Rockwell-automation 1763 MicroLogix 1100 Programmable Controllers User Manual de usuario descargar pdf (Pagina 235)

Publication 1763-UM001D-EN-P - March 2011

System Loading and Heat Dissipation 233

Validating the System

The example systems shown in the tables below are verified to be acceptable

configurations. The systems are valid because:

• Calculated Current Values < Maximum Allowable Current Values

• Calculated System Loading < Maximum Allowable System Loading

Validating Systems using 1763-L16AWA, 1763-L16BBB, or 1763-L16DWD

Maximum Allowable Values Calculated Values

Current: Current (Subtotal from Table on page 232.):

800 mA at 5V DC 700 mA at 24V DC 0 mA + 260 mA = 260 mA at 5V DC 120 mA + 180 mA = 300 mA at 24V DC

System Loading: System Loading:

20.8 W

= (260 mA x 5V) + (300 mA x 24V)

= (1,300 mW) + (7,200 mW)

= 8,500 mW

= 8.50 W

Validating Systems using 1763-L16BWA

Maximum Allowable Values Calculated Values

Current for Devices Connected to the +24V

DC Sensor Supply:

Sum of all sensor currents

200 mA at 24V DC 140 mA at 24V DC (example sensor value)

Current for MicroLogix Accessories and

Expansion I/O:

Current Values (Subtotal from Table ):

800 mA at 5V DC 700 mA at 24V DC 0 mA + 260 mA = 260 mA at 5V DC 120 mA + 180 mA = 300 mA at 24V DC

System Loading: System Loading:

16.4 W

= (140 mA x 24V) + (260 mA x 5V) + (300 mA x 24V)

= (3,360 mW) + (1,300 mW) + (7,200 mW)

= 11,860 mW

= 11.9 W

1 2 ... 230 231 232 233 234 235 236 237 238 239 240 ... 255 256

Sin comentarios

Rockwell-automation 1763 MicroLogix 1100 Programmable Controllers User Manual de usuario Pagina 235