ClearOne Converge Pro 840T Specifications Page 178

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User-Definable Pins
The user-definable pins provide control via contact closure, and status via open collector functions in the unit. There
are two user-definable pins on the B port of every unit. The number of user-definable pins on the A port varies by
model, as summarized in the following table:
Model User-Definable Pins
Control/Status Port A
User-Definable Pins
Control/Status Port B
880 16 2
880T 16 2
880TA 16 2
840T 20 2
8i 16 2
TH20 24 2
VH20 24 2
SR 1212 16 2
SR 1212A 16 2
Default Pin Assignments
For default pin assignments for Control/Status ports by model, refer to Appendix B.
Control/Status Ports
Control/Status A and B ports are female DB25 connectors used for General Purpose Input/Output (GPIO)
interactions between CONVERGE/CONVERGE Pro devices and external control devices such as wall switches and
push-to-talk microphones. Control programming enables external control devices and controller software to access
the CONVERGE/CONVERGE Pro serial command set, including common functions such as volume control, muting,
room combining, and running presets.
For more information on Control/Status Port A and B and other physical connections, see Controls and
Connections.
Control/Status Pin Programming
Use the following procedure to program user-definable pins:
1. In the Control/Status Pin Select section of the screen, select port A or B from the Control Port drop-down
list.
2. Select the pin you want to configure from the Selected Pin drop-down list. (Pin 1 is selected by default for
Control Port A and Pin 21 is selected by default for Control Port B.)
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