TTL Outputs

18 Transistor–transistor logic (TTL) outputs are available on MASSO controller, these outputs can be assigned different functions in the MASSO setup screen, please see this link CLICK HERE


  • These outputs are designed to be interfaced to other electronics for low current signals. The maximum allowed current load on each output is 5 (mA).
  • For controlling things such as actuators, motors or relays please use a driver/amplifier board or the MASSO Relay module which is designed to work with these outputs.
  • MASSO G3 outputs will provide a 5 volt signal when the output goes high and 0 volts when the output goes low. The output is reversed if you invert the output in the F1 screen.
  • MASSO G3 outputs have built in protection that prevent the output from sinking current.



To control high load electronics use the MASSO relay module CLICK HERE

CAUTION: Connecting high current devices such as motors or relays to these outputs will damage the controller.


CAUTION: Do not use cheap relay modules as they are known to feed back voltages into MASSO and completely destroying the controller.


INFORMATION: All output signals can be easily inverted by selecting the input in the OUTPUTS list and pressing the space-bar key on the keyboard to invert the input signal. These settings are automatically saved.