Allen Bradley 1785-L20C Series E

About 1785-L20C

The Allen-Bradley 1785-L20C PLC-5 is a ControlNet programmable controller and processor. It ships with a tray containing several tools for installing the processor, including a 1770-XYC lithium battery, 1 battery cover with a screw, 2 keys, 4 150-Ohm terminating resistors, 2 82-Ohm terminating resistors, 1 DIN rail connector cover, 2 3-pin connectors, and 1 1784-CP7 cable adapter. When installing the 1785-L20C PLC-5 processor, use an approved ground point, avoid touching the connector pins and the backplane connector, and keep the processor in its static-shielded container when it is not in use to avoid electric shock and damage to the processor.

The 1785-L20C has a serial port, a coprocessor port, and a control coprocessor expansion port. It can support up to 512 of any I/O and 512 analog I/O. Its typical scan time is 2 ms per keyword and its I/O scan time per rack is 10 ms at 57.6 kbit/s, and it is 7 ms at 115.2 kbit/s. The 1785-L20C can support up to 16 MCPs.

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