System Manual Modular Systems
3 Product Description
HI 800 191 E Rev. 2.02
Page 21 of 114
The power supply units of HIMatrix systems must comply with the SELV (Safety Extra Low
Voltage) or PELV (Protective Extra Low Voltage) requirements.
Observing the permitted voltage limits guarantees the system's proper operation.
The required SELV/PELV power supply units ensure safe operation.
The device monitors the 24 VDC voltage during operation. Reactions occur in accordance with
the specified voltage level:
Voltage level
Reaction of the device
19.3...28.8 V
Normal operation
< 18.0 V
Alarm states (internal variables are written and provided to the inputs or
outputs)
< 12.0 V
Switching off the inputs and outputs
Table 12: Operating Voltage Monitoring
The
Power Supply State
system variable is used to evaluate the operating voltage state with the
programming tool or from within the user program.
3.3
Monitoring the Temperature State
One or multiple sensors are used to measure the temperature at relevant positions within the
device or system.
If the measured temperature exceeds the defined temperature threshold, the value of the
Temperature State
system variable changes as follows:
Temperature
Temperature range
Temperature State
[BYTE]
< 60 °C
Normal
0x00
60
°C…70 °C
High temperature
0x01
> 70 °C
Very high temperature
0x03
Back to 64 °C...54 °C
1)
High temperature
0x01
Back to < 54 °C
1)
Normal
0x00
1)
The hysteresis of sensors is 6 °C.
Table 13: Temperature Monitoring
If no or insufficient air circulates within a control cabinet and natural convection is not enough,
the threshold associated with
High Temperature
in the HIMatrix controller can already be
exceeded at ambient temperatures of less than 35 °C.
This can be due to local heating or to a bad heat conduction. In particular with digital outputs,
the heat levels strongly depend on their load.
The
Temperature State
system variable allows the user to read the temperature. If the state
Very high temperature
often occurs, HIMA recommends improving the system heat dissipation,
e.g., by taking additional ventilation or cooling measures, such that the long life time of the
HIMatrix systems can be maintained.
i
The safety of the system is not compromised if the state
High Temperature
or
Very High
Temperature
is entered.
3.3.1
Setting the Temperature Threshold for Messages in F*03 Devices
The temperature threshold that, if exceeded, causes a message to be issued can be defined for
each base plate and each compact controller. In the SILworX Hardware Editor, use the detail
view for the base plate or compact controller to configure this setting.
