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DR. JOHANNES
HEIDENHAN
GmbH
D-8225Traunreut.Tel.(O8669)31-0
SERVICE MANUAL TNC 155
Pax
39
Kundendienst
Se&ion
3.1.3
3.1.3
Procedure
for
exchanaincr
the PLC I/O Board
1.
2.
3.
4.
5.
6.
7.
of the PL 100 B/110 e
-
Remove the fixing
screws of the heatsink
cover-plate.
Re!nove the heatsink
cover-plate.
Disconnect
the TNC 155 connecting
cable.
Disconnect
connector
strips
Jl-J9,
using
a screw driver
to psise
the connectors
apart.
(Do not unscrew individual
wires)
Remove the voltage
supply
(+24V and OV)
Remove the fixing
screws of the PL 100 B/110 B unit.
Install
the new unit
following
the above procedure
in
reverse
order.
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