and accessible only to authorized
personnel. When selecting a site, give careful consideration to the following:
♦ Ample space must be allowed to mount the cabinet(s) and MDF (Main Distribution Frame)
and to allow for removal of the KSU covers to access assemblies and cards within the
cabinet(s).
♦ A well-ventilated and well-lighted area having with a temperature range of 32-100° F (0-40°
C) and 10%-90% relative, noncondensing humidity. The area must not be exposed to direct
sunlight, heat or dust. Optimal temperature range is 40-70° F.
♦ A dedicated 110/220 Volt AC, 15 Amp, 50/60 Hz, single phase, 3 wire, parallel blade with
ground power outlet should be located within 6 feet of the KSU. Additional outlets for music
source, paging amplifier, etc. as needed. The AC receptacles must be third-wire grounding
type. The third-wire ground must be connected to an approved earth ground through the
single-point grounding circuit at the power distribution panel.
♦ Avoid areas that produce radio frequency interference (RFI) or electro-magnetic interference
(EMI). (eg. electric welding equipment, radio frequency transmitters, magnets, refrigerators,
copy machines, microwave ovens, etc.)
♦ Locate the KSU and stations so as to minimize cable length. All station cables must be 2-pair
twisted-pair cable and must be home run. The Digital Keyphone may be wired differently.
Cabling lengths must not exceed the following:
Analog Keyphones: Diameter
26 gauge 460 feet
24 gauge 750 feet
22 gauge 1150 feet
Single-Line Telephones: 800 ohms using 22 gauge – 5000 feet
Digital Keyphone 24 gauge 600-3000 feet depending upon wiring configuration.
(See Fig. 22)
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♦ The CO/PBX line terminations should be within 5 feet of the cabinet/main distribution frame.
♦ Make sure there is a good earth ground utilizing #12 AWG or larger standard, copper wire
within 25 feet of the KSU. A metallic COLD water pipe usually provides a reliable ground
path. Carefully check that the pipe does not contain insulated joints that could isolate the
ground. (The pipe must be metallic from the point of ground to the connection to the water
main outside the building).
♦ Recommended: use a surge/spike protector.
AC: Innovative Technology Equalizer II or equivalent.
CO: Innovative Technology MDF 6/12/24 or equivalent.
KDX-500
The KDX-500 system consists of up to 4 cabinets. One Main KSU cabinet (with 3 slots for the
3 common control cards and 5 slots for peripheral cards) and up to 3 Expansion KSU cabinets
(each with 8 slots for peripheral cards).
The current peripheral cards are:
♦ COU-A Analog loop start trunks (8 circuits)
♦ STU-A Analog Keyphone stations (8 circuits)
♦ DSU-16 Digital Keyphone stations (16 circuits)
♦ SLU-16 Analog Single Line telephones (16 circuits)
Future peripheral cards are:
♦ T-1 / PRI Trunk card
♦ BRI card
♦ DID / Caller ID Card
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Expansion KSU
Main KSU
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INSTALLATION
The KXD-500 KSU can be installed “free-standing” or wall mounted. For wall mounting remove
the two screws on the front of the cabinet securing the top. Lift up the top panel from the front
and remove it. Remove the two “L” brackets (each secured by two screws) and reinstall them
as shown in Fig. 1.
Fig. 1
When wall mounting, a ¾” thick plywood backboard should be attached to the equipment room
wall for mounting the cabinet(s) and associated equipment. The backboard should be large
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enough to allow sufficient space for the MDF connecting blocks and optional equipment to be
mounted and serviced conveniently.
POWER TRANSFORMER ASSEMBLY
Once the cabinet is in place, install the KDX-ACPU-A1 Power Transformer Assembly (see Fig. 2)
into the main KSU. The cables from this assembly plug into the PSU-A Unit. (See Fig. 3)
• Remove cover plate on left side of KSU
• Place power assembly in cabinet. Secure with two screws provided
• Connect CN7 on Power Assembly to CN6 on PSU-A Unit (2 blue wires)
• Connect 2 yellow wires from large power transformer to CN3 on PSU-A Unit
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• Connect 8-wire connector from Ringing Transformer to CN4 on PSU-A Unit
Fig. 2
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Fig. 3
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FUSES (PSU-A UNIT) (See Fig. 3)
LED INDICATION FUSE
n
n
n
n
n
n
n
Steady Green
Steady Red F2 3A 250V
Steady Red F3 1A 250V
Steady Red F1 3A 250V
Steady Red F6 6A 250V
Steady Red F4 .5A 250V
Very Fast Flashing Red F5 .5A 250V
Note: 1) An unlit LED indicates a blown fuse. Be sure to replace the fuse with the same type
and rating.
