Owner's Manual

Various Procedures
MTX3 Owner’s Manual
18
GPI (General Purpose Interface) devices can be connected to
the rear-panel [GPI] connectors. GPI allows a variety of control
signals to be exchanged with external controllers or other
devices.
The MTX3 provides 8 input ports and 4 output ports.
• The +5VDC terminals have an output voltage of 5V. The
maximum current draw is 100 mA total for the two termi-
nals. If you are using a switch/variable resistor and an LED/
relay simultaneously, connect one terminal to the switch/
variable resistor and the other terminal to the LED/relay.
• The [IN]-1–7 terminals detect voltage changes from 0V to
5V. The [IN]-8 terminal alone supports +24V input; volt-
ages in the range of 2.5–24V are detected as High, and volt-
ages below 2.5V are detected as Low.
• The [OUT]-1–4 terminals are open collector outputs; they
will change between open or closed (Ground). The maxi-
mum voltage that can be applied is +12V. The maximum
current draw is 75 mA per port.
The GPI controller parameters are assigned via the MTX-MRX
Editor application.
Euroblock plugs (16-pin) are used for connections to the [GPI]
connector. For details, refer to “Euroblock plug connection” on
page 12.
• Connection examples using the [GPI IN] con-
nector
• Connection examples using the [GPI OUT]
connector
Connecting via the [GPI] connector
NOTE
By making input/output channel settings in MTX-MRX Editor,
you can recall presets or edit parameters on an external GPI
device or send signals to it. For details, refer to the “MTX-MRX
Editor User Guide.”
Example: Controlling the MTX3 from a switch box
Example: Controlling the MTX3 with a 10k ohm
linear taper potentiometer.
Example: Lighting LED indicators on external
devices from the MTX3
Example: Lighting an LED by switching an exter-
nal device’s relay from the MTX3
NOTE
For the method of adjusting the detection range of the input
voltage at the [GPI] connector (calibration), refer to the “MTX-
MRX Editor User Guide.”
IN
+V
+5VDC
A/D
CPU
100k
MTX3
Variable
resistor
IN
+V
+5VDC
GND
A/D
CPU
100k
MTX3
OUT
+V
+5VDC
CPU
10
MTX3
Max. 75mA
CAUTION
Do not exceed 75 mA of current from the OUT con-
nector.
OUT
+V
+
–
+5VDC
CPU
10
MTX3
Max. 75mA