1460/61 INSTRUCTION MANUAL
Page 16
III.) Rack Mount Unit (1461):
A.) Preparing the Equipment Rack:
1.) Pull all field wiring into the 19" rack or console. Be sure to allow adequate wire length for connection
to the external field terminals on the back of the 1461.
CAUTION: ELECTRIC SHOCK HAZARD! Ensure that NO electrical power is present on any wire
before installation.
2.) Prepare field wiring for connection to the 1461.
a.) Ensure that all field wiring is free of shorts and grounds.
b.) Dress the wires for connection to the external field terminals on the back of the 1461.
i.)
Ensure that no wire will be pinched or obstruct installation of the 1461 into the equipment
rack.
ii.) Route field wiring away from sharp projections, corners, and internal components.
NOTE: DO NOT CONNECT ANY WIRING AT THIS TIME.
B.) Giving the Unit a Bench Test
1.) Prior to installing the 1461, ensure that all necessary parts are included in the carton. Check all
items in the carton against the Parts Checklist.
CAUTION: ELECTRIC SHOCK HAZARD! Ensure that ALL sources of electrical power are disconnected
from the 1461 so that no accidental contact with energized parts can be made.
CAUTION: STATIC SENSITIVE DEVICES! Be sure to wear a static grounding wrist strap or similar
protective device when working inside of the 1461 chassis.
NOTE: If an optional 1464R, 1466, 1467, or 1468A module is to be added for the initial setup,
installation should be done at this time. Refer to the Installation Instructions included with the
module or in Appendix E of this manual.
2.) Prepare the 1461 for a bench test.
a.) Place the 1461 on a table or other work surface.
b.) Remove the four #6 X 3/8" sheet metal screws holding the top cover onto the chassis. Refer to
diagram on page 21. Save these four sheet metal screws.
c.) Carefully remove the top cover.
d.) Locate the circuit board assemblies of the 1461. The main board is mounted to the bottom of the
chassis. The CPU and display boards are mounted to the front of the chassis.
e.) Ensure that all cables inside the chassis are properly connected.
i.)
The six position cable is connected between J5 of the main board and J1 of the CPU board.
ii.) The twenty-four position cable is connected between J2 of the CPU board and J1 of the
display board.
f.) Connect wiring between the terminals of the main board and external field terminals to satisfy
your application. Refer to Appendices B and C for typical wiring diagrams for clock and signal
circuits.
INSTALLATION
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