中文版
Description
1756-L71 ControlLogix Logix5571 Processor Module
The Allen-Bradley 1756-L71 is a ControlLogix Programmable Automation Controller. It has an
available storage of 2 MB for user memory and an I/O memory of 0.98 MB. It also has an onboard
4-character alphanumeric display for easy monitoring of run-time and module information and controller
diagnostics. It has an open-style enclosure and built-in One (1) 2.0 full-speed USB port available. The
communication options that are available include DeviceNet, ControlNet, EtherNet/IP, Remote I/O Data
Highway Plus, Third-party process and networks, and SynchLink. It also ships with a 1 GB non-volatile
memory, but you can upgrade it to 2 GB with the 1784-SD2. It is recommended that the SD card be left
installed in the controller. The 1756-L71 controller ships with three capacitor energy storage modules,
two of which are removable. It has a current draw of 5 mA at 1.2 Volts DC and 800 mA at 5.1 Volts DC. The
1756-L71 controller also has a continuous isolation voltage of 30 Volts, a maximum power dissipation
of 2.5 Watts, and a thermal dissipation of 8.5 BTU/hour. It has a maximum analog I/O, digital I/O, and a total I/O of 4,000, 128,000, as well as 128,000, respectively.
1756-L71S
It has an operating temperature range of 0 to 60 Degrees Celsius and a storage temperature range
of -40 to 85 Degrees Celsius. Its maximum surrounding air temperature is 60 degrees Celsius and it
has a noncondensing relative humidity of 5% to 95%. The controller has a vibration of 2G at 10 to
500 Hertz, an operating shock of 30G, and a non-operating shock of 50G that goes down to 45G when
the SD card is installed. Other controllers may require the user to understand first PLC registers
specifically Byte and Bit in order to start addressing program elements. With 1756-L71, the user simply
needs to insert a program element and select the logical channel to where the I/O is physically wired.
In other PLCs, the user may find the need to move a register to another to initiate conversion and
processing just to get the analog data. This controller simply requires the user to find the logical channel where the I/O signal is physically terminated.
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