PROline Promag 50 9Trouble-shooting
Endress+Hauser 97
9.7 Removing and installing printed circuit boards
Field housing: removing and installing printed circuit boards (Fig. 48)
#
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 dam-
age 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.
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 supply board and I/O board (4, 6):
Insert a suitable tool into the holes (3) provided for the purpose and pull the board
clear of its holder.
5. Remove amplifier board (5):
– Disconnect the plug of the electrode signal cable (5.1) including S-DAT (5.3) from
the board.
– Loosen the plug locking of the coil current cable (5.2) and gently disconnect the
plug from the board, i.e. without moving it to and fro.
– Insert a thin pin into the hole (3) provided for the purpose and pull the board clear
of its holder.
6. Installation is the reverse of the removal procedure.
" Caution!
Use only original Endress+Hauser parts.
To Next Page
Loading...
