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Analog and Digital I/O Conversion Module
(Cat 1492-CM1771-LA003)
I. Description
This I/O Conversion Module provides for the conversion of (1) 1771, 4 Ch Analog I/O module to be converted to (1) 1756, 6 Ch
Analog I/O module and consists of the following:
(1) 1771 Module (4ch) to (1) 1756 Module (6ch)
(1) Conversion Module: 1492-CM1771-LA003
(1) Cable: 1492-CONACAB005E (Table 2)
(1) Conversion Mounting Assembly: 1492-MUA… (Table 1)
This I/O Conversion Module also provides for the conversion of (2) 1771 Digital I/O modules that also use the 1771-WC swing
arm. In this case, this I/O conversion modules provide for the conversion of (2) 1771, 8 pt. Digital I/O modules to be converted
to (1) 1756, 16 pt. Digital I/O module and consists of the following:
(2) 1771 Module (8pt) to (1) 1756 Module (16pt)
(2) Conversion Module: 1492-CM1771-LA003
(1) Cable: 1492-C005005XS (Table 2)
(1) Conversion Mounting Assembly: 1492-MUA… (Table 1)
These conversions are accomplished without the removal of any field wires from the existing 1771 Swing Arms. The existing
1771 Swing Arms fit directly onto the edge connector of the 1492 Conversion Modules. For the Analog I/O conversions, one
end of the 1492 Cable has (1) connector for the Conversion Module and on the other end is (1) Removable Terminal Block
(RTB) for the 1756 I/O module. For the Digital I/O conversions, one end of the 1492 Cable has (2) connectors, one for each of
the (2) Conversion Modules and on the other end is (1) Removable Terminal Block (RTB) for the 1756 I/O module. See the
photos below.
The I/O signals are routed through the 1492 Conversion Module(s) and the 1492 Cable to the appropriate terminals on the
1756 I/O module per the Wiring Diagrams in Section V. 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 for further details.
1492-CM1771-LA003
Conversion Module
WARNING
Conversion Compatibility and
Product I.D. Label
37-Pin Connector for cable
1492-CONACAB005E
Conversion
Compatibility and
Product I.D. Label
25-Pin Connector
for cable
1492-C00500
5XS
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.
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Publication 1492-IN047B-EN-E
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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
1771 Chassis 1756 Chassis Conversion Mounting Assembly
Max
Cat. No.
1771-A1B 4 9.01 12.61
1771-A2B 8 14.01 17.61
1771-A3B1
1771-A4B 16 24.01
Slots
for
I/O
12 19.01
Chassis Width
without
Power
Supply
with
Power
Supply
Cat. No.
1756-A4
1756-A7
1756-A7
1756-A10
1756-A10
1756-A13
1756-A13
1756-A17
Max
Slots
Chassis
for
I/O
12 23.15
12 23.15
16 29.06
Width
3 10.35
6 14.49
6 14.49
9 19.02
9 19.02
Max Slots
Cat. No.
1492-MUA1B-A4-A7 4 9.01
1492-MUA2B-A7-A10 8 14.01
1492-MUA3-A10-A13 12 19.01
1492-MUA4-A13-A17 16 24.01
for
Conversion
Modules
Chassis
Width
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.
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III. Compatibility
es:
1771
1492
Analog I/O Module
Analog I/O Module
1756
1771-OFE1 1756-OF6VI 1492-CM1771-LA003 1492-CONACAB005E
1771-OFE2 1756-OF6CI 1492-CM1771-LA003 1492-CONACAB005E
1771-IG (Qty 2) (Digital) 1756-IG16 1492-CM1771-LA003 1492-C005005XS
1771-OG (Qty 2) (Digital) 1756-OG16 1492-CM1771-LA003 1492-C005005XS
t Not
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 length of the 1492 Cable. Recommended cable lengths of 0.5M are shown.
