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Appendix B: Trouble Shooting Guide
Linea HS 32k CMOS TDI Cameras
The camera has been designed to protect against accidental application of an incorrect input
supply, up to reasonable limits.
With the following input power issues, the status LED will be OFF:
The camera will protect against the application of voltages above approxi28 V. If
the overvoltage protection threshold is exceeded, then power is turned off to the camera’s
internal circuitry. The power supply must be recycled to recover camera operation. The
input protection circuitry is rated up to an absolute maximum of +30 V. Beyond this
voltage, the camera may be damaged.
The camera will also protect against the accidental application of a reverse input supply up
to a maximum of -30 V. Beyond this voltage, the camera may be damaged.
Causes for Overheating & Power Shut Down
For reliable operation, the camera’s face plate temperature should be kept below +65
°
C and the
internal temperature kept below +70
°
C.
Many applications, such as in clean rooms, cannot tolerate the use of forced air cooling (fans) and
therefore must rely on convection.
The camera’s body has been designed with integrated heat fins to assist with convection cooling.
The fins are sufficient to keep the camera at an acceptable temperature if convection flow is
unimpeded.
The camera also benefits from conducting heat away from the body via the face plate into the lens
extension tubes and camera mount. It is therefore important not to restrict convection airflow
around the camera body, especially the fins and the lens assembly and camera mount. Lowering
the ambient temperature will equally lower the camera’s temperature.
If the camera’s internal temperature e80 °C, then the camera will partially shut down to
protect itself against damage.
Commands can still be sent to the camera to read the temperature, but the image sensor will not
be operational and LVAL in response to line triggers will not be generated.
Additionally, the camera’s power will reduce to approximately 70% of normal operation. If the
camera’s temperature continues to rise, at +90 °C the camera will further reduce it power to
approximately 30% of normal operation and any communication with the camera will not be
possible.
The only means to recover from a thermal shutdown is to turn the camera’s power off. Once the
camera has cooled down, the camera data can be restored by reapplying power to the camera.
