Rockwell Automation 1791-XXXX Discrete I/O AC and DC Block I/O Input and Output Modules - Manual (Page 20)

Chapter
3
3-1
Installing Block I/O
In this chapter, you will learn how to mount the block, connect the input
and output wiring to the block, add surge suppression (if required), connect
remote I/O wiring, terminate the remote I/O link, and select remote I/O
link speed.
Before installation, you must determine the:
scanner/processor to use
number of blocks on your network
throughput
requirements
total distance of the installation
transmission rate desired
external fuses required (if any)
Acceptable combinations are shown in Table 3.A.
Table 3.A
Acceptable Combinations of Processor and Block I/O
When using and Maximum Capacity
Baud Rate
Used
Maximum
Network Distance
1771ĆSN 16 blocks with 150 ohm terminator
57.6K 10,000 cableĆfeet
PLCĆ2 family
1771ĆSN 16 blocks with 150 ohm terminator
115.2K 5,000 cableĆfeet
PLCĆ2 family
1772ĆSD 1772ĆSD2
16 blocks/channel, 28 blocks/scanner
57.6K 10,000 cableĆfeet
1772ĆSD, 1772ĆSD2
16 blocks/channel, 28 blocks/scanner
with 150 ohm terminator
115.2K 5,000 cableĆfeet
Any PLCĆ3 scanner module
16 blocks/channel, 64 blocks/scanner
with 150 ohm terminator. 128 blocks
57.6K 10,000 cableĆfeet
PLC 3 f il
Any PLCĆ3 scanner module
with 150 ohm terminator. 128 blocks
with 2 scanners and 150 ohm
terminator.
115.2K 5,000 cableĆfeet
PLCĆ3 family
32 blocks/channel, 64 blocks/scanner
57.6K 10,000 cableĆfeet
1775ĆS5, or ĆSR5 module
32 blocks/channel, 64 blocks/scanner
with 82 ohm terminator. 128 blocks
with 2 scanners, 82 ohm terminator
115.2K 5,000 cableĆfeet
with 2 scanners, 82 ohm terminator
and extended node addressing.
230.4K 2,000 cableĆfeet
PLCĆ5VME (6008ĆLTV) 2 4 blocks with 150 ohm terminator 57.6K 10,000 cableĆfeet
57.6K 10,000 cableĆfeet
PLCĆ5 family PLCĆ5/11 4 blocks with 150 ohm terminator 115.2K 5,000 cableĆfeet
230.4K 2,500 cableĆfeet
PLCĆ5/15 1 12 blocks with 150 ohm terminator 57.6K 10,000 cableĆfeet
Chapter Objectives
PreĆinstallation
Considerations