Global Valves - BELIMO - #28

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ENG-93001-93621-08.04-1M • Printed in Switzerland • ZSD • Subject to technical modifications BC 28 Wiring diagrams of NVF.. The actuator spindle moves to the end stop if the power supply is interrupted. In the case of the NVF24-MFT(2)-T type, the actuator spindle retracts into the actuator housing (pulling). In the case of the NVF24-MFT(2)-T type, the actuator spindle extends from the actuator housing (pushing). The valve has either an NO (open when deenergized) or NC (closed when deenergized) function depending on its design (closing point up or down). Wiring diagram of NVF24-MFT, NVF24-MFT-E T ~ AC 24 V - + DC 24 V ~ Y2 T- + 1 2 3 4 5 YZ NVF24-MFT s Y (DC 0...10 V) U5 (DC 2...10 V) NVF24-MFT-E ! U Symbols "Direct" signal "Inverted" signal Closing point "up" Closing point "down" Relay contact s Meas. signal min. (e.g. U = 2 V) Meas. signal max. (e.g. U = 10 V) Actuator spindle moves "Override" stroke direction Valve closing point S3.1 S3.2 NVF24-MFT(2)-T NVF24-MFT(2)-E-T 1) 1) 1) 0 k k RETRACTING 1) 1) 1) 0 k k EXTENDING Connection via safety isolating transformer Emergency control function (optional with feedback U5) from controller 1) The position of the slide switch has no influence on the emergency control direction k) No measuring voltages can be determined in the deenergized state Influence of the actuator spindle on different valves (closing point selection) Valve Valve closing point Closing point setting of linear actuator Actuator spindle retracts Actuator spindle extends Up Ä Valve control path closing (0% flow) Valve control path opening (100% flow) Down �Þ Valve control path opening (100% flow) Valve control path closing (0% flow) Up Ä Valve control path closing (0% flow), bypass 100% open Valve control path opening (100% flow), bypass 0% closed