Optocoupled GPIO have the advantage of being electrically isolated from the rest of the vision system and require external reference through the COMMON_IN and COMMON_OUT wires. The termination of COMMON_IN and COMMON_OUT to an external voltage or ground determines if the input or output is Sinking (also known as NPN) type or Sourcing (also known as PNP) type. The output GPIO performs similarly to switches connecting the GPIO pin to COMMON_OUT. When disabled, the GPIO pin is disconnected from COMMON_OUT and allowed to float. As a result, optocoupled outputs turn on relatively quickly, while the turn-off time is dependent upon how quickly the connected load dissipates charge.
Temperature is actively monitored at critical points within the system. Whenever a safe limit is exceeded the system response may include stopping active jobs. When this condition occurs, the user must take steps to mitigate the overheating condition. Following the mitigation steps, a power cycle of the unit is necessary to resume normal operation.
If overheating is a problem, effective mitigation strategies include:
Using external illumination
Actively cooling with a fan or a panel AC unit
Heatsinking the chassis to a large thermally conductive mounting surface through a thermally conductive mounting system
For optimal performance, ensure that the device does not exceed the recommended operating ranges listed below:
Operating Temperature
Temperature
Operating Range
Ambient Temperature
0°C to 45°C (duty cycle-dependent)
If temperatures exceed the operating range, additional heat-sinking strategies may be necessary. For example, mounting to a metal infrastructure or forced convection via an external fan. Use of the Zebra Universal Mounting Bracket (BRKT-LMNT-U000) provides multiple options to mount to a metal infrastructure.
