The MIDI Solutions Relay contains a relay that can be programmed to open or close in response to MIDI events (for eight relays in a single rack space unit, see the MIDI Solutions R8).
Event types are programmable and include: Note, control change, program change and system exclusive.
A fast reed relay is used for a response time of less than 2ms. Relay contact is rated at 500 mA. Contacts are made available via connection to the tip and sleeve of a 1/4" mono phone jack.
The Relay is programmed by sending it MIDI System Exclusive messages (see FAQs - Programming). This can be done easily with the Processors Programming Tools software. Once programmed, its settings are retained even after power is removed. The Relay can be reprogrammed with new settings as often as needed.
The Relay is MIDI-powered, and requires no batteries or power supply to operate with most products (see FAQs - Power for more information). A MIDI indicator LED lights up when the product is powered and flashes when MIDI data passes through it.