Additional cable lengths are as follows:
1.0M = 1492-CONACAB010E
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-C010010XS
0.5M / 1.0M = 1492-C005010XS
1.0M / 0.5M = 1492-C010005XS
IV. Conversion Module Specifications
I/O Conversion Module
1492
Cable
(Operating specifications are when installed in the Conversion System base / cover-plate assembly)
Specification Value
Dimensions
Approximate Shipping Weight
Storage Temperature -40 to +85 C (-40 to 185 F)
Operating Temperature 0 to 60 C (32 to 40 F)
Operating Humidity 5 to 95% at 60 C (non-condensing)
Shock
Non-operating
Operating
Operating Vibration 2g at 10 to 500Hz (Agrees with 1756 I/O module specification)
Maximum Operating Voltage 30 Vdc
Max. Module Operating Current
Per Point:
Per Module:
Agency Certifications
Pollution Degree 2
Environmental Rating IP20
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)
50g
30g
2 Amps
12 Amps
NOTICE
UL Classified: Under UL File Number E113724
CSA
CE: compliant for all applicable directives
Refer to the Wiring Diagram(s) for
current limits for a specific configuration.
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V. Wiring Diagrams
Conversion: 1771-OFE1 to 1756 -OF6VI
Voltage
L
oad
WARNING
+
-
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.
Channel 1 Out +
Channel 1 Out -
Channel 2 Out +
Channel 2 Out Channel 3 Out +
Channel 3 Out -
Channel 4 Out +
Channel 4 Out -
Not Used
Not Used
1771-WC Swing Arm
From 1771-OFE1
Conversion Module
1492-CM1771-LA003
A
0
1
2
3
4
5
6
7
B
1492-CONACAB005E 1756-OF6VI
Red/White
13
Green/Black/White
25
Red/Black/White
24
White/Black/Red
23
Black/White/Red
22
Orange/Green
21
Blue/Red
19
Orange/Red
18
17
16
1
2
3
4
5
6
7
8
9
10
11
12
14
15
20
SH
Cable
1
5
2
6
7
11
8
12
15
19
16
20
13
14
OUT-0
RTN-0
OUT-1
RTN-1
OUT-2
RTN-2
OUT-3
RTN-3
OUT-4
RTN-4
Not Used
Not Used
Not Used
Not Used
Conversion Module Installation and Application Considerations
This Bul. 1492 cable consists of a cable wired to one 1756-OF6VI RTB. Recommended cable lengths of 0.5M or 1.0M (005=0.5M, 010=1.0M).
See table 2 for other lengths.
SHIELD GROUNDING: In some installations, the field wiring shield was grounded on the 1771 chassis. If this was the case, the installer must
remove these shield connections from the 1771 chassis and they can be connected to the grounding stud on the 1492-CM1771-LA003 module.
The pre-wired cable used between the 1492-CM1771-LA003 module and the 1756-OF6VI [1492-CONACAB005E] provides a shield ground lug to
ground the shield at the 1756 ControlLogix chassis, this must be connected. Do NOT connect this ground lug to the conversion module grounding
stud.
The 1771-OFE1 analog output range was configured by jumpers, the output range for the 1756-OF6VI is software configured. Please ensure
the correct output range is configured in the 1756-OF6VI.
Refer to your 1771-OFE1 and 1756-OF6VI Installation and User Manuals for additional information concerning comparisons of module wiring,
features and configuration details. [Reference Doc: 41170-949 (Version 02)]
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V. Wiring Diagrams (Cont’d)
Conversion: 1771-OFE2 to 1756-OF6CI
WARNING
Current
Load
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.
