9 Troubleshooting PROline Promag 53
112 Endress+Hauser
9.7
Removing and installing printed circuit boards
Field housing: removing and installing printed circuit boards (Fig. 54)
#
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!
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, 7):
Insert a thin pin into the hole (3) provided for the purpose and pull the board clear
of its holder.
5. Remove submodules (6.2):
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
(see Page 54). The individual slots are marked and correspond to certain terminals
in the connection compartment of the transmitter:
“INPUT / OUTPUT 2” slot = terminals 24 / 25
“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.
– Disconnect the plug of the coil current cable (5.2) from the board.
– 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.
"
Caution:
Use only original Endress+Hauser parts.
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