Allen Bradley 1785-L20C15 Controlnet Processor

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Brand Name                 AB

Product reference     1785-L20C15

This manual describes how to install your programmable controller and how to plan for, configure, and use the features of a 1785-L20C15, 1785-L40C15, 1785-L46C15 or 1785-L80C15 programmable controller that are unique to the ControlNet network. When we refer to ControlNet PLC-5 programmable controllers (or “processors”) in this manual, we mean the phase 1.5 programmable controllers: • Catalog number 1785-L20C15 (or PLC-5/20C) • Catalog number 1785-L40C15 (or PLC-5/40C) • Catalog number 1785-L46C15 (or PLC-5/46C) • Catalog number 1785-L80C15 (or PLC-5/80C) For detailed information about features that the ControlNet PLC-5 processors share with Ethernet and Enhanced processors, see the Enhanced and Ethernet PLC-5 Programmable Controllers User Manual, publication 1785-6.5.12.  The information in this manual is intended for engineers and technicians who are installing, programming, and maintaining a control system that includes a ControlNet PLC-5 programmable controller. You should have a background in control-system applications and a basic knowledge of: • programmable real-time control systems • the PLC-5 control system • your operation’s required systems and applications 

Before installing your ControlNet PLC-5 processor: 1. Check your processor package, and make sure that you have the following: 

If any items are missing or incorrect, contact your local Rockwell Automation sales office or distributor. 2. Install and connect a chassis and power supply. Use the following table to find more information about completing these tasks: 

A 3.0 volt lithium battery (cat. no. 1770-XYC) is included with your processor. If the LED on the front of the processor indicates BATT, it means that the battery must be replaced. You must use an exact replacement battery (cat. no. 1770-XYC). Important: In non-hazardous environments, it may be possible to replace the battery while the processor is powered so that your programs are maintained in memory. You may lose your programs if you remove the battery when power is removed. Lithium battery requirements: • do not short, recharge, heat above 85° C, disassemble or expose contents to water • use only the 1770-XYC battery in the processor. DO NOT use any other type or size of battery. ATTENTION ! When you connect or disconnect the battery, an electrical arc can occur. This could cause an explosion in hazardous location installations. Be sure that power is removed or the area is nonhazardous before proceeding. • For safety information on the handling of lithium batteries, including handling and disposal of leaking batteries, refer to Guidelines for Handling Lithium Batteries, publication AG-5.4 • Store batteries in a cool, dry environment. We recommend 25° C with 40% or 60% relative humidity. You may store batteries up to 30 days between -45° - 85° C, such as during transportation. To avoid possible leakage, do not store batteries above 60° C for more than 30 days.

To install or replace the battery:

1. Remove the battery from the shipping bag.

2. Remove the battery cover from the processor. 

3. If you are replacing an existing battery, detach the wired clip from the mating connector on the processor and remove the bat- tery.

4. Connect the new or replacement battery by attaching the wired clip to the mating connector on the processor. 

5. Place the battery and tuck the wires inside the battery area on the processor. 

6. Replace the battery cover. 

7. Use a pencil or erasable pen to write the battery installation date on the battery cover. 

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