408-8734 Datasheet, PDF (5/6 Pages) TE Connectivity Ltd – Terminating Modules

408-8734
CAUTION
Removing the cable assembly before a tone has sounded may cause good terminations to test as failures.
NOTE
Any coupled cable assembly may be tested or re-tested by inserting and latching the modular plugs into the nest areas and
pressing the TEST pushbutton.
For terminator -3, hold the cable assembly release down, and remove the cable assembly from the
module.
TESTING SUMMARY (Terminators -1 and -2 Only)
1:1/1:N ORIENTATION
TEST
CONDITION
TEST INDICATORS
The tester checks for open conductors.
There are one or more open conductors.
A long tone will sound and the OPEN LED will
light. The wire position LEDs will also light,
corresponding to the open conductors of the
plug located in the right-hand nest. Note that if
“opens” are found, the tester abandons further
testing; therefore, shorts that may have also
been present will not be indicated.
If there are no open conductors, the tester The cable assembly has two or more
checks for short circuits.
shorted conductors.
A long tone will sound and the SHORT LED
will light. The wire position LEDs will also light,
corresponding to the shorted conductors of
the plug located in the right-hand nest.
No “opens” or “shorts” are found.
The cable assembly is considered good.
The tester will sound a short tone and the
GOOD LED will light.
CROSSED CONDUCTORS
TEST
CONDITION
TEST INDICATORS
With the position selector switch in the Learn
position, the tester compares the cable
assembly against a “learned” cable pattern.
When a cable assembly has a “learned”
cable pattern, open conductors, as well as,
crossed conductors, are noted.
Contacts that were “learned” as “open” are
found to have continuity to other conductors
in the cable assembly.
The tester will sound a long tone, light both
the OPEN and SHORT LEDs, and light the
wire position LEDs corresponding to the
connected conductors of the plug located in
the right-hand side of the nest.
If there are no connections where there
The cable assembly has one or more open
should be “opens”, the tester will conduct the conductors.
“opens” test.
The tester will sound a long tone, the OPEN
LED will light, and the wire position LEDs will
light, corresponding to the open conductors of
the plug located in the right-hand side of the
nest.
If there are no opens present, the tester
performs the “shorts” test.
The cable assembly has two or more
shorted conductors.
The tester will sound a long tone, the SHORT
LED will light, and the wire position LEDs will
light, corresponding to the open conductors of
the plug located in the right-hand side of the
nest.
The cable assembly passes all three tests. The cable assembly is considered good.
Tester will sound a short tone and GOOD LED
will light.
Figure 5
5. Inspect the crimps on the modular plugs using an indicator with a 0.25-mm [.010-in.] diameter needle-
point probe. Refer to the application specification (given Section 3) for crimp height and other
terminated modular plug criteria.
Problems associated with bad cable assemblies should be recorded to aid in troubleshooting. Check
for the source of recurring problems in the following order:
a. Check the settings against the test cable.
Rev E
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