Specifications
DC (12-24V) Input Module
Cat. No. 1771-IB
Installation Data
6
Inputs per Module
8
Module Location
1771 I/O chassis
Input Voltage Range
10 to 27V dc
Nominal Input Current
8mA at 12V dc
24mA at 24V dc
Maximum Off-state Current
3.0mA
Maximum Off-state Voltage
7.0V dc
Minimum On-state Voltage
10V dc
Input Impedance
1 to 2K ohms maximum (on-state)
2 to 3K ohms maximum (off-state)
Input Signal Delay
Low to high propagation delay 12ms +7ms
High to low propagation delay 20ms +7ms
Power Dissipation
5.7 Watts (max.), 0.4 Watts (min.)
Thermal Dissipation
19.3 BTU/hr (max.), 1.4 BTU/hr (min.)
Backplane Current
74mA @ 5V dc +5%
Opto-electrical Isolation
1500V ac rms
Environmental Conditions
Operational Temperature
Storage Temperature
Relative Humidity
0
o
to 60
o
C (32
o
to 140
o
F)
-40
o
to 85
o
C (-40
o
to 185
o
F)
5 to 95% (without condensation)
Conductors
Wire Size
Category
14 gage stranded maximum
3/64 inch insulation maximum
2
1
Keying
Between 4 and 6
Between 14 and 16
Field Wiring Arm
Catalog Number 1771-WA
1
Refer to publication 1770-4.1, Programmable Controller Wiring and Grounding Guidelines.
With offices in major cities worldwide
WORLD
HEADQUARTERS
Allen-Bradley
1201 South Second Street
Milwaukee, WI 53204 USA
Tel: (1) 414 382-2000
Telex: 43 11 016
FAX: (1) 414 382-4444
EUROPE/MIDDLE
EAST/AFRICA
HEADQUARTERS
Allen-Bradley Europe B.V.
Amsterdamseweg 15
1422 AC Uithoorn
The Netherlands
Tel: (31) 2975/43500
Telex: (844) 18042
FAX: (31) 2975/60222
ASIA/PACIFIC
HEADQUARTERS
Allen-Bradley (Hong Kong)
Limited
Room 1006, Block B, Sea
View Estate
28 Watson Road
Hong Kong
Tel: (852) 887-4788
Telex: (780) 64347
FAX: (852) 510-9436
CANADA
HEADQUARTERS
Allen-Bradley Canada
Limited
135 Dundas Street
Cambridge, Ontario N1R
5X1
Canada
Tel: (1) 519 623-1810
FAX: (1) 519 623-8930
LATIN AMERICA
HEADQUARTERS
Allen-Bradley
1201 South Second Street
Milwaukee, WI 53204 USA
Tel: (1) 414 382-2000
Telex: 43 11 016
FAX: (1) 414 382-2400
As a subsidiary of Rockwell International, one of the world’s largest technology
companies — Allen-Bradley meets today’s challenges of industrial automation with over
85 years of practical plant-floor experience. More than 11,000 employees throughout the
world design, manufacture and apply a wide range of control and automation products
and supporting services to help our customers continuously improve quality, productivity
and time to market. These products and services not only control individual machines but
integrate the manufacturing process, while providing access to vital plant floor data that
can be used to support decision-making throughout the enterprise.
Publication 1771–2.4 – May 1990
Supersedes publication 1771–2.4 – January 1986 and 1771–2.4–DU1 – October 1987
PN 955107–15
Copyright 1991 Allen-Bradley Company, Inc. Printed in USA