DG1 Series Overview
PowerXL DG1 Series Option Cards MN040007EN—April 2014 www.eaton.com 7
Power Supply (+24 Vdc Out / +24 Vdc In)
The power supply can only exist on IO1 board, which
includes a 24 Vdc in and a 24 Vdc out.
The 24 Vdc out is used to power up external equipment,
such as encoders and auxiliary relays. Note that the total
combined load on all available 24 Vdc out terminals must not
exceed 250 mA. The maximum load on the 24 Vdc out per
board is 150 mA.
The 24 Vdc in can be connected to an external +24V power
supply to power up the base board and expander boards. If
an external power supply is connected to the 24 Vdc in, the
base board and expander boards remain live even if the utility
power is lost.
Requirements for an external 24V power supply:
●
Output voltage +24 Vdc ±10%, max. ripple voltage
100 mV rms
●
Maximum current 1A
●
1A external fuse (no internal short-circuit protection is
provided on the base board for the external 24V input)
Figure 4. Maximum Loads on +24V / EXT +24V Output
Digital Input Signal Conversion
The active signal level depends on which potential the
common input is connected to. The alternatives are +24V
or Ground (0V).
The 24-volt control voltage and the ground for the digital
inputs and the common input can be from either the internal
+24V supply or an external source.
Two typical input signal connection examples are shown
below, which can be done with external +24V or internal
+24V.
Figure 5. Digital Input Signal Conversion—Positive Logic
Figure 6. Digital Input Signal Conversion—Negative
Logic
You can also use the positive and negative logic connections
with the internal +24V supply.
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