Instruction Manual

Chapter
2
2-1
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:
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 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
14 blocks with 150 ohm terminator
57.6K 10,000 cablefeet
PLC

2 family
1
77
1

SN
14
blocks
with
150
ohm
terminator
and discrete transfer
115.2K 5,000 cablefeet
PLC

2
f
am
il
y
1772

SD 1772

SD2
16 blocks/channel, 28 blocks/scanner
57.6K 10,000 cablefeet
1
77
2

SD
,
1
77
2

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
with 150 ohm terminator. 128 blocks
57.6K 10,000 cablefeet
PLC 3 f il
A
ny
PLC

3
scanner mo
d
u
l
e
with
150
ohm
terminator
.
128
blocks
with 2 scanners and 150 ohm
terminator.
115.2K 5,000 cablefeet
PLC3 family
32 blocks/channel, 64 blocks/scanner
57.6K 10,000 cablefeet
1775S5, or SR5 module
32
blocks/channel
,
64
blocks/scanner
with 82 ohm terminator. 128 blocks
with 2 scanners, 82 ohm terminator
115.2K 5,000 cablefeet
with
2
scanners
,
82
ohm
terminator
and extended node addressing.
230.4K 2,000 cablefeet
PLC5VME (6008LTV)
4 blocks with 150 ohm terminator
57.6K 10,000 cablefeet
PLC

5 family
57.6K 10,000 cablefeet
PLC
5
f
am
il
y
PLC5/11
4 blocks with 150 ohm terminator
115.2K 5,000 cablefeet
230.4K 2,500 cablefeet
Chapter Objectives
Preinstallation
Considerations