Power Supply Overvoltage Protection Devices - GE 90-30 PLC Series Installation And Hardware Manual

2
Figure 2-15. Power Supply Terminal Boards

Power Supply Overvoltage Protection Devices

The overvoltage protection devices for this power supply are connected internally to pin 4 on the
user terminal board. This pin is normally connected to frame ground (pin 3) with the supplied
jumper strap which is installed at the factory. If overvoltage protection is not required or is
supplied upstream, this feature can be disabled by leaving pin 4 unconnected by removing the
jumper strap. Also, this jumper must be removed and external surge suppressors installed in
installations with a "Floating Neutral" input, please see the following section "Special Instructions
for Floating Neutral (IT) Systems" later in this chapter.
If you want to Hi-pot test this supply, overvoltage protection must be disabled during the test by
removing the terminal board strap. Re-enable overvoltage protection after testing by reinstalling
the strap.
Figure 2-16. Overvoltage Protection Devices and Jumper Strap
2-24 Series 90-30 PLC Installation and Hardware Manual – August 2002
Input Power
Factory Jumper
24 VDC Output
For I/O Modules
Six-Terminal Board
Jumper Strap Connects
Overvoltage Protection
Devices to Frame Ground
Screw Terminals on Terminal Board
INPUT
100-240 VAC
50/60HZ 90VA
Input Power
125 VDC, 50W
24 VDC Output
For I/O Modules
+
24 VDC
OUTPUT
0.8A MAX.
Five-Terminal Board
1
2
3
4
INPUT
100-240 VAC
50/60HZ 90VA
125 VDC, 50W
+
24 VDC
OUTPUT
0.8A MAX.
a47086
Frame Ground
GFK-0356Q