ABB PM856AK01 STU Processor Unit The ABB PM856AK01 STU 3BSE069514R1, also cataloged as the PM856AK01 Processor Unit, provides CPU execution,...
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SKU: PM856AK01 STU3BSE069514R1
Negara asal: Sweden
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Keterangan
ABB PM856AK01 STU Processor Unit
The ABB PM856AK01 STU 3BSE069514R1, also cataloged as the PM856AK01 Processor Unit, provides CPU execution, communication handling, and I/O data processing functions within ABB AC 800M System 800xA controller platforms.
Hardware Specifications
Parameter
Specification
Model
PM856AK01 STU
Brand
ABB
Origin
Sweden
Product Type
AC 800M Processor Unit
Order Number
3BSE069514R1
Controller Platform
AC 800M
System Compatibility
ABB System 800xA
Processor Type
MPC860
Clock Frequency
24 MHz
Performance
0.46 ms per 1000 Boolean operations
Memory
16 MB
Application RAM Available
10.337 MB
Firmware Storage
2 MB Flash PROM
Redundancy
No
High Integrity
No
Power Supply
24 VDC (19.2 to 30 VDC)
Power Consumption
180 mA typical / 300 mA maximum at 24 VDC
Power Dissipation
4.32 W typical / 7.2 W maximum
Backup Battery
Lithium 3.6 V
Ethernet Ports
2 x RJ45
Ethernet Standard
IEEE 802.3
Ethernet Speed
10 Mbit/s
Control Network Protocol
MMS and IAC
Serial Interfaces
2 x RS-232C
COM3 Interface
RS-232C with modem control signals, 75 to 19200 baud
COM4 Interface
Isolated RS-232C service port, 9600 baud
ModuleBus Capacity
Maximum 96 I/O modules
CEX Bus Capacity
Maximum 12 single CEX bus modules
Applications per Controller
32
Programs per Application
64
Diagrams per Application
128
Tasks per Controller
32
Minimum Cycle Time
Down to 1 ms
Real-Time Clock Stability
100 ppm
Operating Temp
0 to +55 deg C
Storage Temp
-40 to +70 deg C
Relative Humidity
5 to 95 %, non-condensing
Protection Class
IP20
Dimensions
119 x 186 x 135 mm
Weight
Approximately 1.2 kg including base
Industrial Control Communication and Firmware Compatibility
The ABB PM856AK01 STU processor unit communicates with AC 800M control networks through dual Ethernet RJ45 interfaces. Additionally, the controller uses ModuleBus communication for S800 I/O expansion and supports CEX bus modules for external communication functions.
The processor includes firmware storage through Flash PROM and executes Control Builder applications within the System 800xA environment. Furthermore, the controller architecture supports deterministic backplane bus communication velocity for PLC/DCS task execution and I/O density scaling through connected S800 I/O modules.
The CPU board integrates the microprocessor, RAM memory, real-time clock, LED status indicators, INIT push button, and CompactFlash interface. Therefore, the module provides centralized execution and diagnostic functions for AC 800M controller configurations.
Frequently Asked Questions
Q: Does the ABB PM856AK01 STU support redundant processor operation? A: No. The PM856AK01 STU is a non-redundant AC 800M processor unit. Redundant controller architectures require compatible redundant processor models.
Q: Which communication interfaces are available on the PM856AK01 STU? A: The processor provides two RJ45 Ethernet ports for Control Network communication and two RS-232C serial interfaces for service and communication functions.
Q: How does the PM856AK01 STU connect to S800 I/O modules? A: The processor connects to S800 I/O modules through the ModuleBus interface and supports up to 96 I/O modules according to system configuration requirements.
Field Installation Guidelines
Install the PM856AK01 STU processor unit on the specified ABB AC 800M mounting base and DIN rail assembly.
Verify the 24 VDC power supply wiring before energizing the controller.
Connect Ethernet communication cables according to ABB Control Network topology requirements.
Install ModuleBus termination components correctly when connecting S800 I/O modules.
Maintain proper cable separation between communication wiring and high-voltage power conductors.
Connect cable shields according to industrial grounding practices to reduce electromagnetic interference.
Check CPU LED indicators during startup, operation, and fault diagnostics.
Confirm that the installation environment complies with operating temperature, humidity, and IP20 enclosure requirements.
