Beckhoff CX20 2 Series, Руководство пользователя

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Commissioning
CX20x2 38 Version: 1.7
The cables of an external voltage source are connected to the power supply unit with spring-loaded
terminals.
Table 26: Required wire cross-sections and strip lengths.
Conductor cross-section 0,5 ... 2,5 mm
2
AWG 20 ... AWG 14
Strip length 8 ... 9 mm 0.33 inch
Connect the Embedded PC as follows:
1. Open a spring-loaded terminal by slightly pushing with a screwdriver or a rod into the square opening
above the terminal.
2. The wire can now be inserted into the round terminal opening without any force.
3. The terminal closes automatically when the pressure is released, holding the wire safely and
permanently.
The voltage source has been connected to the power supply unit
successfully when the two upper power supply terminal LEDs light up in
green.
• The left LED (Us) indicates the supply of the basic CPU module and
terminal bus.
• The red LED (Up) indicates the Bus Terminal supply via the power
contacts.
NOTE
Interrupting / switching off the power supply
To switch off the Embedded PC, do not disconnect the ground (0 V), because otherwise current may con-
tinue to flow via the shielding, depending on the device, and damage the Embedded PC or peripheral de-
vices.
• 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).