Relay Communication Interfaces - ABB RELION REX610 Manual

Section 3
Secure system setup
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Figure 2: Distribution substation example
3.2
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Relay communication interfaces

Some physical ports dedicated for station bus communication can be opened and
closed in relay configuration. Few ports are always open as they are needed in
communication for monitoring, control and configuration. The front port is used
for engineering and it can be used only for point-to-point configuration access with
PCM600.
Table 1: Physical ports on relay's communication cards
Port ID Type
A2 RJ-45
A2 RS-485
Front port USB
Serial ports are closed by default and Ethernet ports are open. All protocol
instances, except for IEC 61850 and FTP, are by default off and do not respond to
protocol requests in serial or Ethernet ports. The IEC 61850 protocol and rear
Default state Description
Open Ethernet station bus
Closed Serial station bus
Closed Service access
Cyber Security Deployment Guideline
2NGA000818 A
REX610