Rockwell Automation 1771-A1B_A2B_A3B_A3B1_A4B SERIES B Universal I/O Chassis Installation Instructions - Manual (Page 6)

Universal I/O Chassis 6
Publication 1771ĆIN075A-EN-P - March 2002
I/O Chassis Mounting Dimensions
315mm
(12.41")
16-slot 1771-A4B
12-slot 1771-A3B1
8-slot 1771-A2B
4-slot 1771-A1B
254mm
(10")
12-slot
8-slot
4-slot
16-slot
1771ĆA1B
1771ĆA2B
1771ĆA3B1
1771ĆA4B
193mm 1
(7.60")
593mm
(23.32") 466mm
(18.32")
339mm
(13.32")
212mm
(8.32")
171mm
(6.75") 610mm
(24.01")
483mm
(19.01") 356mm
(14.01")
229mm
(9.01")
power connector
grounding
stud
use four 1/4Ć20 (M6 x 10)
mounting bolts to secure, using
slots, keyholes, or a
combination of both
A1
3
4
5
A2
1
2
A1 backplane common
A2 backplane +5V dc
1 no connection
2 backplane processor enable
3 backplane +5V dc sense
4 backplane signal groundsense
5 no connection 13445
178mm
(7.00")
307mm
(12.09")
25.4mm
(1.0")
use 1/4Ć20 (M6 x 10)
mounting bolts (four
places)
12450ĆI
217mm 1
(8.54")
339mm
(13.35")
465mm
(18.31")
483mm
(19.01")
9mm
(0.34")
26mm
(1.02")
178mm
(7")
130mm
(5.10")
1 Total maximum depth dimension per installation depends on module
wiring andconnectors.
1771ĆA3B
18mm
(0.71")
grounding studs