ABB PM851AK01 3BSE066485R1 Processor Units
Description:
PM851AK01 is ABB  AC 800M Processor Units. PM851AK01 contains the microprocessor and 12MB RAM memory, a real-time clock, LED indicators, INIT push button, and a CompactFlash interface.

The base plate of the PM851A controller has two RJ45 Ethernet ports (CN1, CN2) for connection to the Control Network, and two RJ45 serial ports (COM3, COM4).

Note that a PM851/PM851A is restricted to one Ethernet (CN1) port, thus redundant Ethernet is not available. One of the serial ports (COM3) is an RS-232C port with modem control signals, whereas the other port (COM4) is isolated and used for the connection of a configuration tool.

Simple DIN rail attachment / detachment procedures, using the unique slide & lock mechanism. All base plates are provided with a unique Ethernet address which provides every CPU with a hardware identity. The address can be found on the Ethernet address label attached to the TP830 base plate.

The data for PM851A is the same as for PM856A, except for the RAM and that there is no support for CN2 in PM851A.

Package including:
-PM851A, CPU
-TP830, Baseplate, width=115 mm
-TB850, CEX-bus terminator
-TB807, ModuleBus terminator
-Battery for memory backup (4943013-6)

Features and benefits
Reliability and simple fault diagnosis procedures
Modularity, allowing for step-by-step expansion
IP20 Class protection without the requirement for enclosures
The controller can be configured with 800xA control builder
The controller has full EMC certification
Hardware based on standards for optimum communication connectivity (Ethernet, PROFIBUS DP, etc.)