Digital I/O Terminals Pin Assignment - Thermo Scientific Corona Veo Operating Manual

11 • Appendix

11.2 Digital I/O Terminals Pin Assignment

Digital I/O Terminal A
Digital I/O Terminal B
Page 252
The detector is equipped with two I/O terminals that include 7
connection ports (4 TTL inputs and 3 relay outputs):
Pin Signal Name
1 CC1+
2 CC1-
3 GND
4 CC2+
5 CC2-
6 GND
7 Divert+
8 Divert-
9 GND
Pin Signal Name
1 Pump Off+
2 Pump Off-
3 GND
4 Gas Off+
5 Gas Off-
6 GND
7 Autozero+
8 Autozero-
9 GND
10 Start+
11 Start-
12 GND
Charged Aerosol Detectors Corona Veo (RS) Operating Manual
Signal Level Remark
Relay output Positive polarity
Relay output Negative polarity
Ground
Relay output Positive polarity
Relay output Negative polarity
Ground
TTL input Positive polarity
TTL input Negative polarity
Ground
Signal Level Remark
Relay output Positive polarity
Relay output Negative polarity
Ground
Relay output Positive polarity
Relay output Negative polarity
Ground
TTL input Positive polarity
TTL input Negative polarity
Ground
TTL input Positive polarity
TTL input Negative polarity
Ground