Inside the display system
378
1SVC 440 795 M1100
Expanding the display
system
The display system can be expanded locally with the
CL-LER.18AC2, CL-LER.18DC2, CL-LET.20DC2, CL-LER.2O
expansion units or remotely via the CL-LEC.CI000 coupler
unit.
Install the units and connect the inputs and outputs as
described (a section “Connecting the expansion device”,
page 46).
You process the inputs of the expansion devices as contacts
in the display system circuit diagram in the same way as you
process the inputs of the basic unit. The input contacts are
assigned the operand identifiers R1 to R12.
R15 and R16 are the group fault alarms of the transistor
expansion unit (a section “Monitoring of short-circuit/
overload with CL-LST, CL-LMT and CL-LET”, page 376).
The outputs are processed as relay coils or contacts like the
outputs of the display system. The output relays are S1 to S8.
How is an expansion unit recognised?
If at least one
R… contact or contact/coil S … is used in the
circuit diagram, the basic unit assumes that an expansion
unit is connected.
h
CL-LER.18AC2 and CL-LER.18DC2 are provided with the
outputs S1 to S6. The other outputs S7, S8 can be used
internally.
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