Dc Power Source Connections; Dc Input Wiring To Ac/Dc And Dc-Only Power Supplies; Vdc Output (All Supplies) - GE 90-30 PLC Series Installation And Hardware Manual

DC Power Source Connections

DC Input Wiring to AC/DC and DC-Only Power Supplies

DC Input power can range from 12 to 30 VDC for the 24 VDC supply, 18 to 56 VDC for the 24/48
VDC supply or 100 to 150 VDC for the 125 VDC supply. All Series 90-30 power supplies have
DC input capabilities. The following connection information applies to all of them:
Connect the + and - wires from the power source to the top terminals on the terminal board (+ to
the top terminal, - to the second terminal). Connect the third terminal from the top to system
ground.

+24 VDC Output (All Supplies)

The bottom two terminals are connected to the isolated 24 volt DC output that can be used to
supply power to input circuits (within power limitations of the supply).
GFK-0356Q Chapter 2 Installation
If the same DC input power source is used to provide power to two or more
power supplies in a Series 90-30 PLC System, ensure that connection
polarity is identical at each rack (top terminal + and second terminal -). Do
not cross the Positive (+) and Negative (-) lines. A resulting difference in
potential can injure personnel or cause damage to equipment. Also, each
baseplate must be connected to a common system ground, described earlier
in this chapter.
Warning
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