Allen-Bradley 1492 Field Conversion Module Installation Instructions
Allen-Bradley 1492 Field Conversion Module enables you to seamlessly convert legacy 1771 I/O modules to the newer 1756 platform. With this module, you can upgrade your existing 1771 control systems without removing field wires from the swing arm. It features a user-friendly design, with the 1771 swing arm fitting directly onto the conversion module, and a removable terminal block for connecting the 1756 I/O module. The conversion module is compatible with a range of 1771 and 1756 I/O modules, allowing you to tailor the conversion to your specific needs.
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Digital I/O Conversion Module
PN-114276
DIR 10000060087 (Version 01)
Publication 1492-IN034B-EN-E
Printed in U.S.A.
(Cat 1492-CM1771-LD004)
Conversion Compatibility and
Product I.D. Label
37-Pin Connector for cable 1492-CONCABY
I. Description
This Digital I/O Conversion Module provides for the conversion of (1) 1771, 16 point I/O modules to be converted to
(1) 1756, 16 point I/O module and consists of the following:
(1) 1771 Module (16pt) to (1) 1756 Module (16pt)
(2) Conversion Module: 1492-CM1771-LD004
(1) Cable: 1492-CONCAB005Y (Table 2, Section III)
(1) Conversion Mounting Assembly: 1492-MUA… (Table 1, Section II)
This conversion is accomplished without the removal of any field wires from the existing 1771 Swing Arm. The existing
1771 Swing Arm fits directly onto the edge connector of the 1492 Conversion Module. On one end of the 1492 Cable
is (1) connector for the Conversion Module. On the other end is the Removable Terminal Block (RTB) for the 1756 I/O
module, as shown in the photo below. The I/O signals are routed through the 1492 Conversion Module and the 1492
Cable to the appropriate terminals on the 1756 I/O module per the Wiring Diagrams in Section V. As standard, both
portions of the 1492 Cables are 0.5M long, but we also offer a 1.0M cable length. Refer to the footnotes in Table 2,
Section III for further details.
1492-CM1771-LD004 Conversion Module
De-energize and lockout any and all power to all I/O field devices connected to the A-B 1771 I/O chassis,
and the power to the 1771 I/O chassis itself. Ensure all power is de-energized and locked out to any
device in the control cabinet where the conversion is to be performed. Ensure work is performed by
qualified personnel.
WARNING
PN-114276
DIR 10000060087 (Version 01)
Publication 1492-IN034B-EN-E
Printed in U.S.A.
(Cat 1492-CM1771-LD004)
Conversion Compatibility and
Product I.D. Label
37-Pin Connector for cable 1492-CONCABY
I. Description
This Digital I/O Conversion Module provides for the conversion of (1) 1771, 16 point I/O modules to be converted to
(1) 1756, 16 point I/O module and consists of the following:
(1) 1771 Module (16pt) to (1) 1756 Module (16pt)
(2) Conversion Module: 1492-CM1771-LD004
(1) Cable: 1492-CONCAB005Y (Table 2, Section III)
(1) Conversion Mounting Assembly: 1492-MUA… (Table 1, Section II)
This conversion is accomplished without the removal of any field wires from the existing 1771 Swing Arm. The existing
1771 Swing Arm fits directly onto the edge connector of the 1492 Conversion Module. On one end of the 1492 Cable
is (1) connector for the Conversion Module. On the other end is the Removable Terminal Block (RTB) for the 1756 I/O
module, as shown in the photo below. The I/O signals are routed through the 1492 Conversion Module and the 1492
Cable to the appropriate terminals on the 1756 I/O module per the Wiring Diagrams in Section V. As standard, both
portions of the 1492 Cables are 0.5M long, but we also offer a 1.0M cable length. Refer to the footnotes in Table 2,
Section III for further details.
1492-CM1771-LD004 Conversion Module
De-energize and lockout any and all power to all I/O field devices connected to the A-B 1771 I/O chassis,
and the power to the 1771 I/O chassis itself. Ensure all power is de-energized and locked out to any
device in the control cabinet where the conversion is to be performed. Ensure work is performed by
qualified personnel.
WARNING
(2)
PN-114276
DIR 10000060087 (Version 01)
Publication 1492-IN034B-EN-E
II. Installation
The 1492 Conversion Modules must be installed in a 1492 Conversion Mounting Assembly (see Table 1 below). A
complete System Installation Manual ships with the 1492 Conversion Mounting Assembly.
