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Thermo Fisher Scientific
Connector
Reference
Label
Designator
EXPANSION BD
J2
SPARE DATA
J12
I/O
J5
Pin
Signal Description
5
NC
6
Ethernet Input (-)
7
NC
8
NC
1
+5V
2
+24V
3
+24V
4
Ground
5
Ground
6
Ground
7
+RS485 to Expansion Board
8
-RS485 to Expansion Board
1
+5V
2
+24V
3
+24V
4
Ground
5
Ground
6
Ground
7
+RS485 to Spare Board
8
-RS485 to Spare Board
1
Power Fail Relay N.C. Contact
2
Ground
3
TTL Input 1
4
TTL Input 2
5
Ground
6
TTL Input 5
7
TTL Input 7
8
TTL Input 8
9
TTL Input 10
10
Ground
11
TTL Input 13
12
TTL Input 15
13
Ground
14
Analog Voltage 1
Model 42i Trace Level Instruction Manual
Troubleshooting
Connector Pin Descriptions
6-9
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Troubleshooting
