I'm investigating integrating a PLC into a scientific instrument that hangs off the wing of an aircraft. The PLC would control 6 heaters (using PID logic), control power to several components, report back various housekeeping data to the aircraft data system and act as a central point of contact to control the other components in the probe.
The biggest constraint I'm facing is that we want this unit to be fairly vibration and moisture resistant and function down in the -10 to -20 range (or lower). The board will be actively heated, but we don't want to ignore the possibility that the probe loses power in flight and chills down before regaining it.
I'm currently looking at the following units:
omega:
HE-XE and HE-XT series (http://www.omega.com/pptst/OCSXL_Series.html)
Triangle research:
FMD88-10 (http://www.tri-plc.com/fmd88-10.htm)
does anyone have experience with these units, or with another uni they would recommend for this type of application?
The biggest constraint I'm facing is that we want this unit to be fairly vibration and moisture resistant and function down in the -10 to -20 range (or lower). The board will be actively heated, but we don't want to ignore the possibility that the probe loses power in flight and chills down before regaining it.
I'm currently looking at the following units:
omega:
HE-XE and HE-XT series (http://www.omega.com/pptst/OCSXL_Series.html)
Triangle research:
FMD88-10 (http://www.tri-plc.com/fmd88-10.htm)
does anyone have experience with these units, or with another uni they would recommend for this type of application?
