Matrix Orbital LK202-25 LCD schematic:
* Connector Function *
General Purpose Outputs 2 Status LEDs, optional GPO relay control
GPO1 Green LED System status
GPO2 Red LED EAS Alert status
GPO3-6 available for external GPO relay control
4 pin power LCD power ( 5.0VDC), unused I2C comm.
Pin1 +7 to +15 VDC
Pin2
I2C
SCL
clock
Pin3 I2C SDA data
Pin4
Ground
10 pin keypad header generate 25 key states-optional GPI input
DB-9F RS-232 connection to VIA motherboard COM2 serial port
Pin2
Data
from
LCD
Pin3 Data to LCD
For more details refer to Matrix Orbital Users Manual for LK202-25.
Power
Connector
RS-232
10 pin keypad
header
General
Purpose
outputs
Pin 1
Pin 4
Pin 5
Pin 1
GPO 1
GPO 6
©Digital Alert Systems, LLC 2004
