ABB Relion REX610, Manual

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GUID-9C3524CC-091F-4333-A707-FAC0A835C1ED V5 EN-US
Figure 2: Distribution substation example
3.2 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 Default state Description
A2 RJ-45 Open Ethernet station bus
A2 RS-485 Closed Serial station bus
Front port USB Closed Service access
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
Section 3
2NGA000818 A
Secure system setup
10 REX610
Cyber Security Deployment Guideline