ABB PM856 3BSE018128R1 AC 800M Processor Unit

Frequently Asked Questions (FAQ)

Q1: Does PM856 support CPU redundancy?
A1: Yes. PM856 supports hot-standby redundancy with another CPU using RCU Link cable (TK851), with switch-over in less than 10 ms.

Q2: What communication ports are available on PM856?
A2: It provides 2 Ethernet ports (CN1, CN2) and 2 serial ports: COM3 (RS-232C) and COM4 for configuration.

Q3: What I/O connection options are supported by PM856?
A3: It supports S800 I/O via electrical ModuleBus and optical ModuleBus, and communication expansion via CEX-Bus.

Q4: How is PM856 powered?
A4: Powered by 24V DC. ABB SD83x series power supplies are recommended, with SA and SB signals for redundancy supervision.

Q5: Can PM856 be replaced during system operation?
A5: Yes, in redundant configurations, the faulty CPU can be replaced without system downtime.

Q6: Does PM856 support external storage?
A6: Yes. It supports CompactFlash memory card for application and data storage.

Q7: Is an internal battery included in PM856?
A7: Yes. It includes an internal battery for maintaining RAM and real-time clock during power loss.

Q8: Are redundant communication interfaces supported?
A8: Yes. Redundant communication modules can be added via CEX-Bus for high availability.

3BSE018128R1 ABB AC 800M Processor Unit PM856

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Please rest assured that we have a deep cooperation with express delivery companies and can ensure that your goods are delivered to you in good condition.