32 Chapter 2: Getting started with your Matrox 4Sight EV6 unit
or a sourcing device. When an auxiliary output signal is off, the circuit between
the AUX_OUT+ and AUX_OUT- pins of the signal is opened and no current
flows through.
The exact connection between the output signal, the connected device, and the
power source depends entirely on the type of device to which you connect. You
should essentially connect your device respecting the following:
Important
Notice that the power source must be provided externally.
Depending on whether the auxiliary output signal is attached to a sourcing device
or sinking device, the following can be observed:
Equivalent circuit only
Connecting a sinking device
to a sourcing auxiliary output signal
Connecting a sourcing device
to a sinking auxiliary output signal
Vcc
Sourcing
from Vcc
Sinking
device
AUX_OUTn-
AUX_OUTn+
Sourcing
device
Sinking to
ground
Vcc
AUX_OUTn-
AUX_OUTn+
Connection Observed at
Observed voltage
Signal on
(closed so current can flow from
AUX_OUTn+ to AUX_OUTn- pin)
Signal off
(open so current cannot flow from
AUX_OUTn+ pin to AUX_OUTn- pin)
Sourcing device attached
to AUX_OUTn+ pin
and return path
attached to AUX_OUTn- pin
AUX_OUTn+
pin
Low Floating
(voltage level is imposed
by the sourcing device)
AUX_OUTn-
pin
Low Low
Power source
attached to AUX_OUTn+
pin
and sinking device
attached to AUX_OUTn- pin
AUX_OUTn+
pin
High High
AUX_OUTn-
pin
High Floating
(voltage level is imposed
by the sinking device)
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