AFRISO SonarFox UST 20, Руководство по эксплуатации

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13 AFRISO SonarFox UST 20
6 . Electrical connection
DANGER
ELECTRIC SHOCK
• Verify that the degree of protection against electric shock (protection class, double insulation)
is not reduced by the type of electrical installation.
Failure to follow these instructions will result in death or serious injury.
DANGER
ELECTRIC SHOCK CAUSED BY LIVE PARTS
• Disconnect the mains voltage supply before performing the work and ensure that it cannot be
switched on.
• Verify that no hazards can be caused by electrically conductive objects or media.
•
Products in the Ex area must be earthed.
Failure to follow these instructions will result in death or serious injury.
The product is connected to the downstream device (evaluation device) with a standard two-core
cable (2 x 0.5 ... 0.75 mm²) without shielding.
1. Use 2 pc. 2 × 0,25 mm² (twisted double-circuit line, shielded) for versions with Modbus commu-
nication.
If the product is connected to the RS-485 line as a terminal device with Modbus communication,
the installation of a terminating resistor 120 Ω is recommended. Set the lever labeled 120 Ω to the
ON position. Terminating resistors are not connected for products that are connected to the RS-
485 line as continuous devices.
Connect cable to the product
1. Unscrew the nut of the upper transparent lid.
2. Take the upper edge of the display module and take it out carefully by mild swinging up.
- If you cannot grasp the module, you can use a small screwdriver. Insert it as far as the
seam and use from several sides to slightly lift the module.
3. Loosen the cable gland and lead the cable through the cable gland under the display module.
4. Connect the phase to the + terminal and the neutral conductor to the - termina.
5. In the case of shielded cables, connect the shield to the ground terminal.
6. Connect communication lines A and B of the RS-485 line (for version "M" - Modbus) to termi-
nals A and B.
7. Tighten the terminals and the cable gland.
- For tightening torque, see technical parameters.
8. Insert the display module back into the head so that the connector is properly connected.
9. Slide silicone seal on the thread of the level meter body.
10. Tighten the nut of the upper lid
11. Connect the cable to downstream devices