ABB PM891K02 3BSE053242R1 AC 800M Controllers Redundant Processor Unit

FAQ

Q1: What is the maximum number of S800 I/O units supported per PM891 processor?
A1: Each PM891 can connect up to 7 clusters of S800 I/O units, with a maximum of 12 units per cluster.

Q2: Can the PM891K02 processor perform hot replacement?
A2: Hot replacement requires the BC810K02 unit, which must be ordered separately.

Q3: Are the Ethernet ports on the PM891 redundant?
A3: Yes, the PM891 has built-in redundant Ethernet communication ports.

Q4: Does the PM891 contain an internal battery?
A4: No, the PM891 does not include any internal battery.

Q5: What type of CPU redundancy does the PM891 support?
A5: It supports CPU, CEX-Bus, communication interfaces, and S800 I/O redundancy for high availability.

Q6: What is the purpose of the COM4 serial port?
A6: The isolated COM4 port is used exclusively for configuration tools.

Q7: What is the protection class of the PM891?
A7: The PM891 has IP20 protection, eliminating the need for additional enclosures.

Q8: How does the CEX-Bus interconnection enhance system availability?
A8: Using the BC810 unit, the CEX-Bus can be divided into separate segments, reducing fault propagation and increasing overall system availability.

3BSE053242R1 ABB AC 800M Controllers PM891K02 Redundant Processor Unit

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