points in a large building could differ, ensure that
there are no other ground connections along the
three-wire bus/power cable in order to avoid the
risk of high ground currents which could lead to
disturbances or malfunction.
However, if R30 Bus Expanders are used that
provide galvanic isolation between the bus
sections, the outgoing AC/DC ground wire from the
R30 (secondary side) should be grounded.
Digital Inputs
The four inputs are intended to be connected to
open/close switches. See page 1 for a functional
description.
Digital Outputs
There are four relay outputs on the MIDI SMOKE
2. Their breaking capacity is 1 A at 30 V AC/DC.
They are normally closed and opens during alarm
conditions. See page 1 for a functional description.
Ethernet
Ethernet is connected to the module thru the RJ-45
connector on the upper side of the module and is
used for Modbus TCP or SioxNet communi-
cations.
Loading of SMOKE EDIT configurations are also
done using the Ethernet connection.
The picture on the next page shows the electrical
connections for the MIDI SMOKE 2.
Profcon AB
Page 17
www.smokecontrol.net
