Specifications

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DX-120 Installation and Maintenance Manual INSTALLING THE DX-120
Adding an APM4 (continued)
INSTALLING THE APM4 IN KSU2
1) Be sure that the entire system is turned off.
2) Remove the KSU2 cover (four screws at each corner).
3) Install a static discharge wrist strap on your bare wrist, and adjust it for a snug fit.
CAUTION
Be sure that the strap is touching bare skin and is not isolated by clothing.
4) Connect the wrist strap cord between the wrist strap and an AC or earth ground.
5) Connect a static discharge wrist strap to a suitable earth ground.
CAUTION
Circuit boards are susceptible to damage caused by electrostatic
discharge. You must keep this in mind as you handle the circuit boards.
For additional information, see Vertical publication IMI01-005, Handling of
Electrostatically Sensitive Components.
6) Remove the APM4 module from the packaging and locate the four nickel-color standoffs packaged
with the module.
7) Position the APM4 over the left-hand side of the KSU2 408M/E and any other extension modules
already installed.
NOTE
In the KSU2, extension modules are always installed on the left-hand side.
8) Use the four nickel-color standoffs supplied with the APM4 to secure the APM4 in position.
9) Connect the dedicated APM4 ribbon cable from the 408E to the APM4 module.
IMPORTANT!
Do not use any other connector other than the dedicated cable as provided.
HINT
Press firmly (but not forcefully) on the connector to secure a good connection.
10) Make cable/wiring connections to the 4 analog ports as required.
CAUTION
The FCC requires that wiring of CO lines into a KSU be separated from
wiring of station apparatus into a KSU. Therefore you must use separate
cables for wiring stations and CO lines.
11) Replace the KSU2 cover and secure with cover screws.
12) Restore power.