PM851 ABB PLC

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General info Article number 3BSE066485R1 (PM851AK01) Redundancy No High Integrity No Clock Frequency 24 MHz Performance
1000 boolean operations 0.46 ms Performance 0.46 ms Memory 12 MB (from 800xA 5.1 FP4) RAM available for application 6.253 MB (from 800xA 5.1 FP4) Flash memory for storage Yes Detailed data Processor type MPC860 Switch over time in red. conf. NA No. of applications per controller 32 No. of programs per application 64 No. of diagrams per application 128 No. of tasks per controller 32 Number of different cycle times 32 Cycle time per application programs Down to 1 ms Flash PROM for firmware storage 2 MB Power supply 24 V DC (19.2-30 V d.c.) Power consumption +24 V typ/max 180 / 300 mA Power dissipation 4.32 W (7.2 W max) Redundant power supply status input Yes Built-in back-up battery Lithium
3.6 V Clock synchronization 1 ms between AC 800M controllers by CNCP protocol Event queue in controller per OPC client Up to 3000 events AC 800M transm. speed to OPC server 36-86 events/sec
113-143 data messages/sec Comm. modules on CEX bus 1 Supply current on CEX bus 2.4 A I/O clusters on Modulebus with non-red. CPU 1 electrical
1 optical I/O clusters on Modulebus with red. CPU NA I/O capacity on Modulebus Max 24 I/O modules Modulebus scan rate 0 - 100 ms (actual time depending on number of I/O modules) Supply current on Electrical Modulebus 24 V max 1.0 A 5 V
10 Mbit/s
RJ-45
female (8-pole) Control Network protocol MMS (Manufacturing Message Service) and IAC (Inter Application Communication) Recommended Control Network backbone 100 Mbit/s switched Ethernet Real-time clock stability 100 ppm (approx. 1 h/year) RS-232C interface 2 (one general
1 for service tool) RS-232C interface (COM3) (non red. only) RS-232C
75-19 200 baud
RJ-45 female (8-pole)
not opto isolated
full RTS-CTS support RS-232C interface (COM4) (non red. only) RS-232C
9 600 baud
RJ-45 female (8-pole)
opto isolated
no RTS-CTS support Environment and certification Temperature
Operating +5 to +55 °C (+41 to +131 °F) Temperature
Storage -40 to +70 °C (-40 to +158 °F) Temperature changes 3 °C/minutes according to IEC/EN 61131-2 Pollution degree Degree 2 according to IEC/EN 61131-2 Corrosion protection G3 compliant to ISA 71.04 Relative humidity 5 to 95 %
non-condensing Emitted noise < 55 dB (A) Vibration 10 < f < 50 Hz 0.0375 mm amplitude
50 < f < 150 Hz 0.5 g acceleration
5 < f < 500 Hz 0.2 g acceleration Rated Isolation Voltage 50 V Dielectric test voltage 500 V a.c. Protection class IP20 according to EN 60529
IEC 529 Altitude 2000 m according to IEC/EN 61131-2 Emission & Immunity EN 61000-6-4
EN 61000-6-2 Environmental conditions Industrial CE Mark Yes Electrical Safety EN 50178
IEC 61131-2
UL 61010-1
UL 61010-2-201 Hazardous location cULus Class 1
Zone 2
AEx nA IIC T4
ExnA IIC T4Gc X Marine certificates ABS
BV
DNV-GL
LR TUV Approval No RoHS compliance EN 505812012 WEEE compliance DIRECTIVE/2012/19/EU Dimensions Width 119 mm (4.7 in.) Height 186 mm (7.3 in.) Depth 135 mm (5.3 in.) Weight (including base) 1100 g (2.4 lbs)

The CPU board contains the microprocessor and 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).

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