1) Determine the quantity of each type of 1771 I/O modules used in the 1771 I/O Chassis to be converted.
2) Select the applicable 1492 Conversion Modules from Table 2, Section III.
3) Review the Max Slots for I/O and Chassis Width data from the Table 1 below.
4) Select a 1756 I/O Chassis which has enough I/O Slots.
NOTE: (2) I/O slots are required in the 1756 Chassis for conversions where (1) 1771 I/O module converts to (2) 1756 I/O
modules.
5) Select the 1492 Conversion Mounting Assembly which has enough Conversion Module slots.
NOTE: (2) Conversion Module slots are required in the 1492 Conversion Mounting Assembly for conversions where (2)
1771 I/O module convert to (1) 1756 I/O modules.
NOTE: The 1492 Conversion Mounting Assembly has the same Height & Width foot-print as the 1771 Chassis and is
designed to use the same mounting hardware. The combined Depth of the 1492 Conversion Mounting Assembly with the
1756 Chassis mounted on top is 10.25 inches (Controller w/key) or 10.0 inches (Controller w/o key). Dimension drawings
are included in the System Installation Manual that ships with the 1492 Conversion Mounting Assembly.
Foot Notes:
1771-A3B is not listed as it is used for 19 inch wide instrumentation panels.
Notice that the 1756 Chassis Width sometimes exceeds the 1771 Chassis Width, with or without the Power
Supply. The Cover-Plate of the 1492 Conversion Mounting Assembly allows the 1756 Chassis to be Left justified,
Right justified or Centered. A complete System Installation Manual ships with the 1492 Conversion Mounting
Assembly.
1771 Chassis 1756 Chassis Conversion Mounting Assembly
Chassis Width
Cat. No.
Max
Slots
for
I/O
without
Power
Supply
with
Power
Supply
Cat. No.
Max
Slots
for
I/O
Chassis
Width Cat. No.
Max Slots
for
Conversion
Modules
Chassis
Width
1756-A4 3 10.35
1771-A1B 4 9.01 12.61 1756-A7 6 14.49 1492-MUA1B-A4-A7 4 9.01
1756-A7 6 14.49
1771-A2B 8 14.01 17.61 1756-A10 9 19.02 1492-MUA2B-A7-A10 8 14.01
1756-A10 9 19.02
1771-A3B1 12 19.01 1756-A13 12 23.15 1492-MUA3-A10-A13 12 19.01
1756-A13 12 23.15
1771-A4B 16 24.01 1756-A17 16 29.06 1492-MUA4-A13-A17 16 24.01
Table 1: Bulletin 1771 to 1756 Chassis Conversion
PN-114276
DIR 10000060087 (Version 01)
Publication 1492-IN034B-EN-E
II. Installation
The 1492 Conversion Modules must be installed in a 1492 Conversion Mounting Assembly (see Table 1 below). A
complete System Installation Manual ships with the 1492 Conversion Mounting Assembly.
1) Determine the quantity of each type of 1771 I/O modules used in the 1771 I/O Chassis to be converted.
2) Select the applicable 1492 Conversion Modules from Table 2, Section III.
3) Review the Max Slots for I/O and Chassis Width data from the Table 1 below.
4) Select a 1756 I/O Chassis which has enough I/O Slots.
NOTE: (2) I/O slots are required in the 1756 Chassis for conversions where (1) 1771 I/O module converts to (2) 1756 I/O
modules.
5) Select the 1492 Conversion Mounting Assembly which has enough Conversion Module slots.
NOTE: (2) Conversion Module slots are required in the 1492 Conversion Mounting Assembly for conversions where (2)
1771 I/O module convert to (1) 1756 I/O modules.
NOTE: The 1492 Conversion Mounting Assembly has the same Height & Width foot-print as the 1771 Chassis and is
designed to use the same mounting hardware. The combined Depth of the 1492 Conversion Mounting Assembly with the
1756 Chassis mounted on top is 10.25 inches (Controller w/key) or 10.0 inches (Controller w/o key). Dimension drawings
are included in the System Installation Manual that ships with the 1492 Conversion Mounting Assembly.
Foot Notes:
1771-A3B is not listed as it is used for 19 inch wide instrumentation panels.
