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The recommended mounting position of the fork for light, free flowing solids, is vertical (top) mounting. Side mounting is recommended only in cases when the fork-tines are easily freed from the process medium. In case of side mounting, NIVOSWITCH must be mounted with the fork-tines standing vertically. When determining mounting location, take into account the possible caving or arching of the material in the tank. The fork should be protected against falling materials. This is to be done so that material could not clog between the fork and the protection plate. R–3–3 R–3–4 4.2. THREE-WIRE DC VERSION In case of overload caused by short circuit, the transistor will switch on and off, and the LED will start to blink. 4.2.1. Connector version R – 3 – 3 (LED) indication 3 "M" - Operation switch H =High level safe 2 M H = High density 1 H L = Low level safe L 4.2.1.1. "D" - Density switch D L H Wiring diagram of the three-wire DC connector version with relay PNP wiring 4. WIRING NPN wiring Terminal block cover can be rotated in 90° steps to ensure appropriate cable positioning. R – 3 – 1 with connector R – 3 – 2 with cable 4.1. TWO-WIRE AC L = Low density 4.2.1.2. Wiring diagram of the three-wire DC connector version with PLC THE UNIT SHOULD NOT BE POWERED UP WITHOUT GROUNDING AND EXTERNAL LOAD! + 24V DC IN PLC COM 4.1.1. Model with connector R – 3 – 1 PNP wiring L1 3 R 2 N 3 R–3–4 4.2.2. Integral cable version R 2 1 4.2.2.1. Wiring with relay N PNP wiring high (H) density (ρ ≥ 0.5 kg/dm3), 1 L1 + brown Wiring of Low fail safe mode (L) brown Wiring of High fail safe mode (H) R black black - blue Terminal block cover can be rotated in 90° steps to ensure appropriate cable positioning. - white white R blue grey grey Junction box + Junction box 4.1.2. Integral cable version R – 3 – 2 Two of the signal wires (black and brown) are insulated. Only one of these two wires is used, depending on the operating mode (High or Low). Remove the insulation only from the wire corresponding to the desired operating mode. brown brown R blue black N L1 green/yellow Junction box Wiring of Low fail safe mode (L) R blue black L1 N Wiring for L (Low fail safe operation) PNP output low (L) density, (ρ < 0.5 kg/dm3) + brown white R black grey Junction box Wiring of High fail safe mode (H) brown - white black - blue green/yellow Wiring for H (High fail safe op.) Junction box Wiring of Low fail safe mode (L) R blue + grey Junction box Wiring of High fail safe mode (H)