2) Fuse F7 (6A / 250V) is for the built in trickle charger for external batteries that may be
attached to the BATU Unit. There is no LED Monitoring this fuse.
BATU UNIT
The BATU Unit provides the capability to connect external batteries to the system to provide
for complete system operation in the event of local power failure. Attach batteries
( 24VDC ) to the BATU Unit at the appropriate terminals. (See Fig. 4) The system applies a
trickle charge to the battery when it is not in use.
Keep the battery(s) dry and clean. Avoid damp wet areas or areas where the battery may
be easily damaged. Wires should run from the battery(s) to the terminals on the BATU
Unit. When connecting to the BATU, pay particular attention to matching the positive and
negative connections. Improper connection will damage the power supply. When operating
from the battery, the system will automatically cut off the power supply from the battery
when the voltage gets too low, so that the battery can be recharged.
CAUTION!!!! To reduce the risk of fire or injury please note the following:
Do not dispose of the battery(s) in a fire. The cell may explode. Check with local
codes for special disposal instructions.
Do not open or mutilate the battery(s). Released electrolyte is corrosive and may
cause damage to the eyes or skin. It may be toxic if swallowed.
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Exercise care in handling the battery(s) in order not to short the battery with
conducting materials such as rings, bracelets and keys. The battery may overheat
and cause burns.
Observe proper polarity orientation between the battery(s) and BATU Unit.
Do not mix battery(s) of different sizes or from different manufacturers in this product.
The length of time system operation is maintained under battery power depends on battery
capacity. Typical system support for the 24 Volt battery(s) is approximately one hour.
Fig. 4
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COMMON CONTROL CARDS
See Fig. 5 for card locations. Slots labeled FPU are for Peripheral Cards (Stations /
Trunks). The 3 Common Control Cards are 1) CCU-A Card (Central Processor), 2) SSU-A
Card (System Services Card) and 3) SMDRU Card (SMDR and Serial Ports).
Main KSU Layout
Main KSU Backplane
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Expansion KSU Backplane
CCU-A CARD (CENTRAL PROCESSOR)
Fig. 5
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The CCU Card is the main controller for the system. There are 4 LED’s on the card:
LED 1 (Very Fast Flashing Green)
LED 2/3 (Alternating Slow Flashing Red)
LED 4 (Red)
Controlled by Switch 1 (Battery). Turning switch ON activates the
battery (LED 4 lit steady)
Fig. 6
SNU-A CARD (SYSTEM SERVICES CARD)
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The SNU Card provides the common service features for the system. There are 2 LED’s on
the card:
LED 1 (Slow Flashing Red)
LED 2 (Steady Red)
Jumper J1 should be set to the U-LAW position. A-LAW setting is for Europe
Fig. 7
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ESNC CARD (EXPANSION SWITCHING NETWORK CARD)
The ESNC Card is required when the 2
nd
and 3rd expansion cabinets are used. It adds the
additional 256 X 256 switching channel array required for these cabinets. The ESNC Card
is plugged into CN4 on the SSU Card and secured with the screws provided.
Fig. 8
Fig. 9
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SMDR CARD
The SMDR Card provides for 1 Parallel Port connection (CN7) on the MDF-F1 (see Fig. 14).
This provides interface for a standard parallel printer (SMDR). This card also provides for 4
RS-232 connections to specific external devices. These connections are made through 4
DB-9 connectors on the MDF-F1 card located on the right side of the main KSU. The 4
ports are assigned as follows:
Port 1 (CN8) is for PC Programming (Future Feature)
Port 2 (CN9) is for Call Records & Reporting (SMDR)
Port 3 (CN10) is for Voice Mail Interface (SMDI)
Port 4 (CN11) is for InnFone Integration
There are 6 LED’s on the SMDR Card:
LED 1 (Fast Flashing Green)
LED 2-5 (Red) These flash whenever data is transmitted through CN8 - CN11
LED 6 (Red) Controlled by Switch 1 (Battery). Turning switch ON activates the
battery (LED 6 lit steady)
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