ES220 & ES220-L
Ethernet Audio Bridges
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APPENDIX D:
GPIO CONNECTOR
ES220 and ES220-L have four TTL 5 V compatible GPIs and four open
collector GPOs. GPIs allow defining statuses read by the EtherSound
configuration software, GPOs can be used by the EtherSound configuration
software for remote control of external devices.
General Purpose Inputs (GPIs)
Schematic diagrams show the particular design for each GPI. The GPI status
can be either 1 (=ON) or 0 (=OFF). It is read at “0” as soon as the system
connected to GPI provides a tension higher than 2.5 V without ever exceeding
5 V. Otherwise, GPI is read at “1”.
Note:
Pin 1 deli5 V electric potential and pin 6 being connected to ground
(0 V), they have to be used in the configuration of the GPIs.
GPI
GPI status
General Purpose Outputs (GPOs)
The ES220(-L) GPOs are “open collector” outputs. They use the same
reference for 0 V and the same protection reference. The protection reference
must be connected to the highest potential that may ever be connected to
GPOs.
The GPOs respond to commands of the configuration and management
software sent by the Primary Master. If written at “1”, the GPO closes the
linked open collector. If written at “0”, the GPO opens the linked open
collector.
Note:
Pin 6 being connected to ground (0 V) and pin 11 being used as protection
reference for the GPOs, they have to be used in the configuration of the GPOs.
GPO command
GPO status
Protection reference
