Allen-Bradley 1492 Field Wire Conversion Module Installation Instructions

Allen-Bradley 1492 Field Wire Conversion Module enables seamless transition from older 1771 I/O systems to newer 1756 systems. With this module, you can convert 1771 I/O modules (8-point or 16-point) to 1756 I/O modules without removing field wires. This eliminates the need for rewiring and ensures minimal downtime.

Digital I/O Conversion Module
(Cat 1492-CM1771-LD014)
I. Description
This Digital I/O Conversion system provides for the conversion of (1) 1771, 8 point I/O module to (1) 1756, 8 point I/O
module OR (2) 1771, 8 point I/O modules to (1) 1756, 16 point I/O module and consists of the following:
(1) 1771 Module (8pt) to (1) 1756 Module (8pt)
(1) Conversion Modules: 1492-CM1771-LD014
(1) Cable: 1492-CONCAB005U, 1492-CONCAB005V, 1492-CONCAB005W (Table 2)
(1) Conversion Mounting Assembly: 1492-MUA… (Table 1)
(2) 1771 Module (8pt) to (1) 1756 Module (16pt)
(2) Conversion Modules: 1492-CM1771-LD014
(1) Cable: 1492-C005005X_ (Table 2)
(1) Conversion Mounting Assembly: 1492-MUA… (Table 1)
This conversion is accomplished without the removal of any field wires from the existing 1771 Swing Arms. The existing
1771 Swing Arms fit directly onto the edge connectors of the 1492 Conversion Modules. On one end of the 1492 Cables
are (1) or (2) connectors for the Conversion Modules. 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 IV. As standard, 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.
Conversion Compatibility and Product I.D. Label
25-Pin Connector for cables 1492-CONCAB005 U,
1492-CONCAB005V, 1492-CONCAB005W
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-114286
DIR 10000060097 (Version 01)
Publication 1492-IN050B-EN-E
Printed in U.S.A.
Conversion
Compatibility and
Product I.D. Label
25-Pin Connector
for cable
1492-C005005X_
1492-CM1771-LD014 Conversion Module

(2)
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.
Table 1: Bulletin 1771 to 1756 Chassis Conversion
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
PN-114286
DIR 10000060097 (Version 01)
Publication 1492-IN050B-EN-E

IV. Conversion Module Specifications
(Operating specifications are when installedin the Conversion System base / cover-plate assembly)
Specification
Dimensions
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
Max. Module Operating Current
Per Point:
Per Module:
2 Amps
10 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
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)
250.6 g (0.55 lbs) (includes carton)
III. Compatibility
Table 2: Bulletin 1771 to 1756 Conversion Modules and Cables
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.
One conversion module required for each of the two 1771 modules.
The 3 numbers indicate the cable length of the 1492 Cable. Recommended cable length of 0.5M is shown.
Additional cable lengths are as follows:
1.0M = 1492-CONCAB010U or 1492-CONCAB010V or 1492-CONCAB010W
The 6 numbers indicate the cable length of each portion of the 1492 Cable. Recommended cable lengths of 0.5M /
0.5M are shown. Additional cable lengths are as follows:
1.0M / 1.0M = 1492-C010010XF or 1492-C010010XG or 1492-C010010XJ
0.5M / 1.0M = 1492-C005010XF or 1492-C005010XG or 1492-C005010XJ
1.0M / 0.5M = 1492-C010005XF or 1492-C010005XG or 1492-C010005XJ
1771
Digital I/O Module
1756
Digital I/O Module
1492
Conversion Module
1492
Cable
1771-IQ (Qty 2) 1756-IB16I 1492-CM1771-LD014 (Qty 2) 1492-C005005XJ (SOURCE)
1771-OC 1756-OC8 1492-CM1771-LD014 1492-CONCAB005V
1771-OA 1756-OA8E 1492-CM1771-LD014 1492-CONCAB005U
1771-ON 1756-ON8 1492-CM1771-LD014 1492-CONCAB005W
1771-IV (Qty 2) 1756-IV16 1492-CM1771-LD014 (Qty 2) 1492-C005005XG
1771-OB (Qty 2) 1756-OB16D 1492-CM1771-LD014 (Qty 2) 1492-C005005XF
1771-OM (Qty 2) 1756-OA16 1492-CM1771-LD014 (Qty 2) 1492-C005005XG
PN-114286
DIR 10000060097 (Version 01)
Publication 1492-IN050B-EN-E (3)

PN-114286
DIR 10000060097 (Version 01)
Publication 1492-IN050B-EN-E
V. Wiring Diagrams
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
1756-IB16I
Conversion: 1771-IQ (2) to 1756-IB16I (1), Sourcing
Conversion Module
1492-CM1771-LD0014
Conversion Module
1492-CM1771-LD0014
Cable
1492-C005005XJ
1771-WA Swing Arm
From 1771-IQ
1771-WA Swing Arm
From 1771-IQ
CABLE”A”
CABLE”B”
Conversion Module Installation and Application Considerations
This Bul. 1492 cable consists of 2 separate cables (cable “A” and cable “B”) wired to one 1756-IB16I RTB. Each cable can be either 0.5M
or 1.0M (005=0.5M, 010=1.0M). Ensure that cable A and cable B are connected to the correct module in the conversion.
The input delay times for the 1771-IQ module versus the 1756-IB16 module are as follows:
1771-IQ 1756-IB16I w/1492-C005005XJ
a) Off-to-On Delay 12ms (+/-14ms) 1ms max (plus selectable filter)
b) On-to-Off Delay 12ms (+/-14ms) 4ms max (plus selectable filter)
The 1771-IQ module is rated 5V to 30V DC. The 1756-IB16I module is rated 10V to 30V SOURCING DC only.
Refer to your 1771-IQ and 1756-IB16I Installation Manual wiring schematics and diagrams for more details.
For Sinking applications use 1492-CM1771-LD007. [Reference Doc: 41170-991 (Version 00)]
(4)
B
3
4
5
6
7
A
0
1
2
Black
White
Red
Green
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
DC+
GND-0
2
GND-1
4
GND-2
6
GND-3
8
GND-4
1
GND-5
3
GND-6
5
GND-7
7
9
11
13
15
10
12
14
16
GND-15
NOT-USED
LOAD
-
+
1
19
3
4
5
6
7
8
9
10
11
12
13
15
16
17
18
20
14
2
24
21
22
23
25
DC -
GND 00
GND 01
GND 02
GND 03
GND 04
GND 05
GND 06
GND 07
B
3
4
5
6
7
A
0
1
2
Black
White
Red
Green
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
DC +
GND-8
18
OUT-9
20
OUT-10
22
OUT-11
24
GND-12
17
GND-13
19
GND-14
21
GND-15
23
25
27
29
31
26
28
30
32
LOAD
-
+
1
19
3
4
5
6
7
8
9
10
11
12
13
15
16
17
18
20
14
2
24
21
22
23
25
DC -
GND 08
GND 09
GND -10
GND -11
GND -12
GND -13
GND -14
GND -15
IN - 0
IN - 1
IN - 2
IN - 3
IN - 4
IN - 5
IN - 6
IN - 7
33
34
35 NOT-USED
-
36 NOT-USED
IN - 8
IN - 9
IN - 10
IN - 11
IN - 12
IN - 13
IN - 14
IN - 15