PN-40379
DIR 10000045375
(Version 00)
Printed in U.S.A.
VI. Appendix A - 1771 chassis to 1756 Chassis Conversion System Selection Process
1) Determine the number of 1771 I/O modules used in the 1771 I/O Chassis to be converted to 1756. NOTE: In some
cases two 1756 modules may be required for one 1771 module. Select the applicable 1492 conversion modules from the
Digital and Analog Conversion Selection Table Matrix.
2) Review the Max Slots for I/O and Chassis Width data from the below table, and select a 1756 I/O Chassis which meets
your conversion needs from Step 1. Ensure the information from the I/O Conversion module tables are reviewed first.
3) Once the 1756 Chassis is selected, select the Conversion Assembly. The Conversion Assembly has the same dimen-
sional foot-print as the 1771 chassis and can use the same mounting hardware. The assembly consists of a base-plate
to hold the conversion modules and a cover-plate to protect the modules and to mount the selected 1756 chassis. The
combined depth of the conversion assembly with the 1756 chassis mounted is 10.25 inches (Controller w/key) to
10.0 inches (Controller w/o Key).
Foot Notes:
1771-A3B is not listed as it is used for 19 inch wide instrumentation panels
Two 1771 width dimensions are provided as some PLC-5 processors have integrated power supplies. Dimension w/PS
includes -P1, -P2, etc. Notice that the width dimension of some 1756 chassis exceed the width of the 1771 chassis with
or without the power supply. Cover-plate chassis mounting design allows the excess 1756 chassis width to be evenly
distributed to both sides, or excess to right or left. Carefully consider this in the conversion
1756-A4 may work in a 1771-A1B application if 4 or less I/O slots were used. Conversion cover-plate is capable to
mount -A4 or -A7
1756-A7 may work in a 1771-A2B application if 6 or less I/O slots were used. Conversion cover-plate is capable to
mount -A7 or -A10
1756-A10 may work in a 1771-A3B1 application if 10 or less I/O slots were used. Conversion cover-plate is capable to
mount -A10 or -A13
1756-A13 may work in a 1771-A4B application if 13 or less I/O slots were used. Conversion cover-plate is capable to
mount -A13 or -A17
V. 1492-CM1771-LD006 Conversion Module Specifications
(Operating specifications are when installed in the Conversion System base / cover-plate assembly)
Max Slots for I/O
4
-A1B w/o
PS
4
-A1B
w/PS
3
6
8
8
6
9
12
-A13
(5)
12
-A3B1
-A10
-A7
(4)
-A2B
w/PS
-A2B w/o
PS
-A7
-A4
(3)
16
-A17
(6)
16
-A4B
Chassis Width
(2)
Conversion Assembly
Chassis Parameter
(1)
1756 Equivalent
Chassis
1756 Equivalent
Chassis
24.01
29.06
23.15
19.01
19.02
9.01
12.61
10.35
14.49
14.49
14.01
17.61
1771 Chassis
1771 Chassis
1771 Chassis
1492-MUA1B-A4-A7
1492-MUA2B-A7-A10
1492-MUA3-A10-A13
1492-MUA4-A13-A17
1771 Chassis
1756 Equivalent
Chassis
1756 Equivalent
Chassis
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)
250.6 g (0.55 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
4 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
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
1492-CM1771-LD006 Conversion Module
Refer to conversion module Specifications Section: Maximum Operating Voltage
1756-OA16
10
L1-0
OUT-0
1
OUT-1
2
OUT-2
3
OUT-3
4
OUT-4
5
OUT-5
6
OUT-6
7
OUT-7
8
OUT-8
11
OUT-9
12
OUT-10
13
OUT-11
14
OUT-12
15
OUT-13
16
OUT-14
17
OUT-15
18
1492-CONCAB005X
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
L1-1
20
9
L2-0
19
L2-1
A
1
00
19
01
3
02
4
03
5
04
6
05
7
06
8
07
9
E
10
11
10
12
11
13
12
13
15
14
16
15
17
16
17
18
20
14
1492-CM1771-LD006
2
Output 14
Output 16
Output 15
Output 17
Output 04
Output 06
Output
Device
Output 05
Output 07
Output 00
Output 02
Output 01
Output 03
Output 10
Output 12
Output 11
Output 13
L1
L2
Conversion: 1771-OAD to 1756-OA16 with 1492-CM1771-LD006
1771-WH, WHF Swing Arm
B
C
D
L1
L1
L1
L1
L2
24
21
22
23
25
1756-OB16E
10
DC-0+
OUT-0
1
OUT-1
2
OUT-2
3
OUT-3
4
OUT-4
5
OUT-5
6
OUT-6
7
OUT-7
8
OUT-8
11
OUT-9
12
OUT-10
13
OUT-11
14
OUT-12
15
OUT-13
16
OUT-14
17
OUT-15
18
1492-CONCAB005X
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-1+
20
9
RTN OUT-0
19
RTN OUT-1
A
1
00
19
01
3
02
4
03
5
04
6
05
7
06
8
07
9
E
10
11
10
12
11
13
12
13
15
14
16
15
17
16
17
18
20
14
1492-CM1771-LD006
2
Output 14
Output 16
Output 15
Output 17
Output 04
Output 06
dc Output
Device
Output 05
Output 07
Output 00
Output 02
Output 01
Output 03
Output 10
Output 12
Output 11
Output 13
+ dc
L2
Conversion: 1771-OBD to 1756-OB16E with 1492-CM1771-LD006
1771-WH, WHF, WHFB Swing Arm
B
C
D
+ dc
+ dc
+ dc
24
21
22
23
25