Notice that the 1756 Chassis Width sometimes exceeds the 1771 Chassis Width, with or without the Power
Supply. The Cover-Plate of the 1492 Conversion Mounting Assembly allows the 1756 Chassis to be Left justified,
Right justified or Centered. A complete System Installation Manual ships with the 1492 Conversion Mounting
Assembly.
1771 Chassis 1756 Chassis Conversion Mounting Assembly
Chassis Width
Cat. No.
Max
Slots
for
I/O
without
Power
Supply
with
Power
Supply
Cat. No.
Max
Slots
for
I/O
Chassis
Width Cat. No.
Max Slots
for
Conversion
Modules
Chassis
Width
1756-A4 3 10.35
1771-A1B 4 9.01 12.61 1756-A7 6 14.49 1492-MUA1B-A4-A7 4 9.01
1756-A7 6 14.49
1771-A2B 8 14.01 17.61 1756-A10 9 19.02 1492-MUA2B-A7-A10 8 14.01
1756-A10 9 19.02
1771-A3B1 12 19.01 1756-A13 12 23.15 1492-MUA3-A10-A13 12 19.01
1756-A13 12 23.15
1771-A4B 16 24.01 1756-A17 16 29.06 1492-MUA4-A13-A17 16 24.01
Table 1: Bulletin 1771 to 1756 Chassis Conversion
(3)
PN-114276
DIR 10000060087 (Version 01)
Publication 1492-IN034B-EN-E
IV. Conversion Module Specifications
(Operating specifications are when installed in the Conversion System base / cover-plate assembly)
Specification
Dimensions
Approximate Shipping Weight
11.81 in. (height) x 4.38 in. (depth) x 1.5 in. (width)
300 mm. (height) x 111.25 mm (depth) x 38.1 mm (width)
235.3 g (0.52 lbs) (includes carton)
Storage Temperature -40 to +85°C (-40 to +185°F)
Operating Temperature 0 to 60°C (32 to 140°F)
Operating Humidity 5 to 95% at 60°C (non-condensing)
Shock
Non
-
operating
Operating
50g
30g
Operating Vibration 2g at 10 to 500Hz (Agrees with 1756 I/O module specifications)
Maximum Operating Voltage 132 Vac at 47 to 63Hz or 132 Vdc
Max. Module Operating Current
Per Point:
Per Module:
2 Amps
12 Amps
Agency Certifications UL Classified: Under UL File Number E113724
CSA
CE: compliant for all applicable directives
Pollution Degree 2
Environmental Rating IP20
Refer to the Wiring Diagram(s) for
current limits for a specific configuration.
NOTICE
Value
III. Compatiblity
Foot Notes:
To understand any issues concerning I/O module compatibility, refer to the Installation Manuals for the specific
1771 and 1756 I/O modules involved.
The 3 numbers indicate the cable length of each portion of the 1492 Cable. Recommended cable lengths of 0.5M
are shown. Additional cable lengths are as follows:
1.0M = 1492-CONCAB010Y
Table 2: Bulletin 1771 to 1756 Conversion Modules and Cables
1771
Digital I/O Module
1756
Digital I/O Module
1492
Conversion Module
1492
Cable
1771-ID16 1756-IA16I 1492-CM1771-LD004 1492-CONCAB005Y
1756-IH16I 1492-CM1771-LD004 1492-CONCAB005Y
1771-IQ16 1756-IB16I 1492-CM1771-LD004 1492-CONCAB005Y
PN-114276
DIR 10000060087 (Version 01)
Publication 1492-IN034B-EN-E
IV. Conversion Module Specifications
(Operating specifications are when installed in the Conversion System base / cover-plate assembly)
Specification
Dimensions
Approximate Shipping Weight
11.81 in. (height) x 4.38 in. (depth) x 1.5 in. (width)
300 mm. (height) x 111.25 mm (depth) x 38.1 mm (width)
235.3 g (0.52 lbs) (includes carton)
Storage Temperature -40 to +85°C (-40 to +185°F)
Operating Temperature 0 to 60°C (32 to 140°F)
Operating Humidity 5 to 95% at 60°C (non-condensing)
Shock
Non
-
operating
Operating
50g
30g
Operating Vibration 2g at 10 to 500Hz (Agrees with 1756 I/O module specifications)
Maximum Operating Voltage 132 Vac at 47 to 63Hz or 132 Vdc
Max. Module Operating Current
Per Point:
Per Module:
2 Amps
12 Amps
Agency Certifications UL Classified: Under UL File Number E113724
CSA
CE: compliant for all applicable directives
Pollution Degree 2
Environmental Rating IP20
Refer to the Wiring Diagram(s) for
current limits for a specific configuration.
