Matrix Orbital GLK12232-25-WBL - Manual (Page 9)

Figure 2: Electrical Connections
All connections are made via a 25 pin in-line connector area near the bottom edge of the PCB. Pin
descriptions are as follows;
Table 1: Pin Descriptions
Pin Marked Function Pin Marked Function
1 Yellow do not use 14 C1 Keypad column 1
2 Black ground 15 C2 Keypad column 2
3 Black ground 16 C3 Keypad column 3
4 Red +5V power input 17 C4 Keypad column 4
5 SCL I 2 C clock 18 C5 Keypad column 5
6 SDA I 2 C data 19 R1 Keypad row 1
7 GND ground 20 R2 Keypad row 2
8 Rx RS-232 receive data 21 R3 Keypad row 3
9 Tx RS-232 transmit data 22 R4 Keypad row 4
10 +5V +5V power input 23 R5 Keypad row 5
11 G1 General purpose output 1 24 Rst do not use
12 G2 General purpose output 2 25 Cont do not use
13 GND ground for GPOs
Matrix Orbital GLK12232-25-WBL 5