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Allen Bradley 1785-BEM LC 5 Backup Communications Expansion Module, 0.6 Amperes at 5 Volts DC

    Buy cheap Allen Bradley 1785-BEM   LC 5 Backup Communications Expansion Module, 0.6 Amperes at 5 Volts DC from wholesalers
     
    Buy cheap Allen Bradley 1785-BEM   LC 5 Backup Communications Expansion Module, 0.6 Amperes at 5 Volts DC from wholesalers
    • Buy cheap Allen Bradley 1785-BEM   LC 5 Backup Communications Expansion Module, 0.6 Amperes at 5 Volts DC from wholesalers
    • Buy cheap Allen Bradley 1785-BEM   LC 5 Backup Communications Expansion Module, 0.6 Amperes at 5 Volts DC from wholesalers
    • Buy cheap Allen Bradley 1785-BEM   LC 5 Backup Communications Expansion Module, 0.6 Amperes at 5 Volts DC from wholesalers
    • Buy cheap Allen Bradley 1785-BEM   LC 5 Backup Communications Expansion Module, 0.6 Amperes at 5 Volts DC from wholesalers

    Allen Bradley 1785-BEM LC 5 Backup Communications Expansion Module, 0.6 Amperes at 5 Volts DC

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    Brand Name : Allen Bradley
    Model Number : 1785-BEM
    Price : negotiable
    Payment Terms : T/T, Western Union
    Supply Ability : 100
    Delivery Time : 2-3 work days
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    Allen Bradley 1785-BEM LC 5 Backup Communications Expansion Module, 0.6 Amperes at 5 Volts DC

    Allen Bradley 1785-BEM LC 5 Backup Communications Expansion Module, 0.6 Amperes at 5 Volts DC



    Technical specifications:
    Brand/ManufacturerAllen Bradley
    Manufacturer Part Number1785-BEM
    Product typeCommunication ExpansionModule
    Module typeCommunication Expansion
    Module Supply voltage5 V dc;24 V dc
    Current rating0.6 A @ 5 V dc
    For use withProvides High Speed Backup Communication and Switchover of the Data Highway Plus and Remote I;O Links
    Mounting typeChassis Mount
    Dimensions115 x 317 x 160 mm
    Minimum operating temperature0 °C
    Maximum operating temperature+60 °C
    Weight0.1 kg
    Length317 mm
    Width160 mm
    DH+/RIO Interface 2
    Operating System Windows 95/NT
    Bus Communcations Local PCI 2.3 Compliant
    LEDs 1 Diagnosis/Status Per Channel
    Max Modules Per System 4
    Weight 0.3 lbs (0.1 kg)
    Coating Conformal Coat
    Required External Power None
    Typical AC Signal Delay (Off) 29 (+/- 8) ms
    Typical DC Signal Delay (Off) 30 (+/- 7) ms
    Wiring Arm 1771-WN
    About 1785-BEM
    The 1785-BEM PLC 5 Backup Communication Module is a backup communication module by Allen-Bradley which is installed in a single I/O slot on the 1771 chassis and which allows for high-speed communication transfer between 2 connected PLC processors. The 1785-BEM backs up the processor’s data and information to prevent the loss of data in the instance of failure in the system. The module requires a backplane current of 0.6A at 5V DC, and it is capable of enabling the PLC-5 processors with 32-bit input capability on the processors image table. The 1785-BEM is designed with a switch assembly which consists of 4 switches set in varying positions, and it requires a field wiring arm (26-14 AWG) which has a wiring arm torque of 9 pounds-inches.
    The 1785-BEM uses a copper wire with 26–14 AWG size as conductors, and it comes with the 1771-CD cable connector for DH+ and Remote I/O (RIO) communication. It has an HSSL communication speed of about 1.2 Mega Baud and it has a factory-built 0.25A relay at 24V DC (resistive). Keying to the backplane is achieved by a connection between pins 8 and 10 and pins 34 and 36 of the backplane top connector and it is CE, UL, and CSA-certified. The 1785-BEM has a factory-designated operating temperature range between 0 and 60 oC (32 and 140 oF) at a humidity range of 5-95% without condensation, and it has a storage temperature range of -40-85 oC (-40-185 oF).




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    Contact person: Anna
    E-mail: wisdomlongkeji@163.com
    Cellphone: +0086-13534205279
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    Switchover
    Should a fault occur in the primary processor, control switches to the secondary system in less than 50 ms (maximum). When a switchover occurs, the outputs in the remote I/O maintain their last state until they
    come under the control of the secondary processor.
    However, keep in mind that the program scans of the two processors are not synchronized. This means that the secondary processor may be scanning all, none, or only part of the program (at your discretion). This manual explains the switchover process, and provides guidelines for developing programs for your PLC-5 backup system. (For more information about switchover, refer to Chapter 6, “Switchover Considerations.”)

    Role of the 1785-BCM Series B Module
    As an integral part of the backup system, the 1785-BCM modules enable high speed communication between the two PLC-5 processors, and permit the secondary processor to assume control of the process. In addition, the 1785-BCM module provides:
    high speed transfer of the data table values from the primary to the secondary system, to ensure that the secondary system’s data table is a copy of the primary system’s a buffer of 4K words for data table values
    exchange of information on the status of the primary and secondary systems
    automatic transfer to the secondary system of the remote input and block transfer read values (analog values, etc.) transfer of control from the primary processor to the secondary
    processor when one of the following conditions occur:
    - power failure
    - processor fault
    - 1785-BCM module fault


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