Chapter 1: Getting Started
DL05/06 Option Modules User Manual; 7th Ed. Rev. C
1–6
Module LED Indicator
Most discrete I/O Option modules have an LED indicator. The indicator flickers or stays
constant while the CPU is accessing the module, whether in program mode or run mode. It
is not a diagnostics indicator, therefore the on status is not an indication the I/O module is
functioning properly.
Power Budgeting
The DL06 has four option card slots. To determine whether the combination of cards you
select will have sufficient power, you will need to perform a power budget calculation.
Power supplied
Power is supplied from two sources, the internal base unit power supply and, if required, an
external supply (customer furnished). The D0-06xx (AC powered) PLCs supply a limited
amount of 24VDC power. The 24VDC output can be used to power external devices. For
power budgeting, start by considering the power supplied by the base unit. All DL06 PLCs
supply the same amount of 5VDC power. Only the AC units offer 24VDC auxiliary power.
Be aware of the trade-off between 5VDC power and 24VDC power. The amount of 5VDC
power available depends on the amount of 24VDC power being used, and the amount of
24VDC power available depends on the amount of 5VDC power consumed. Determine the
amount of internally supplied power from the table on the following page.
Power required by base unit
Because of the different I/O configurations available in the DL06 family, the power
consumed by the base unit itself varies from model to model. Subtract the amount of power
required by the base unit from the amount of power supplied by the base unit. Be sure to
subtract 5VDC and 24VDC amounts.
Power required by option cards
Next, subtract the amount of power required by the option cards you are planning to use.
Again, remember to subtract both 5VDC and 24VDC. If your power budget analysis shows
surplus power available, you should have a workable configuration.
