Technical Specifications
Model PM864AK1. Order number 3BHE043536R0001. Processor 800 MHz dual-core ARM Cortex-A9 or PowerPC class. Memory 512 MB DDR3 RAM, 128 MB Flash for firmware and application. Real-time OS VxWorks 6.9. Supply 24 V DC, 18 to 32 V range, consumption 14 W typical, 20 W peak. Ethernet 2 RJ45 10 or 100 Mbps. RS-485 isolated Modbus RTU or ASCII. USB 2.0 host. CEX bus for Profibus DP, FF H1, Modbus, EtherNet or IP. Redundancy 1 to 1 hot-standby bumpless switch below 10 ms. Isolation 1500 V AC supply to comm. Operating temperature -40 to plus 70 C no derating. Storage -55 to plus 85 C. Humidity 5 to 95 percent non-condensing. Dimensions 120 mm by 90 mm by 45 mm. Weight 0.4 kg. DIN TS35 mount. Certifications CE, UL, IEC 61131-3, ATEX Zone 2, IECEx, RoHS.
Functional Features
IEC 61131-3 languages FBD LD ST SFC IL. Cycle time down to 1 ms. OPC UA server built in. Role-based access, TLS 1.2, secure boot. Up to 256 I/O modules via S800 or S900. Redundant CPU power network. Millisecond event logging. Fieldbus Profibus DP or PA, Modbus TCP or RTU, IEC 61850, EtherNet or IP, FF H1.
Application Scenarios
System 800xA DCS head controller. Power plant turbine and boiler control. Oil and gas wellhead and pipeline SCADA. Chemical batch reactor and pharma GMP logging. Water and wastewater pump station control. Metals and mining rolling mill and conveyor interlock.

Material and Structure
AC 800M CPU board, metal heatsink bracket, Ethernet RJ45, CEX bus connector, SD card slot, LED row for power run error status, DIN latch.
Working Principle
Boots application from Flash, scans I/O over S800 bus and fieldbus, executes control task cyclically, exchanges peer data over Ethernet, publishes to 800xA operator workplace, redundant pair mirrors memory over sync cable.
Installation Requirements
Insert into AC 800M rack CPU slot, connect SD832 or SD833 24 V DC redundant supply, bond ground, set node address before start, connect Ethernet to 800xA connect.
Usage Notes
PM864AK1 not pin-compatible with non-AK1 PM8xx without rack check. Redundant pair must match firmware and license key. Do not mix with PM865 or PM866 in same redundant pair.














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