Thermo Scientific Thermo Scientific Vanquish VC-D40, Operating Manual

Page: 166 / 174

11 • Appendix
Page 166 Variable Wavelength Detectors (VC-D40, VF-D40)
Operating Manual
11.3 Digital I/O
The digital I/O ports (Dig I/O) can be used to exchange digital signals
with external devices. Each port provides:
• one digital input
• one relay output
Pin Assignment
Figure 33: Digital I/O port
Pin Description
1 Not used
2 Relay output — Relay_NC (Normally Closed contact)
3 Ground — GND
4 Digital input — Input
5 Relay output — Relay_COM
COM is the common contact for NO and NC. If the relay is not activated or if
the device is turned off, the connection is between COM and NC. If the relay
is activated, the connection is between COM and NO.
6 Relay output — Relay_NO (Normally Open contact)
The next table lists the functions assigned to the connector pins and the
color of the cable wire connected to each pin.
Pin Wire Color Signal Name Signal Level Remarks
1 Pink Not used
2 Gray Relay output
— Relay_NC Potential free
0-24 V, 0-100 mA Opening contact
3 Green Ground —
GND Ground Reference potential