How can a process controller maintain deterministic execution when its primary CPU fails? The ABB PM891K02 3BSE053242R1 answers with redundant configuration and a maximum switchover time of 10 ms. This CPU module belongs to the AC 800M family and carries article number 3BSE053242R1.
What defines the PM891K02 3BSE053242R1 in redundant architectures?
Redundancy is enabled on this unit, so two controllers can operate as a pair. The maximum switchover time in redundant configuration is 10 ms. Clock synchronization between AC800M controllers runs at 1 ms by CNCP protocol. These timing figures support bumpless transfer in high-availability control loops.
The processor type is MPC8270 with a clock frequency of 450 MHz. Performance for 1000 boolean operations is 0.043 ms. Memory totals 256 MB, of which 208.985 MB RAM is available for the application. Flash memory for storage is present, and firmware is held in 16 MB Flash PROM.
Input voltage, output current, and isolation parameters
The power supply accepts 24 V DC (19.2-30 V DC). Power consumption at +24 V is typically 660 mA and maximum 750 mA. Power dissipation is 15.8 W typical and 18 W maximum. A redundant power supply status input is provided.
For I/O expansion, supply current on the Electrical Modulebus is maximum 1.0 A at 24 V and maximum 1.5 A at 5 V. Supply current on the CEX bus is maximum 2.4 A. Rated isolation voltage is 50 V, and the dielectric test voltage is 500 V a.c. These exact ratings define the module's electrical boundaries.
| Parameter | Value |
|---|---|
| Input voltage | 24 V DC (19.2-30 V DC) |
| Output current, Electrical Modulebus 24 V | max 1.0 A |
| Output current, Electrical Modulebus 5 V | max 1.5 A |
| Output current, CEX bus | max 2.4 A |
| Rated isolation voltage | 50 V |
| Dielectric test voltage | 500 V a.c. |
How does the controller handle I/O and communication?
The Modulebus supports up to 84 modules. Scan rate ranges from 0 to 100 ms, with actual time depending on the number of I/O modules. With a redundant CPU, I/O clusters on Modulebus are 0 electrical plus 7 optical. Up to 12 communication modules can sit on the CEX bus.
Two Ethernet channels operate at 10/100 Mbit/s. The control network protocol is MMS and IAC. A 100 Mbit/s switched Ethernet backbone is recommended. For service access, one RS-232C interface (COM 4) is available at 9 600 baud, opto-isolated, with an RJ-45 female connector.
Environmental and certification data
Operating temperature is +5 to +55 °C, and storage temperature is -40 to +70 °C. Relative humidity is 5 to 95 %, non-condensing. Protection class is IP 20. The module carries CE Mark and marine certificates from ABS, BV, DNV-GL, and LR. Electrical safety follows EN 50178, IEC 61131-2, UL 61010-1, and UL 61010-2-201.
Contact AutoDCSTech with your exact requirements for precise matching of this controller to your AC 800M installation.
Availability & Condition at AutoDCSTech
| Part Number | PM891K02 3BSE053242R1 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | Switzerland |
