Thermo 48i - Page 170

Troubleshooting
Connector Pin Descriptions
6-8 Model 48i Instruction Manual Thermo Electron Corporation
SPARE DATA J4 1 +5V
2 +24V
3 +24V
4 Ground
5 Ground
6 Ground
7 +RS485 to Spare Board
8 -RS485 to Spare Board
I/O J5 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 Output 1
15 Analog Voltage Output 3
16 Ground
17 Analog Voltage Output 5
18 Ground
19 Ground
20 Power Fail Relay COM
21 Power Fail Relay N.O. Contact
22 Ground
23 TTL Input 3
24 TTL Input 4
25 TTL Input 6
Table 6-3. Motherboard Connector Pin Descriptions, continued
Connector
Label
Reference
Designator
Pin Signal
Description