ABB  PM 904F  3BDH001002R0001 CPU Module

Part number: PM 904F

Part No:3BDH001002R0001

Manufacturer:ABB

Product Description:Central Processing Unit (CPU) module

Plus CPU module PM 904F  3BDH001002R0001 who expands the capability of the Standard version PM 902F and supports up to four communication interfaces for PROFIBUS or CAN as well as more application memory.

The Central Processing Unit (CPU) module is equipped with a high-performance processor for multitasking and executing fast loop cycle times.

 It offers expanded flexibility via a pluggable SD card, redundancy options for high availability and powers for around 1500 I/Os. It comes with four on-board 100 Mbit/s Ethernet network connection used for communication between controllers, operator stations and engineering tool. 

Two serial line interfaces interfaces can be used for Modbus communication and/or Telecontrol. A third serial interface is reserved for diagnosis purpose and radio clock connection.(Models of the same series PM 901F、PM 902F)

The CPU has 48 MB of memory of which 16 MB are battery backed up. For demanding applications, eight cyclic and priority driven tasks with adjustable cycle time can be configured, as well as a cyclic PLC type task which runs as fast as possible.

 The additional available display unit TD 951F shows status and diagnostic information directly at the module. Operating modes can be modified by switches on the front panel. The controller can be blocked for downloads of application and firmware to enhance security.

 The status, if the controller is locked or unlocked, is shown on the display. S700 I/O modules can be directly plugged to the I/O bus interface on the right side of the CPU module. A maximum of 10 direct I/O modules can be connected to one controller. The CPU and the local S700 I/O modules communicate very fast.

 I/O scan times of 2 ms are possible. Short circuit and line break detection is realized for each channel. Four coupler bus slots on the left side can be assigned with fieldbus interface modules. The PM 904F can be equipped with a maximum of four PROFIBUS modules. 

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