Rockwell Automation 1785-LTx,D17856.2.1 Classic PLC-5 Programmable Controllers Users Manual User Manual
Page 46
Assigning Addressing Modes,
Racks, and Groups
Chapter 4
4-4
8-Point I/O Modules
Eight-point digital discrete I/O modules have a maximum of eight inputs or
up to eight outputs. Because they do not interfere with each other’s I/O
image, you can place any mix of 8-point I/O modules (including
bidirectional modules, such as block-transfer modules) in any order.
00
01
02
03
04
05
06
07
10
11
12
13
14
15
16
17
17 16 15 14
12
10 07 06 05
03 02 01 00
04
11
13
17 16 15 14
12
10 07 06 05
03 02 01 00
04
11
13
14965
2ĆSlot I/O Group with One 8Ćpt Input Module
and One 8Ćpt Output Module
This I/O group uses 8 bits of the input image table and
8 bits of the output image table.
Output
Terminals
Input
Terminals
2-Slot
I/O Group
Output ImageĆTable Word Corresponding to the I/O Group.
Input ImageĆTable Word Corresponding to the I/O Group.
Unused
Output Bits Used
Input Bits Used
Always 0
00
01
02
03
04
05
06
07
10
11
12
13
14
15
16
17
17 16 15 14
12
10 07 06 05
03 02 01 00
04
11
13
17 16 15 14
12
10 07 06 05
03 02 01 00
04
11
13
2-Slot
I/O Group
11867
2ĆSlot I/O Group with Two 8Ćpt Input Modules
This I/O group uses 16 bits of the input image table.
Input
Terminals
Input
Terminals
Output ImageĆTable Word Corresponding to the I/O Group.
Input ImageĆTable Word Corresponding to the I/O Group.
Unused