Rockwell Automation 1791-XXXX Discrete I/O AC and DC Block I/O Input and Output Modules - Manual (Page 22)

Installing Block I/O
Chapter 3
3-3
Maximum
Network Distance
Baud Rate
Used
Maximum Capacity and When using
16 blocks/channel, 32
blocks/scanner, (128 blocks with 4
57.6K 10,000 cableĆfeet
PLC 5 f il ( ti d)
PLCĆ5/250 Ć requires
blocks/scanner, (128 blocks with 4
scanners) with 150 ohm terminator
and extended node addressing
115.2K 5,000 cableĆfeet
PLCĆ5 family (continued)
PLCĆ5/250 Ć requires
a 5150ĆRS remote scanner
32 blocks/channel, 32
57.6K 10,000 cableĆfeet
32 blocks/channel, 32
blocks/scanner, (128 blocks with 4
scanners) with 82 ohm terminator
115.2K 5,000 cableĆfeet
scanners) with 82 ohm terminator
and extended node addressing
230.4K 2,500 cableĆfeet
S C / S C / S /O S
16 blocks with 150 ohm terminator
57.6K 10,000 cableĆfeet
SLCĆ5/02 or SLCĆ5/03
Controllers
1747ĆSN Remote I/O Scanner
Module
16 blocks with 150 ohm terminator
115.2K 5,000 cableĆfeet
Controllers Module
16 blocks with 82 ohm terminator 230.4K 2,500 cableĆfeet
1 PLCĆ5/15 series A and PLCĆ5/15 series B prior to revision H (B/H) can only address 3 blocks.
2 PLCĆ5/25 revisions prior to A/D can only address 7 blocks.
Figure 3.1 shows the mounting dimensions for the block I/O module.
Mount the blocks vertically with a minimum of 2” between blocks. This air
gap is necessary to maintain proper cooling air flow through the block.
Figure 3.1
Mounting Dimensions for the Block I/O Modules
2 Mounting Holes
for 1/4Ćinch screws
1
30
2.710
(68.8)
1.71
(43.4)
1791Ć8AC
6.95
(176.5)
120V ac IN/OUT
6.60
(167.6)
INPUT OUTPUT
00
01
02
03
04
05
06
07
00
01
02
03
04
05
06
07
0.5
(12.7)
6.95H x 2.710W x 3.85D
(176.5H x 68.8W x 98D)
Inches
(Millimeters)
CAUTION: When tightening grounding stud nut, do not exceed 15 inĆlbs.
2.0 (50.8) air gap
on all 4 sides.
Block
Operating temperature in
air gap below module must
not exceed 60 o C (140 o F).
ALLENĆBRADLEY
Dimensions
1
30
4.35
(110.5)
3.35
(85.1)
6.95
(176.5)
6.60
(167.6)
0.5
(12.7)
1791Ć24B8
24V dc IN/OUT
IN OUT
00
01
02
03
04
05
06
07
30
1 RACK #
ALLENĆBRADLEY
10
11
12
13
14
15
16
17
00
01
02
03
04
05
06
07
G G+1
00
01
02
03
04
05
06
07
IN G
IN (G+1)
00
01
02
03
04
05
06
07
10
11
12
13
14
15
16
17
OUT G
G
IN
00
01
02
03
04
05
06
07
COMM
STATUS
00
01
02
03
04
05
06
07
Equipment
Grounding Stud
6.95H x 4.35W x 3.85D
(176.5H x 110.5W x 98D)
16Ćpoint Block I/O Modules 32Ćpoint Block I/O Modules
00
01
02
03
04
05
06
07
00
01
02
03
04
05
06
07
Installing the Block I/O