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Chapter 7: using the gpio control interface – Extron Electronics MS9400 HD FrEND User Manual

Page 45

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MS9400 HD FrEND User Guide

Chapter 7: Using the GPIO Interface

45 Rev.

1.54


Chapter 7: Using the GPIO Control Interface

GPIO Physical Interface

Back view of the MS9400 GPIO Interface:

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:

ƒ 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.

ƒ Four Digital outputs (each with a corresponding status LED), each driving low current change-over relays

capable of switching up to 1A at 24VDC.

ƒ 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.

Input Circuit Wiring Configuration

The opto-isolated input circuits provide for various connection scenarios, two common methods follow: