Power supply, Figure 2 power supply, Figure 3 pinout of the header j1203 – BECKHOFF EL9800 Basisplatine User Manual
Page 11: Figure 4 header j1200, Selection of the pdi header voltage, 1 power supply, 3v 5v, J1200
Product overview
EL9800
9
2.1 Power Supply
Figure 2 Power Supply
The EL9800 Base Board has to be supplied with 24V DC (J200). From this voltage all other voltages are
derived (12V, 5V, 3.3V). All these voltages are placed on the header J1203 and therefore available for
customer circuits. Indication of correct function of the DC-DC converters is provided by two LEDs, one for
3.3V, one for 5V.
J1203
24V
12V
5V
3.3V
GND
Figure 3 Pinout of the header J1203
Placing a bridge on the left or right pin pairs header one can choose between 3.3V or 5V on the headers
of the µ-Controller, Digital IO and SPI process data interfaces.
+3.3V 5V
V
CC Header
J1200
Figure 4 Header J1200
– Selection of the PDI header voltage
All process data interface signals have 3.3V CMOS level. Except of the input signals of the PIC-PDI Inter-
face (chapter 2.6) are all input signals 5V tolerant.