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What accessories are included in the AC 800M hardware? Jul 03,2026

AC 800M Processor Units

CPU Modules

Several CPU modules are available that vary in terms of processing power, memory size, and redundancy support. Each CPU module is equipped with built in Ethernet port(s) for communication with other controllers and for interaction with operators, engineers, managers, and higher level applications.

These ports can be configured for redundancy for those cases where availability is of paramount importance. It is also equipped with two RS-232C ports that can be used for point-to-point communication with programming/debugging tools and with third-party systems and devices.


Communication & I/O Modules
To each CPU module, a number of communication and I/O modules can be added, for example:
• Additional RS-232C ports
• DeviceNet
• Ethernet IP
• Foundation Fieldbus HSE/H1
• IEC 61850
• MasterBus 300
• MODBUS TCP
• OPC UA
• PROFIBUS DP, PROFINET IO
• S100 I/O
• S800 I/O
• S800L I/O
• S900 I/O
• S800 on Ethernet
• Select I/O

The AC 800M HI controllers are SIL3-rated, IEC 61508-certified, TÜV and ISASecure certified.

The AC 800M controller can be configured with 800xA control builder. When configured with the 800xA control builder AC 800M becomes a tightly integrated part of the System 800xA.


1. Processor Unit & Basic Configurations

Features / CPUs PM866A PM867 SM812 PM891
Processor Unit

PM866AK01 incl: 1 PM866A CPU and required optional items


PM866AK02 incl: 2 PM866AK01

PM867K01 incl: 1 PM867 CPU and required optional items


PM867K02 incl: 2 PM867K01

SM812K01 incl: 1 SM812

PM891K01 incl: 1 PM891 CPU and required optional items


PM891K02 incl: 2 PM891K01

High Integrity Controller No Yes Yes No
Clock frequency 133 MHz 133 MHz 133 MHz 450 MHz
Processor type MPC866 MPC866 MPC866 MPC8270
Flash PROM for firmware storage 4 MB 18 MB 4 MB 16 MB
Flash memory for storage of application and data Yes No No Yes
PM891K01

2. Memory & Performance

Features / CPUs PM866A PM867 SM812 PM891
Memory (RAM) From 5.1 FP4 64 MB 64 MB 64 MB 256 MB
RAM available for application 51.389 MB 46.559 MB - 208.985 MB
CPU redundancy support Yes Yes Yes Yes
Switch over time in red. conf. Max 10 ms Max 10 ms Max 10 ms Max 10 ms
Performance, 1000 boolean operations (a:=b and c) 0.09 ms 0.09 ms - 0.043 ms
Cycle time per application programs Down to 1 ms 10 ms (HI Integrity controllers) 10 ms Down to 1 ms
PM866AK02 AC 800M
Model Article No. Description & Specs Package Including
PM866AK01 3BSE076939R1

Processor Unit


(133 MHz and 64 MB)

• 1 pc PM866A, CPU


• 1 pc TP830, Baseplate, width = 115mm


• 1 pc TB850, CEX-bus terminator


• 1 pc TB807, ModuleBus terminator


• 1 pc TB852, RCU-Link terminator


• 1 pc Battery for memory backup (4943013-6)


No license included

PM866AK02 3BSE081637R1

Redundant Processor Units


(133 MHz and 64 MB)

2 pcs PM866A, CPU


2 pcs TP830, Baseplate, width = 115mm


2 pcs TB807, ModuleBus terminator


1 pc TK850, CEX-bus expansion cable


1 pc TB851, RCU-Link cable


2 pcs Battery for memory backup (4943013-6)


No license included

PM891K01 2PAA122489R1

Processor Unit


(450 MHz and 256 MB)

• 1 pc PM891 CPU Module


• 1 pc TB850, CEX-bus terminator


• 1 pc TB853, RCU Control Link Terminator


No license included

PM891K02 2PAA122490R1

Redundant Processor Unit


(450 MHz and 256 MB)

2 pcs PM891K01 Processor Unit


1 pc TK850V007 CEX-bus Extension Cable


1 pc TK855 RCU Data Link Cable


1 pc TK856 RCU Control Link Cable


No license included


(Note: The BC810K02 is not included in this kit. In order to make hot replacement possible, the BC810K02 is required and has to be ordered separately.)

PM867K01 3BSE076355R1

Processor Unit HI (High Integrity)


(133 MHz and 64 MB)


Certified for SIL3

• 1 pc PM867, CPU


• 1 pc TP830, Baseplate, width = 115mm


• 1 pc TB850, CEX-bus terminator


• 1 pc TB807, ModuleBus terminator


• 1 pc TB852, RCU-Link terminator


• 1 pc Battery for memory backup (4943013-6)


No license included

PM867K02 3BSE081638R1

Redundant Processor Units HI


(133 MHz and 64 MB)


Certified for SIL3

2 pcs PM867, CPU


2 pcs TP830, Baseplate, width = 115mm


2 pcs TB807, ModuleBus terminator


1 pc TK850, CEX-bus expansion cable


1 pc TB851, RCU-Link cable


2 pcs Battery for memory backup (4943013-6)


No license included

SM812K01 3BSE072270R1

Safety CPU module


Certified for SIL3


(Used with PM857, PM863, and PM867)

• 1 pc SM812, Safety Module


• 1 pc TP868, Baseplate, width = 60mm


• 1 pc TK852V10, Synchronization link cable


No articles, such as cables, hubs, switches etc, for Control Network are included in this price list. Please refer to Product Guide AC 800M, for recommended articles. However our 800xA network articles are included in this Product Catalog further back from page 108.


Recommended network components are available in 800xA Networks price list.For more details,please contact with sales6@nseauto.com

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