Overview
Temperature
State/Operating
Temperature
The remote output modules are designed to operate with the maximum temperature
of 60oC. The temperature states in single modules and PLCs are evaluated by the CPU module or the remote output device’s CPU for compact systems. The temperature state of a particular module or PLC is measured by a sensor. The sensor monitors the temperature state of the remote output device automatically and continuously.
The following table shows the ranges in which the temperature state signals the measured temperature:
Temperature range | Temperature state |
|
|
< 60°C / 140°F | Normal |
|
|
60°C to 70°C / 140°F to 158°F | High temperature |
|
|
> 70°C / 158°F | Very high temperature |
|
|
Return to 64°C / 147.2°F | High temperature |
|
|
Return to < 54°C / 129.2°F | Normal |
|
|
Note: The difference in temperature increase and decrease ranges is the result of the sensor’s hysteresis that equals 6°C / 10.8°F.
Temperature state High temperature indicates the following:
operating temperature = max temperature (delta T)max + ambient temperature
≥60°C / 140°F.
In this case, support the internal convection by adding air grilles or increasing the free space between the remote output devices.
Temperature state Very high temperature indicates the following:
operating temperature = max temperature (delta T)max + ambient temperature
≥70°C / 158°F.
In this case, support the internal convection by integrating additional active cooling elements (fan, coolant devices, etc.) or increasing the free space around the remote output devices.
If the sensor indicates a temperature increase above the critical threshold, the temperature state changes. The temperature states can be evaluated using the Temperature State system signal of the XPSMFWIN.
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