8.4.2
Dismantling of CPM 223
• Consider potential effects on process
when removing the instrument from service!
• First pull off the terminal block (item 422 b)
on the rear of the instrument to de-energize
the instrument.
• Then pull off the terminal blocks (items 422
a and 430 if applicable) on the rear. Now
you can dismantle the instrument.
• Push the end frame latches (item 340)
inward and pull off the frame towards the
rear.
• Loosen the special screw (item 400) by
turning it counterclockwise.
• Remove the complete electronics block
from the housing. The modules are
plugged together mechanically and can be
easily separated:
–
Simply pull the processor/display module
off towards the front
–
Pull the back plate tabs outward slightly
to remove the lateral modules.
• Removal of pH/mV transmitter (item 230):
–
Bend the screen plate upward
–
Pull off the stranded wire (plug-in
connection; pH input from BNC socket),
then pull off the module towards the top.
8.4.3
Assembly of CPM 223
• Reverse the dismantling sequence for
assembly.
• Hand-tighten the special screw without
using a tool.
• Incorrect assembly is not possible!
A module block which has been plugged
together incorrectly cannot be inserted in
the housing.
8.4.4
Spare parts for CPM 223
Item
Designation
Name
Function
Order number
10
Power supply unit
LSGA
100/115/230 V AC
51500317
20
Power supply unit
LSGD
24 V AC + DC
51500318
290
Relay module
LSR1-2
2 relays
51500320
300
Relay module
LSR1-4
4 relays
51500321
40
Central module
LSCH-S1
1 current output
51501081
40
Central module
LSCH-S2
2 current outputs
51501082
40
Central module
LSCH-H1
1 current HART
51501083
40
Central module
LSCH-H2
2 current HART
51501084
40
Central module
LSCP
Profibus PA/no current output!
51501085
230
pH/mV transmitter
MKP1
pH/mV + temperature input
51501080
235
pH/mV input
BNC screen plate
51501070
330, 400
Housing assembly
Housing with front
membrane, key tappets,
gasket, special screw,
tensioning brackets,
connection and nameplates
51501075
310, 320,
340, 400
Mechanical housing parts
Back plate, side wall, end
frame, special screw
51501076
422a, 422b
Terminal strip set
Terminal strips for inputs /
outputs and for supply / alarm
relay
51501077
430
Terminal strip
Terminal strip for relay module
51501078
435
BNC angle connector
pH/mV connection
50074961
PM253E08.CHP
Liquisys M CPM 223 / 253
Diagnosis and corrective maintenance
Hauser
61