Rockwell Automation 1791-IOBB USER MANUAL - Manual (Page 10)

Chapter
2
2Ć1
Installing Block I/O
In this chapter you will learn how to mount the block, connect the remote
I/O link, connect the input and output wiring to the block, and terminate
the remote I/O link.
Before installation, you must determine:
the number of blocks desired
the total distance of the installation
transmission rate desired
if external fuses are required
Acceptable combinations are shown in Table 2.A.
Table 2.A
Acceptable Combinations of Processor and Block I/O
When using and Maximum Capacity
Baud Rate
Used
Maximum
Network Distance
1771-SN 16 blocks with 150 ohm terminator
57.6K 10,000 cable-feet
PLC-2 family
1771-SN 16 blocks with 150 ohm terminator
115.2K 5,000 cable-feet
PLC-2 family
1772-SD 1772-SD2
16 blocks/channel, 28 blocks/scanner 57.6K
10,000 cable-feet
1772-SD, 1772-SD2
16 blocks/channel, 28 blocks/scanner
with 150 ohm terminator
115.2K 5,000 cable-feet
Any PLC-3 scanner module
16 blocks/channel, 64 blocks/scanner 57.6K
10,000 cable-feet
Any PLC-3 scanner module
16 blocks/channel, 64 blocks/scanner
with 150 ohm terminator
115.2K 5,000 cable-feet
PLC-3 family
/ /
57.6K 10,000 cable-feet
1775-S5, or -SR5 module
32 blocks/channel, 64 blocks/scanner
with 82 ohm terminator
115.2K 5,000 cable-feet
with 82 ohm terminator
230.4K 2,000 cable-feet
PLC-5/15 12 blocks with 150 ohm terminator 57.6K 10,000 cable-feet
PLC-5 family
PLC-5/25
16 blocks with 150 ohm terminator,
28 blocks with 82 ohm terminator
57.6K 10,000 cable-feet
PLC 5 family
PLC-5/30
16 blocks/channel, 28 blocks per
57.6K 10,000 cable-feet
PLC-5/30
16 blocks/channel, 28 blocks per
processor with 150 ohm terminator
115.2K 5,000 cable-feet
Chapter Objectives
Pre-installation
Considerations