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Phone: +86 16626708626Description
2. Product Core Brief
- Model: PM856K01 (3BSE018104R1)
- Brand: ABB
- Series: AC 800M
- Core Function: Executes control applications and manages I/O in controller
- Product Type: Processor Unit Kit / CPU Module
- Key Specs: 16 MB RAM (battery-backed), 2 Ethernet ports (CN1/CN2), 2 serial ports (COM3/COM4), supports redundancy
- Condition: New Original / New Surplus
3. Key Technical Specifications
- Power Supply Voltage: 24 V DC nominal (19.2–30 V range)
- Power Consumption: Approx. 10–15 W (typical load)
- Processor: MPC860 microprocessor, 48 MHz
- Memory: 16 MB RAM, battery backup (internal or external)
- Communication Interfaces: 2 × RJ45 Ethernet (10BaseT, CN1/CN2 for Control Network), 2 × RS-232C serial (COM3/COM4)
- Redundancy Support: Yes, hot standby with paired units
- CompactFlash Interface: Yes, for application loading and data storage
- Operating Temperature: 0 to +55 °C
- Storage Temperature: –40 to +70 °C
- Mounting: DIN-rail baseplate (TP830, 115 mm width included in kit)
- Protection Class: IP20
- Weight: Approx. 1.1 kg (module); kit ~1 kg shipping
4. Product Introduction
The ABB PM856K01 (3BSE018104R1) is a processor unit kit for the AC 800M controller family in ABB System 800xA, including the PM856 CPU and TP830 baseplate. It runs control applications, handles process I/O, and coordinates communication in industries like oil & gas, chemicals, power, and pulp/paper.
It offers dual Ethernet for redundant Control Network links, serial ports for legacy devices, and battery-backed RAM to retain configs during power loss. Plants use it for reliable execution in mid-size to large systems, especially where redundancy ensures high availability without migrating to newer hardware.
5. Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No LEDs / no boot | Power supply or fuse issue | ❌ Low | Measure 24 V DC at baseplate terminals | Verify PSU output and kit fuse (2A or 3.15A) first |
| Ethernet link down / no comms | Cable/port fault or config mismatch | ✅ High | Check Ethernet LEDs; ping CN1/CN2 from station | Confirm IP, cable integrity, switch ports |
| Application not running / frozen | CPU overload or memory fault | ✅ High | Read status LEDs; check diagnostic buffer in Control Builder | Monitor CPU load; cycle power if safe |
| Redundancy failover fails | Sync link or mismatch | ✅ High | Verify sync LEDs; test manual switchover | Ensure identical units/firmware; check cables |
| Serial port no response | Wiring or baud mismatch | ✅ Medium | Test with loopback or known device | Confirm COM settings in config; inspect wiring |
| Battery low warning / data loss | Backup battery depleted | ✅ Medium | Check LED or diagnostics for battery status | Replace battery; backup config before power-off |
Network config and power issues cause most downtime—the PM856K01 holds up well unless hit by voltage spikes or ESD. If Ethernet/serial check and boot sequence pass but execution fails, consider replacement. Send LED photos, Control Builder logs, and wiring shots to support.
- PM856K01
6. Frequently Asked Questions (FAQ)
Is the PM856K01 hot-swappable in redundant setups? Yes, in paired redundant configurations—one can swap while the other runs. For standalone units, power down the controller first to prevent network disruption. Coordinate with ops to avoid process impact.
What baseplate comes in the kit? The kit includes the TP830 baseplate (115 mm width) with mounting for the PM856 CPU. It provides the backplane connections, Ethernet/serial ports, and power terminals.
Does swapping retain the application and configuration? Yes—application and config store on CompactFlash or in battery-backed RAM, with redundancy sync from the primary. Post-swap, the new unit loads automatically in redundant pairs. For standalone, insert CF card or reload via Control Builder.
Why surplus/new original instead of factory fresh? This is genuine ABB stock—excess factory units or decommissioned spares, never powered beyond testing. We verify boot, LEDs, Ethernet ping, serial loopback, and thermal stability on AC 800M racks. No refurb; just OEM condition at better pricing.
Can I use this with older or newer AC 800M variants? Compatible within AC 800M family (PM8xx series). Firmware must align for redundancy—request matching rev. Not direct swap for PM8xxA/B/C upgrades without checking release notes.
How to tell if the processor is bad vs. network or power? Swap with a tested spare. If symptoms follow the module, it’s faulty. Otherwise, trace Ethernet cables, switches, power stability, or re-download config. Always use ESD protection—static can corrupt these boards instantly.
Stock, lead time, and warranty? Limited on this AC 800M part—ships same/next day from inventory. Full 1-year warranty covers functional issues under normal use. Test reports and photos available on request for validation.
