Allen-Bradley micrologix 1500, Руководство пользователя

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1 Publication 1764-UM001A-US-P
Appendix
F
System Loading and Heat Dissipation
System Loading
Limitations When you connect MicroLogix accessories and expansion I/O, an electrical load is
placed on the base unit power supply. This section shows how to calculate the load
and validate that the system will not exceed the capacity of the base unit power
supply.
The following example is provided to illustrate system loading validation. The
system validation procedure accounts for the amount of 5V dc and 24V dc current
consumed by controller, expansion I/O, and user supplied equipment. Use the
MicroLogix 1500 System Expansion Worksheet - Example on page F-2 to validate
your specific configuration.
Current consumed by the Base Units, Memory Modules, Real Time Clock
Modules, and the Right End Cap Terminator (for systems utilizing Compact I/O
expansion) has already been factored into the calculations. A system is valid if the
current and power requirements are satisfied.
NOTE
An End Cap Terminator (catalog number 1769-ECR or -ECL) is
needed for any system using Compact expansion I/O.
AB Spares