Контекст:
The relay output offers one isolated NO/NC contact. The actual state of relay output is presented on green LED OPEN (relay on) and red LED CLOSED (relay off). Depending of jumper setting the Relay output can be configured as Momentary or Latch output.

The Momentary output
Once triggered this output switches to on state for time defined by C4C5 parameters. After this time Momentary Output automatically switches back to off state. If during the on state the next control command have been used again the on state will be extended and will be counted anew from the moment when the last command was used.

The Latch output
With every control command this output switches to opposite condition for unlimited time - till moment when next command will switch it back.