Rockwell-automation 1791-XXXX Discrete I/O AC and DC Block I/O Input a Uživatelský manuál stáhnout pdf (Strana 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

1771



SN

16 blocks with 150 ohm terminator

57.6K 10,000 cablefeet

PLC



2 family

1

77

1



SN

16

bl

oc

k

s w

i

t

h

1

5

0

o

h

m term

i

nator

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)

2

4 blocks with 150 ohm terminator 57.6K 10,000 cablefeet

57.6K 10,000 cablefeet

PLC5 family PLC5/11 4 blocks with 150 ohm terminator

115.2K 5,000 cablefeet

230.4K 2,500 cablefeet

PLC5/15

1

12 blocks with 150 ohm terminator 57.6K 10,000 cablefeet

Chapter

Objectives

Preinstallation

Considerations

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