NOTICE
Value
III. Compatiblity
Foot Notes:
To understand any issues concerning I/O module compatibility, refer to the Installation Manuals for the specific
1771 and 1756 I/O modules involved.
The 3 numbers indicate the cable length of each portion of the 1492 Cable. Recommended cable lengths of 0.5M
are shown. Additional cable lengths are as follows:
1.0M = 1492-CONCAB010Y
Table 2: Bulletin 1771 to 1756 Conversion Modules and Cables
1771
Digital I/O Module
1756
Digital I/O Module
1492
Conversion Module
1492
Cable
1771-ID16 1756-IA16I 1492-CM1771-LD004 1492-CONCAB005Y
1756-IH16I 1492-CM1771-LD004 1492-CONCAB005Y
1771-IQ16 1756-IB16I 1492-CM1771-LD004 1492-CONCAB005Y
There are several key application considerations and system specifications (bottom of drawing) when
using these components (conversion module, cable and input module). Read and understand these
considerations before installation.
WARNING
(4)
PN-114276
DIR 10000060087 (Version 01)
Publication 1492-IN034B-EN-E
Conversion Module Installation and Application Considerations
The input delay times for the 1771-ID16 module versus 1756-IA16I module are as follows:
1771-ID16 1756-IA16I
a) Off-to-On Delay 0.57ms 10ms max (plus selectable filter)
b) On-to-Off Delay 9ms or 18ms (selectable) 8ms max (plus selectable filter)
The 1771-ID16 module is rated 74V to 138V AC and105V to 138V DC. The 1756-IA16I is rated 79V to 132V AC. If the input
source voltage is DC use a 1756-IH16I with this conversion module.
Refer to your 1771-ID16 and 1756-IA16I Installation Manual wiring schematics and diagrams for more details.
[Reference Doc: 41170-931 (Version 02)]
V. Wiring Diagrams Conversion: 1771-ID16 to 1756-IA16I
1771-WN Swing Arm
From 1771-ID16
1
2
4
3
6
5
8
7
12
11
14
13
16
15
18
17
22
21
24
23
26
25
28
27
32
31
34
33
36
35
38
37
9
10
19
20
29
30
39
40
Input 14
Input 16
Input 15
Input 17
Input 4
Input 6
Input 5
Input 7
Input 0
Input 2
Input 1
Input 3
Input 10
Input 12
Input 11
Input 13
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
1
2
3
4
5
6
7
8
9
10
11
12
13
15
16
17
18
19
20
14
21
22
23
24
25
26
27
28
29
30
31
32
33
35
36
37
34
IN-0
2
1
IN-1
4
3
IN-2
6
5
IN-3
8
7
IN-4
10
9
IN-5
12
11
IN-6
14
13
Orange
Blue
White/Black
Red/Black
Green/Black
Orange/Black
Blue/Black
Black/White
Red/White
Green/White
Blue/White
Black/Red
White/Red
Orange/Red
Blue/Red
Red/Green IN-7
16
15
IN-8
18
17
IN-9
20
19
IN-10
22
21
IN-11
24
23
IN-12
26
25
IN-13
28
27
IN-14
30
29
Orange/Green
Black/White/Red
White/Black/Red
Red/Black/White
Green/Black/White
Orange/Black/White
Blue/Black/White
Black/Red/Green
White/Red/Green
Red/Black/Green
Green/Black/Orange
Orange/Black/Green
Blue/White/Orange
Black/White/Orange
White/Red/Orange
Orange/White/Blue IN-15
32
31
L2-0
L2-1
L2-2
L2-3
L2-4
L2-5
L2-6
L2-7
L2-8
L2-9
L2-10
L2-11
L2-12
L2-13
L2-14
L2-15
L2
L1
L2-0
L2-1
L2-2
L2-3
L2-4
L2-5
L2-6
L2-7
L2-10
L2-11
L2-12
L2-13
L2-14
L2-15
L2-16
L2-17
1756-IA16I
Conversion Module
1492-CM1771-LD004
Cable
1492-CONCAB005Y
using these components (conversion module, cable and input module). Read and understand these
considerations before installation.
