Matrox 4Sight EV6 Installation And Hardware Reference page 32

32 Chapter 2: Getting started with your Matrox 4Sight EV6 unit
Important
Connection
Sourcing device attached
to AUX_OUTn+ pin
and return path
attached to AUX_OUTn- pin
Power source
attached to AUX_OUTn+
pin
and sinking device
attached to AUX_OUTn- pin
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:
Vcc
AUX_OUTn+
AUX_OUTn-
Sinking to
ground
Connecting a sourcing device
to a sinking auxiliary output signal
Equivalent circuit only
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:
Observed at
(closed so current can flow from
AUX_OUTn+ to AUX_OUTn- pin)
AUX_OUTn+
pin
AUX_OUTn-
pin
AUX_OUTn+
pin
AUX_OUTn-
pin
AUX_OUTn+
Sourcing
device
AUX_OUTn-
Sourcing
from Vcc
Connecting a sinking device
to a sourcing auxiliary output signal
Observed voltage
Signal on
Low
Low
High
High
Vcc
Sinking
device
Signal off
(open so current cannot flow from
AUX_OUTn+ pin to AUX_OUTn- pin)
Floating
(voltage level is imposed
by the sourcing device)
Low
High
Floating
(voltage level is imposed
by the sinking device)