INTRODUCTION
I-E96-418A
4 - 1
SECTION 4 - REPAIR/REPLACEMENT PROCEDURES
INTRODUCTION
Repair procedures are limited to termination unit (TU) replace-
ment. If the TPL fails, remove it and replace it with another
one.
TERMINATION UNIT REPLACEMENT
If you determine that the TPL is faulty, replace it with a new
one.
Do not
try to repair the module; replacing components
may affect the module performance and certification.
NOTE: Turn off power to the cabinet before removing the +24 VDC
and ground connection to the TPL.
Follow Steps 1 through 8 to replace the TPL termination unit.
1. Verify that the cabinet power is off, then disconnect the +24
VDC and ground wiring from E1 and E2 on the termination
unit.
2. Mark and disconnect the twinaxial cable from the termina-
tion unit.
3. Mark and disconnect the termination unit cable from the
P1 socket on the termination unit.
4. Remove and save the screws that secure that termination
unit to the field termination panel, and the chassis ground
screw with star washer.
CAUTION
When removing and replacing an NTPL01, all loop communica-
tion is lost while the termination unit is removed from the loop.
ATTENTION
Durant le demontage ou le remplacement d'une carte NTPL01,
toute communication avec le reseau est interrompue et ce pen-
dant tout le temps ou la carte est retiree de reseau.
CAUTION
Remove modules from their module mounting unit slots before
installing or removing a cable assigned to that slot. Failure to
do so could result in damage to the module.
ATTENTION
Retirer le module de son emplacement dans le chassis de
montage des modules avant d'installer ou de retirer un cable
assigne a cet emplacement. Un manquement a cette procedure
pourrait endommager le module.
