MS9400 HD FrEND User Guide Chapter 7: Using the GPIO Control Interface
46 Rev. 1.50
Chapter 7: Using the GPIO Control Interface
GPIO Physical Interface
Back view of the MS9400 with the GPIO Interface installed:
The GPIO Control Interface offers opto-isolated inputs and relay change-over outputs that can be controlled via
third party show-control software, ESCAN or directly from the MS9400.
The Control Interface features:
§ Four Opto-Isolated inputs (each with a corresponding status LED) can be configured to provide triggers
to either an external show-control system or the MS9400 directly. The four opto-isolated inputs can also
be assigned to individual soft functions; these soft functions are assigned to macro files (.mac),
which can be programmed to issue any command supported by the MS9400 control protocol.
§ Four Digital outputs (each with a corresponding status LED), each driving low current change-over relays
capable of switching up to 1A at 24VDC.
§ 5VDC Power Supply to facilitate the I/O switch functioning.
Opto-Isolated Digital Inputs
The digital input connections consist of a bank of screw terminal connectors with separate 3.5mm removable
terminal blocks for ease of wiring. Each input is assigned two terminals indicated by a ‘+’ and ‘-‘ symbol.
Because each input is opto-isolated both connections must be used to ensure the correct operation of the input
circuit.
The MS9400 GPIO utilizes four (4) digital input connection channels.