Conversion Module
1492-CM1771-LA003
+
-
Channel 1 Out +
Channel 1 Out -
Channel 2 Out +
Channel 2 Out Channel 3 Out +
Channel 3 Out -
Channel 4 Out +
Channel 4 Out -
Not Used
Not Used
A
0
1
2
3
4
5
6
7
B
1771-WC Swing Arm
From 1771-OFE2
1492-CONACAB005E 1756-OF6CI
Red/White
13
Green/Black/White
25
Red/Black/White
24
White/Black/Red
23
Black/White/Red
22
Orange/Green
21
Blue/Red
19
Orange/Red
18
17
16
1
2
3
4
5
6
7
8
9
10
11
12
14
15
20
SH
Cable
1
5
2
6
7
11
8
12
15
19
16
20
13
14
OUT-0
RTN-0
OUT-1
RTN-1
OUT-2
RTN-2
OUT-3
RTN-3
OUT-4
RTN-4
Not Used
Not Used
Not Used
Not Used
Conversion Module Installation and Application Considerations
This Bul. 1492 cable consists of a cable wired to one 1756-OF6CI RTB. Recommended cable lengths of 0.5M or 1.0M (005=0.5M, 010=1.0M).
See table 2 for other lengths.
SHIELD GROUNDING: In some installations, the field wiring shield was grounded on the 1771 chassis. If this was the case, the installer must
remove these shield connections from the 1771 chassis and they can be connected to the grounding stud on the 1492-CM1771-LA003 module.
The pre-wired cable used between the 1492-CM1771-LA003 module and the 1756-OF6CI [1492-CONACAB005E] provides a shield ground lug to
ground the shield at the 1756 ControlLogix chassis, this must be connected. Do NOT connect this ground lug to the conversion module grounding
stud.
IMPORTANT: The 1771-OFE2 module required the use of an external power supply to drive the analog device. The
1756-OF6CI analog output provides the drive power to the analog device. ENSURE the external power supply is REMOVED from the current loop
before applying power to the 1756-OF6CI module or the analog output module may be damaged.
The 1771-OFE2 analog output ranges were factory set, the output range for the 1756-OF6CI is software configured. Please ensure the correct
output range is configured in the 1756-OF6CI.
The 1756-OF6CI module can drive a load up to 550 ohms with the standard pre-configured cable [1492-CONACAB005E].
If greater than a 550 ohm drive current is required, the pre-wired cable can be modified at the 1756-OF6CI terminal block to drive up to a 1000
ohms. Refer to the 1756-OF6CI Installation Manual for modification details.
Refer to your 1771-OFE2 and 1756-OF6CI Installation and User Manuals for additional information concerning comparisons of module wiring,
features and configuration details. [Reference Doc: 41170-948 (Version 02)]
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V. Wiring Diagrams (Cont’d)
Conversion: 1771-IG (2) to 1756-IG16 (1)
WARNING
5V DC
SUPPLY
5V DC
SUPPLY
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.
+
Input
Device
-
1771-WC Swing Arm
From 1771-IG
+
Input
Device
-
1771-WC Swing Arm
From 1771-IG
+
-
+
-
Conversion Module
1492-CM1771-LA003
+ DC
Input 0
Input 1
Input 2
Input 3
Input 4
Input 5
Input 6
Input 7
Common
A
0
1
2
3
4
5
6
7
B
Conversion Module
1492-CM1771-LA003
A
+ DC
Input 0
Input 1
Input 2
Input 3
Input 4
Input 5
Input 6
Input 7
Common
0
1
2
3
4
5
6
7
B
Red/White
13
Green/Black/White
25
Red/Black/White
24
White/Black/Red
23
Black/White/Red
22
Orange/Green
21
Blue/Red
19
Orange/Red
18
17
16
1
2
3
4
5
6
7
8
9
10
11
12
14
15
20
SH
Red/White
13
Green/Black/White
25
Red/Black/White
24
White/Black/Red
23
Black/White/Red
22
Orange/Green
21
Blue/Red
19
Orange/Red
18
White/Red
17
16
Black/Red
1
2
3
4
5
6
7
8
9
10
11
12
14
15
20
SH
White/Red
Black/Red
Cable
1492-C005005XS
CABLE”A”
CABLE”B”
1756-IG16
10
+ DC -0
1
IN-0
2
IN-1
3
IN-2
4
IN-3
5
IN-4
6
IN-5
7
IN-6
8
IN-7
9
- DC -0
20
+ DC -1
11
IN-8
12
IN-9
13
IN-10
14
IN-11
15
IN-12
16
IN-13
17
IN-14
18
IN-15
19
- DC -1
Conversion Module Installation and Application Considerations
This Bul. 1492 cable consists of 2 separate cables (cable “A” and cable “B”) wired to one 1756-IG16 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-IG module versus the 1756-IG16 module are as follows:
1771-IG 1756-IG16 w/ 1492-C005005XS
a) Off-to-On Delay 1ms (+/-10ms) 270ms max (plus selectable filter)
b) On-to-Off Delay 1ms (+/-10ms) 390ms max (plus selectable filter)
The 1771-IG module is rated 5V DC TTL INPUT MODULE. The 1756-IG16 module is rated 5V DC TTL INPUT MODULE only.
