Removing And Installing Printed Circuit Boards - Endress+Hauser Proline Promass 84 MODBUS RS485 Operating Instructions Manual

Proline Promass 84 MODBUS RS485
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Endress+Hauser
10.6.1

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 purposely built for electrostatically sensitive devices!
• If you cannot guarantee that the dielectric strength of the measuring instrument 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 Endress+Hauser parts.
Installing and removing printed circuit boards → å 47:
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. Remove submodules (6.1) (optional):
No tools are required for removing the submodules (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 → ä 27.
The individual slots are marked and correspond to certain terminals in the connection
compartment of the transmitter:
– Slot "INPUT / OUTPUT 3" = Terminals 22/23
– Slot "INPUT/OUTPUT 4" = Terminals 20/21
6. 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 exciting current cable (5.2) from the board, i.e. without
moving it back and forth.
– 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.
Troubleshooting
87