User guide

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Step 2. Turn off power to the rack.
Step 3. Disconnect the drop cable from the module faceplate.
Step 4. Use a screwdriver to loosen the screws that hold the
module in the rack. Take the module out of the slot in the
rack.
Step 5. Take the replacement module out of its shipping container.
Take it out of the antiĆstatic bag, being careful not to touch
the connectors on the back of the module.
Step 6. Insert the replacement module into the rack, making sure
it is wellĆseated in the rack.
Step 7. Set the drop number of the module by using the two
thumbwheel switches on the module faceplate. The upper
switch is the most significant digit; the lower switch is the
least significant digit.
Step 8. Attach the drop cable to the module faceplate.
Step 9. Turn on power to the rack.
Step 10. Monitor status registers 15Ć18 in the drop 0 area in each
module using the Status command described in chapter
5. If the values in these registers increase consistently over
a short period of time, there is a communication problem.
Refer to chapter 6 for instructions on troubleshooting a
communication problem.
3.6.2 Replacing the Shark Interface Module
(M/N 57C554)
Use the following procedure to replace a module:
DANGER
THIS EQUIPMENT IS AT LINE VOLTAGE WHEN AĆC POWER IS CONNECTED.
DISCONNECT AND LOCK OUT ALL UNGROUNDED CONDUCTORS OF THE AĆC
POWER LINE. FAILURE TO OBSERVE THESE PRECAUTIONS COULD RESULT
IN SEVERE BODILY INJURY OR LOSS OF LIFE.
Step 1. Turn off power to the rack and all external devices.
Step 2. Turn off power to the Shark rack including any power to
the wiring leading to the rack.
Step 3. Disconnect the drop cable from the Shark Interface
module's faceplate.
Step 4. Remove the module from the rack.
Step 5. Take the replacement module out of its shipping container.
Be careful not to touch the connectors on the back of the
module.
Step 6. Insert the replacement module into the rack. Be sure the
module is wellĆseated in the rack.
Step 7. Set the drop number of the module using the 16Ćposition
rotary switch on the module faceplate.
Step 8. Connect the drop cable to the 9Ćpin connector on the
module faceplate.