External Device Power/Signal Voltage Configuration; Signal Voltage Select Jumpers; Power Voltage Select Jumpers; Vmx-Pi I/O Signal/Logic Levels - Kauai Labs VMX-pi Reference Manual

VMX-pi Hardware Reference Manual (version 1.10)

External Device Power/Signal Voltage Configuration

VMX-pi provides flexibility in the voltage used to power and exchange signals with External Devices.
Several onboard jumpers allow various configurations to address many system configurations, typically
eliminating the need for external voltage translation devices.
High Current
DIO Power/
Signal
Voltage
Select
Analog Input
Power
Voltage
Select
Figure 6 VMX-pi Signal/Power Voltage Select Jumpers

Signal Voltage Select Jumpers

Either 5 or 3.3V output signal levels may be selected for High Current and Comm DIOs.
Note 1: Flex DIOs are fixed at 3.3V output levels.
Note 2: All inputs are tolerant of higher voltages, see Table 5 below.

Power Voltage Select Jumpers

Either 5 or 3.3V power output for external devices may be selected for Flex, High Current and Comm
DIOs and also for power pins on the Analog Input block

VMX-pi I/O Signal/Logic Levels

VMX-pi Analog and Digital I/O channels are designed to support nominal signal levels in both 3.3V and
5V systems, and also include circuit protection circuitry to handle cases when input signal levels exceed
the expected range.
COMM/DIO
Power/Signal
Voltage
Select
FlexDIO
Power
Voltage
Select
16