P0926AH-B | FOXBORO | Power Supply 

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Processor unit redundancy is available for PM861, PM864, PM865, PM866, and PM891. In this case, the controller contains two processor units, each including memory for system and application software. One unit is acting as primary, the other is backup (hot stand-by). The primary processor unit controls the process. The backup stands by, ready to take over in case of a fault in the primary. The changeover is done bumplessly and in less than 10 ms. During the changeover, the process outputs are frozen.

Following a changeover, the system operates as a system without redundancy with only one processor unit in operation. You can replace the malfunctioning processor unit while the system is running. After the replacement is carried out, the system once again has a redundant processor unit. 

CI840 3BSE022457R1

RVC12-5A

IMCIS02

DI830 3BSE013210R1

DI810 3BSE008508R1

INNPM01 INFI 90

316DB63 HESG 324322R20

316DB61 HESG 435680P1021

316VC61A HESG324503R6

IMASI02 

IMDSO04 

INNIS01

IMAS001

TU849/3BSE042560R1

TB815 /3BSE013204R1

ROM810

IMMFP02

TU842 / 3BSE020850R1

C87-11006

TBU810

TU841/3BSE020848R1

1MRK000005-262

1MRK000005-356

1MRK000005-111

TP860 /3BSE032397R1

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esd : triconex,hima,bently,ics

excitation cards : abb,ge marke