ABB RED650, Applications Manual

Page: 372 / 454

Engineering
Workstation
Computer HMI
Firewall
VPN
Gateway
Network Control Center Maintenance Center
AFS 6xx
AFS 6xx
AFS 6xx
AFS 6xx
SAM600 SAM600 SAM600
IEC 6185 0
FOX615
WAMS SDM600
IET600 PCM600 ITT600
NSD570
Events Printer
Printer
IEC18000011-1-en.vsdx
IEC18000011 V1 EN-US
Figure 150: Example of a station configuration with separated process bus and
station bus
The IED can get analog values simultaneously from a classical CT or VT and from
a Merging Unit, like in this example:
The merging units (MU) are called so because they can gather analog values from
one or more measuring transformers, sample the data and send the data over
process bus to other clients (or subscribers) in the system. Some merging units are
able to get data from classical measuring transformers, others from non-
conventional measuring transducers and yet others can pick up data from both
types. The electronic part of a non-conventional measuring transducer (like a
Rogowski coil or a capacitive divider) can represent a MU by itself as long as it
can send sampled data over process bus.
Section 18
1MRK 505 393-UEN B
Station communication
366 Line differential protection RED650 2.2 IEC
Application manual