WARNING
(4)
PN-114276
DIR 10000060087 (Version 01)
Publication 1492-IN034B-EN-E
Conversion Module Installation and Application Considerations
The input delay times for the 1771-ID16 module versus 1756-IA16I module are as follows:
1771-ID16 1756-IA16I
a) Off-to-On Delay 0.57ms 10ms max (plus selectable filter)
b) On-to-Off Delay 9ms or 18ms (selectable) 8ms max (plus selectable filter)
The 1771-ID16 module is rated 74V to 138V AC and105V to 138V DC. The 1756-IA16I is rated 79V to 132V AC. If the input
source voltage is DC use a 1756-IH16I with this conversion module.
Refer to your 1771-ID16 and 1756-IA16I Installation Manual wiring schematics and diagrams for more details.
[Reference Doc: 41170-931 (Version 02)]
V. Wiring Diagrams Conversion: 1771-ID16 to 1756-IA16I
1771-WN Swing Arm
From 1771-ID16
1
2
4
3
6
5
8
7
12
11
14
13
16
15
18
17
22
21
24
23
26
25
28
27
32
31
34
33
36
35
38
37
9
10
19
20
29
30
39
40
Input 14
Input 16
Input 15
Input 17
Input 4
Input 6
Input 5
Input 7
Input 0
Input 2
Input 1
Input 3
Input 10
Input 12
Input 11
Input 13
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
1
2
3
4
5
6
7
8
9
10
11
12
13
15
16
17
18
19
20
14
21
22
23
24
25
26
27
28
29
30
31
32
33
35
36
37
34
IN-0
2
1
IN-1
4
3
IN-2
6
5
IN-3
8
7
IN-4
10
9
IN-5
12
11
IN-6
14
13
Orange
Blue
White/Black
Red/Black
Green/Black
Orange/Black
Blue/Black
Black/White
Red/White
Green/White
Blue/White
Black/Red
White/Red
Orange/Red
Blue/Red
Red/Green IN-7
16
15
IN-8
18
17
IN-9
20
19
IN-10
22
21
IN-11
24
23
IN-12
26
25
IN-13
28
27
IN-14
30
29
Orange/Green
Black/White/Red
White/Black/Red
Red/Black/White
Green/Black/White
Orange/Black/White
Blue/Black/White
Black/Red/Green
White/Red/Green
Red/Black/Green
Green/Black/Orange
Orange/Black/Green
Blue/White/Orange
Black/White/Orange
White/Red/Orange
Orange/White/Blue IN-15
32
31
L2-0
L2-1
L2-2
L2-3
L2-4
L2-5
L2-6
L2-7
L2-8
L2-9
L2-10
L2-11
L2-12
L2-13
L2-14
L2-15
L2
L1
L2-0
L2-1
L2-2
L2-3
L2-4
L2-5
L2-6
L2-7
L2-10
L2-11
L2-12
L2-13
L2-14
L2-15
L2-16
L2-17
1756-IA16I
Conversion Module
1492-CM1771-LD004
Cable
1492-CONCAB005Y
5
6
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Key Features
- Seamless 1771 to 1756 conversion
- Field wire retention
- Modular design
- Compatible with various I/O modules
- Easy installation
- Detailed documentation
Related manuals
Frequently Answers and Questions
What 1771 I/O modules can be converted using this module?
The 1492-CM1771-LD004 Conversion Module supports the conversion of 1771-ID16, 1771-IQ16, and 1771-WN modules to 1756-IA16I, 1756-IH16I, and 1756-IB16I modules, respectively. You can find specific details and compatibility information in Table 2 of Section III in the viewed document.
How many 1771 I/O modules can be converted using a single 1492 Conversion Mounting Assembly?
The maximum number of conversion modules that can be installed in the 1492 Conversion Mounting Assembly depends on the specific model you choose. Refer to Table 1 in Section II of the viewed document for details on the maximum slots for conversion modules and chassis widths for different 1492-MUA models.
What are the operating temperature ranges for the 1492 Conversion Module?
The operating temperature range for the 1492-CM1771-LD004 Conversion Module is between 0 to 60°C. Refer to Section IV of the viewed document for detailed operating specifications.
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