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4. 1.
SEPARATING THE INNER AND OUTER-CHASSIS
It is recommended that the user of this equipment become acquainted with the infor-
mation in these instructions before energizing the REL 301/302 and associated as-
semblies. Failure to observe this precaution may result in damage to the equipment.
All integrated circuits used on the modules are sensitive to and can be damaged by the
discharge of static electricity. Electrostatic discharge precautions should be observed
when operating or testing the REL 301/302.
Use the following procedure when separating the inner
chassis from the outer chassis; failure to observe this pre-
caution can cause personal injury, undesired tripping of
outputs and component damage.
a.
Unscrew the front cover knob and remove cover.
b.
Open all FT switches completely.
!
WARNING
c.
Release frame latches by pushing the top and bottom latches inward towards the center of
the relay.
d.
The inner chassis removal lever is located on the left center (vertical mount) or on top cen-
ter (horizontal mount) of the inner chassis. Push the lever towards the middle tab on the
frame.
e.
Slide out the inner chassis.
f.
Reverse procedures above when replacing the inner chassis into the outer chassis.
4.2
TEST PLUGS AND FT SWITCHES
Test Plugs are available as accessories (Section 1.6.6). They are inserted into the FT-
10 switches for the purpose of System Function Tests.
4.3
EXTERNAL WIRING
All electrical inputs/outputs are made through the back of the REL 301/302. Figure
4-1 illustrates where the different input/output signals are located. The vertical REL
301/302 is used as a reference in the location column of the Connection Specification
Chart (similarly for the horizontal REL 301/302).
(10/94)
Section 4. INSTALLATION AND OPERATION
Do Not Touch the outer contacts of any FT-10 switch;
they may be energized.
!
CAUTION
I.L. 40-386.3
4-1
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