Power supply
Notice | |
Damage to the Embedded PCs The Embedded PCs may be damaged during wiring.
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The power supply terminals require an external voltage source, which provides 24 V DC (-15% / +20%). The power supply terminal must provide 4 A at 24 V, in order to ensure the operation of the Embedded PCs in all situations.
The cabling of the Embedded PC in the control cabinet must be done in accordance with the standard EN 60204-1:2006 PELV = Protective Extra Low Voltage:
- The "PE" and "0 V" conductors of the voltage source for a basic CPU module must be on the same potential (connected in the control cabinet).
- Standard EN 60204-1:2006, section 6.4.1:b stipulates that one side of the circuit, or a point of the energy source for this circuit must be connected to the protective earth conductor system.
Connections
No. | Description |
|---|---|
1 | The upper spring-loaded terminals (Us) identified with "24 V" and "0 V" supply the Embedded PC and the terminal bus (data transfer via K-bus or E-bus). |
2 | The spring-loaded terminals (Up) identified as "+", "-" and "PE" supply the Bus Terminals via the power contacts and the sensors or actuators connected to the Bus Terminals. |
Fuse
- When dimensioning the fuse for the system voltage (Us), observe the maximum power consumption of the Embedded PC (see: Technical data)
- Protect the power contacts (Up) with a fuse with a max. rating of 10 A (slow-blow).
Interrupting / switching off the power supply
To switch off the Embedded PC, do not disconnect the ground (0 V), because otherwise current may continue to flow via the shielding, depending on the device, and damage the Embedded PC or peripheral devices.
Always disconnect the 24 V line. Devices connected to the Embedded PC, which have their own power supply (e.g. a Panel) must have the same potential for "PE" and "0 V" as the Embedded PC have (no potential difference).