Thermo Scientific thermoscientific Vanquish Pumps C, Operating Manual

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13 • Appendix
Page 288 Pumps C, Pumps F ( VC-Pxx, VF-Pxx)
Operating Manual
13.2 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
• one bidirectional input/output
Pin Assignment
Figure 83: Digital I/O port
Pin Description
1 Bidirectional input/output
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 Input/output Input (low active):
On: 0-0.4 V
Off: 2.2-5 V
Open Collector Output:
0-5 V, 0-2 mA
Pull-up resistor: 47 kΩ to 5 V
Configure as either input or output.
Reference potential is ground. Note
the following:
• The maximum input voltage at the
input must not 5 V with
reference to ground.
• The minimum input voltage must
not be lower than the ground
potential.
2 Gray Relay output
— Relay_NC Potential free
0-24 V, 0-100 mA Opening contact