Allen-Bradley MicroLogix 1400 User Manual

Rockwell Automation Publication 1766-UM001I-EN-P - June 2015 371
System Loading and Heat Dissipation Appendix H
Calculating Heat
Dissipation
Use the following table when you need to determine the heat dissipation of your
system for installation in an enclosure. For System Loading, take the value from
the appropriate system loading worksheets on pages 369 or 371.
Validating Systems using 1766-L32AWA or 1766-L32BXB
Maximum Allowable Values Calculated Values
Current: Current (Subtotal from Table .):
1225 mA at 5V DC 1155 mA at 24V DC mA @ 5V DC mA @ 24V DC
System Loading: System Loading:
33.845 W
= (________ mA x 5V) + (________ mA x 24V)
= __________ mW + __________ mW
= __________ mW
= __________ W
Validating Systems using 1766-L32BWA
Maximum Allowable Values Calculated Values
Current for Devices Connected to the +24V DC Sensor
Supply:
Sum of all sensor currents
250 mA @ 24V DC mA @ 24V DC
Current for MicroLogix Accessories and Expansion I/O: Current (Subtotal from Table .)
1225 mA @ 5V DC 1155 mA @ 24V DC mA @ 5 V DC mA @ 24V DC
System Loading: System Loading:
39.845 W
= (________ mA x 24V) + (________ mA x 5V) + (________ mA x 24V)
= __________ mW + __________ mW + __________ mW
= __________ mW
= __________ W
Heat Dissipation
Catalog Number Heat Dissipation
Equation or Constant Calculation Sub-Total
1766-L32AWA 15.2 W + (0.4 x System Loading) 15.2 W + (0.4 x ______ W) W
1766-L32BWA 15.7 W + (0.4 x System Loading) 15.7 W + (0.4 x ______ W) W
1766-L32BXB 17.0 W + (0.3 x System Loading) 17.0 W + (0.3 x ______ W) W
1762-IA8 2.0 W x number of modules 2.0 W x _________ W
1762-IF4 2.0 W x number of modules 2.0 W x _________ W
1762-IF2OF2 2.6 W x number of modules 2.6 W x _________ W
1762-IQ8 3.7 W x number of modules 3.7 W x _________ W
1762-IQ16 5.4 W
(1)
x number of modules 5.4 W
(1)
x _________ W
1762-IQ32T 6.8 W x number of modules (@ 30.0V DC)
5.4 W x number of modules (@ 26.4V DC)
6.8 W x _________ (@ 30.0V DC)
5.4 W x _________ (@ 26.4V DC)
W
W
1762-IR4 1.5 W x number of modules 1.5 W x _________ W
1762-IT4 1.5 W x number of modules 1.5 W x _________ W
1762-OA8 2.9 W x number of modules 2.9 W x _________ W

Allen-Bradley MicroLogix 1400 Specifications

General

Processor	32-bit
Expansion Modules	Up to 7 expansion I/O modules
Power Supply	24V DC or 120/240V AC
Programming Software	RSLogix 500
Communication Ports	Ethernet, RS-232/RS-485 combo port
Controller Type	Programmable Logic Controller (PLC)
Series	MicroLogix
Digital Outputs	12
Analog Inputs	6 (embedded)
Analog Outputs	2 (embedded)
High-Speed Counter	6 high-speed counters
Pulse Output	2 (embedded)
Ethernet Port	Yes