Biamp EX-LOGIC - Manual (Page 5)

5
TESIRA EX-LOGIC REAR PANEL
1 – Grounding pin. This pin is for grounding the chassis of the expander
2 – Ethernet data connection. Uses a standard RJ-45 connector with CAT-5, CAT-5e, CAT-6 or
CAT-7 cabling. The maximum distance between any unit and an Ethernet switch is 328 feet (100
meters). The expander must receive PoE (IEEE 802.3af) power on this connector in order for
proper operation.
This connection is for sending and receiving control data with the Tesira server. The expander will
not operate if it is not on a network that includes a Server-Class Tesira device.
3 – Serial Control port. The serial port can be utilized to send a control string to another device.
4 – Connections 1-12. These GPIO connections can be used as either inputs or outputs. They can
be assigned to actions within the software using Logic Input and Logic Output blocks.
When configured as logic output, each of the 16 GPIO pins can be configured to enable a current
source capable of driving an LED. The current source is enabled depending on the state of the logic
output block.
5 – Connections 13–16. These connections can function in the same way as connections 1-12
for digital GPIO. But they can also be assigned as variable voltage input controls to allow analog
control within the Tesira system by connection to a potentiometer.
GPIO pins 13–16 can be configured individually by the Control Voltage block in the software. If
any one of these is configured for voltage control, then the logic expander will turn on the 5V
potentiometer power.
Voltage Control Calibration
The four analog GPIO pins support voltage control calibration because a potentiometer may not be
able to achieve the full range of voltage expected by the internal analog/digital convertors. When
calibrated, the logic expander records both the minimum and maximum voltage levels caused by
the potentiometer to achieve the full range of voltage. A 10K Linear Potentiometer or similar value
is suggested.
1
2 3 4 5