Rockwell Automation 1785-L20C_L40C, D17856.5.14 ControlNet PLC-5 Programmable Controllers User Manual - Manual (Page 20)

Chapter 1
Installing Your ControlNet PLCĆ5 Processor
1-12
To insert/remove the processor into/from the chassis, do the following:
To insert a processor into the chassis:
1. Lift the locking bar and the ejector tab.
2. Slide the processor into the leftĆmost slot of the
I/O chassis.
3. Press down on the ejector tab, and then close the
locking bar over the processor.
To remove a processor from the chassis:
1. Save processor memory.
2. Remove power to the processorĆresident chassis.
3. Disconnect all cables from the processor's ports.
4. Lift the locking bar and the ejector tab, and then
slide the processor from the chassis.
19898
ATTENTION: Make certain that power to the chassis is
off before inserting or removing the processor. !
Ejector
Tab
Locking
Bar
Card Guides
Install a remote I/O link using 1770-CD cable and either a daisy-chain or
trunk-cable/drop-cable configuration.
Verify that your system’s design plans specify cable lengths within
allowable measurements.
Important: The maximum cable length for remote I/O depends on the
transmission rate. Configure all devices on a remote I/O link to
communicate at the same rate.
Table 1.A
Correct Cable Length Based on Communication Rate
A remote I/O link using this
communication rate:
Cannot exceed this
cable length:
57.6K bit/s 3,048 m (approximately 10,000 ft)
115.2K bit/s 1,524 m (approximately 5,000 ft)
230.4K bit/s 762 m (approximately 2,500 ft)
For proper operation, terminate both ends of a remote I/O link by using the
external resistors shipped with the programmable controller. Use either a
150
W or 82W terminator.
Inserting/Removing the
Processor into/from the
I/O Chassis
TrunkĆcable/dropĆcable considerations:
When using a trunkĆcable/dropĆcable
configuration, use 1770ĆSC station
connectors and follow these cableĆ
length guidelines:
• trunkĆcable lengthĊdepends on the
communication rate of the link; see
Table 1.A
• dropĆcable lengthĊ30.4 m
(100 cableĆft) maximum
Important: When using a trunkĆcable/
dropĆcable configuration, set your
communication rate to 57.6kK bit/s.
More
For more information about designing
trunkĆcable/dropĆcable configurations,
see the Data Highway/Data Highway
Plus/Data Highway II/Data Highway
485 Cable Installation Manual,
publication 1770Ć6.2.2.
Installing a Remote I/O Link