Rockwell Automation 1492-CM1771-LA005 User Manual
Analog I/O Conversion Module
(Cat 1492-CM1771-LA005)
I. Description
This Analog I/O Conversion Module provides for the conversion of (1) 1771, 8 Channel Thermocouple Input
module to be converted to (1) 1756, 6 or 8 Channel Thermocouple Input module and consists of the following:
(1) 1771 Thermocouple Module (8ch) to (1) 1756 Thermocouple Module (8ch)
(1) 1492-CM1771-LA005 (Series B)
(1) Cable: 1492-CONACAB005G8
(1) Conversion Mounting Assembly: 1492-MUA… (Table 1)
(1) 1771 Thermocouple Module (8ch) to (1) 1756 Thermocouple Module (6ch)
(2) Conversion Module: 1492-CM1771-LA005
(1) Cable: 1492-CONACAB005G
(1) Conversion Mounting Assembly: 1492-MUA… (Table 1)
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 for further details.
WARNING
PN-114291
DIR 10000060102 (Version 02)
Publication 1492-IN049B-EN-E
Printed in U.S.A.
Conversion Compatibility
and Product I.D. Label
25-Pin Connector for cable 1492-CONACAB005
G
1492-CM1771-LA005 Conversion Module
De-energize and lockout any and all power to all I/O eld 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 qualied personnel.
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
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.
PN-114291
DIR 10000060102 (Version 02)
Publication 1492-IN048B-EN-E
(2)
III. Compatibility
es:
1771
1492
Analog I/O Module
Analog I/O Module
1756
1771-IXE 1756-IT6I2 (6 channels) 1492-CM1771-LA005 1492-CONACAB005G
1771-IXHR
1756-IT6I2 (6 channels) 1492-CM1771-LA005 1492-CONACAB005G
1771-IXHR 1756-IRT81I (8 channels) 1492-CM1771-LA005 (B) 1492-CONACAB005G8
1771-IXHR
1756-IRT81I (8 channels) 1492-CM1771-LA005 (B) 1492-CONACAB005G8
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-CONACAB010G
IV. Conversion Module Specifications
(Operating specifications are when installed in the Conversion System base / cover-plate assembly)
I/O Conversion Module
1492
Cable
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)
X g (Y lbs) (includes carton)
50g
30g
2 Amps
12 Amps
NOTICE
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 specic congura-
PN-114291
DIR 10000060102 (Version 02)
Publication 1492-IN048B-EN-E
(3)
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