Refer to your 1771-IG and 1756-IG16 Installation and User Manuals for additional information concerning comparisons of module wiring,
features and configuration details. [Reference Doc: 41171-027 (Version 00)]
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V. Wiring Diagrams (Cont’d)
Conversion: 1771-OG (2) to 1756-OG16 (1)
WARNING
+
5V DC
SUPPLY
5V DC
SUPPLY
-
+
-
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.
Output
Device
1771-WC Swing Arm
From 1771-OG
Output
Device
1771-WC Swing Arm
From 1771-OG
+
-
+
-
Conversion Module
1492-CM1771-LA003
+ DC
Output 0
Output 1
Output 2
Output 3
Output 4
Output 5
Output 6
Output 7
Common
A
0
1
2
3
4
5
6
7
B
Conversion Module
1492-CM1771-LA003
A
+ DC
Output 8
Output 9
Output 10
Output 11
Output 12
Output 13
Output 14
Output 15
Common
0
1
2
3
4
5
6
7
B
Red/White
13
Green/Black/White
25
Red/Black/White
24
White/Black/Red
23
Black/White/Red
22
Orange/Green
21
Blue/Red
19
Orange/Red
18
White/Red
17
Black/Red
16
1
2
3
4
5
6
7
8
9
10
11
12
14
15
20
SH
Red/White
13
Green/Black/White
25
Red/Black/White
24
White/Black/Red
23
Black/White/Red
22
Orange/Green
21
Blue/Red
19
Orange/Red
18
White/Red
17
16
Black/Red
1
2
3
4
5
6
7
8
9
10
11
12
14
15
20
SH
Cable
1492-C005005XS
CABLE”A”
CABLE”B”
1756-OG16
10
+ DC -0
1
OUT-0
2
OUT-1
3
OUT-2
4
OUT-3
5
OUT-4
6
OUT-5
7
OUT-6
8
OUT-7
9
- DC -0
20
+ DC -1
11
OUT-8
12
OUT-9
13
OUT-10
14
OUT-11
15
OUT-12
16
OUT-13
17
OUT-14
18
OUT-15
19
- DC -1
Conversion Module Installation and Application Considerations
This Bul. 1492 cable consists of 2 separate cables (cable “A” and cable “B”) wired to one 1756-OG16 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-OG module versus the 1756-OG16 module are as follows:
1771-OG 1756-OG16 w/ 1492-C005005XS
a) Off-to-On Delay 1ms (+/-10ms) 45ms max (plus selectable filter)
b) On-to-Off Delay 1ms (+/-10ms) 145ms max (plus selectable filter)
The 1771-OG module is rated 5V DC TTL INPUT MODULE. The 1756-OG16 module is rated 5V DC TTL INPUT MODULE only.
Refer to your 1771-OG and 1756-OG16 Installation and User Manuals for additional information concerning comparisons of module wiring,
features and configuration details. [Reference Doc: 41171-028 (Version 00)]
PN-114289
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PN-114289
DIR 10000060100 (Version 01)
Publication 1492-IN047B-EN-E
Printed in U.S.A.
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