Troubleshooting Promag 53 PROFIBUS DP/PA
148 Endress+Hauser
9.6.3 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.
• When connecting Ex-certified devices, see the notes and diagrams in the Ex-specific
supplement to this Operating Manual.
"
Caution!
Use only original Endress+Hauser parts.
Installing and removing the circuit boards → 70:
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 (3) provided for the purpose and pull the board clear of
its holder.
5. Removing sub-modules (6.2, only for measuring devices with convertible I/O board):
No tools are required for removing the submodules (inputs/outputs) from the I/O
board. Installation is also a no-tools operation.
"
Caution!
Only certain combinations of submodules on the
I/O board are permissible. → 55
The individual slots are marked and correspond to certain terminals in the connection
compartment of the transmitter:
– "INPUT / OUTPUT 3" slot = terminals 22/23
– "INPUT / OUTPUT 4" slot = terminals 20/21
6. 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 back and forward.
– Insert a thin pin into the hole (3) provided for the purpose and pull the board clear of
its holder.
7. Installation is the reverse of the removal procedure.
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