FMC Corporation - Talstar 80 - Handbuch (Seite 81)

Proline Promass 80 PROFIBUS PA Troubleshooting
81
9.5.1 Removing and installing printed circuit boards
Field housing
#
Warning!
• Risk of electric shock. Exposed components carry dangerous voltages. Make sure that the power
supply is switched off before you remove the cover of the electronics compartment.
• Risk of damaging electronic components (ESD protection). Static electricity can damage electronic
components or impair their operability. Use a workplace with a grounded working surface
purpose-built for electrostatically sensitive devices!
• If you cannot guarantee that the dielectric strength of the device is maintained in the following
steps, then an appropriate inspection must be carried out in accordance with the manufacturer’s
specifications.
"
Caution!
Use only original FMC Technologies parts.
Fig. 38, installation and removal:
1. Unscrew cover of the electronics compartment from the transmitter housing.
2. Remove the local display (1) as follows:
– Press in the latches (1.1) at the side and remove the display module.
– Disconnect the ribbon cable (1.2) of the display module from the amplifier board.
3. Remove the screws and remove the cover (2) from the electronics compartment.
4. Remove power unit board (4) and I/O board (6):
Insert a thin pin into the hole provided (3) for the purpose and pull the board clear of its holder.
5. Remove amplifier board (5):
– Disconnect the plug of the sensor signal cable (5.1) including S-DAT (5.3) from the board.
– Gently disconnect the plug of the excitation current cable (5.2) from the board, i.e. without
moving it back and forth.
– Insert a thin pin into the hole provided (3) for the purpose and pull the board clear of its
holder.
6. Installation is the reverse of the removal procedure.