Digital Output / Power Supply Board - GE LPS-O Instruction Manual

3.3 PRINTED CIRCUIT BOARD MODULES
The Digital Outputs (which are programmable) and power supply circuitry are contained on this board. The
logic to select and write a digital output is also located on this board.
Figure 3–9 is a block diagram of the Digital Output/Power Supply board.
3
DATA
+12VISO +5VISO
Figure 3–9: BLOCK DIAGRAM OF THE DIGITAL OUPUT / POWER SUPPLY
3-
12
+5V
POWER SUPPLY
LPS-O Line Protection System
3 HARDWARE DESCRIPTION

3.3.8 DIGITAL OUTPUT / POWER SUPPLY BOARD

TRIP
RELAY
RELAY
LATCH
RELAY
LATCH
+12V ±12VANA
5 V 20 mA
CHANNEL INTERFACE
+5V
GE Power Management