Table 6-8. I/O Expansion Board (Optional) Connector Pin Descriptions - Thermo Scientific 48i Instruction Manual

Troubleshooting
Connector Pin Descriptions
6-20 Model 48i Trace Level-Enhanced Instruction Manual
Connector Reference
Label Designator
KEYBOARD J3
LCD BACKLIGHT J4
Table 6–8. I/O Expansion Board (Optional) Connector Pin Descriptions
Connector Reference
Label Designator
EXPANSION I/O J1
Pin Signal Description
9 LCLK_5V – LCD Signal
10 +5V
11 Ground
12 -25V
13 LCD Bias Voltage
14 Ground
1 Keypad Row 1 Input
2 Keypad Row 2 Input
3 Keypad Row 3 Input
4 Keypad Row 4 Input
5 Keypad Col 1 Select
6 Keypad Col 2 Select
7 Keypad Col 3 Select
8 Keypad Col 4 Select
1 +5 Supply
2 NC
3 Ground
Pin Signal Description
1 Analog Voltage Input 1
2 Analog Voltage Input 2
3 Analog Voltage Input 3
4 Ground
5 Analog Voltage Input 4
6 Analog Voltage Input 5
7 Analog Voltage Input 6
8 Ground
9 Analog Voltage Input 7
10 Analog Voltage Input 8
11 Ground
12 NC
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