IEC10000229 V1 EN-US
Figure 15: Selection of LDCM for analog or binary signal transfer
4.3 Configuration of analog signals
M12022-86 v5
Currents from the local end enter the IED as analog values via the Analog input
modules. These currents are converted to digital values and then forwarded to the
line differential protection function in the local IED. From there, they are
transmitted to remote IEDs via a Line differential communication module
(LDCM). Currents coming from a remote IED are received as digital values via
local IED's LDCM, and they are then forwarded to the protection function in the
local IED.
LDLPSCH acts as the interface to and from the protection function.
Configuration of this data flow is made in the SMT tool as shown in Figure
16.
1MRK 505 382-UEN B Section 4
Analog and binary signal transfer for line differential protection
Communication set-up 670/650 series 2.2 29
Application Guide
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