Vacon NX Active Front End User Manual

Contents

4vacon • 28 Active Front End (AFE)Tel. +358 (0) 201 2121 • Fax +358 (0)201 212 205Figure 15. Optical cable terminals in the unit (FI13 example)NOTE! The minimum fibre cable bending radius is 50 mm.NOTE! Terminals X2 and X3 can be in use simultaneously. However, if the +24 V supply from thecontrol I/O terminals (e.g. from board OPT-A1) is used, this terminal must be protected with a diode.4.7.2 LCL wiring diagramThe LCL filter contains a choke on the mains side, capacitors and a choke on the AFE side,Figure 16. The LCL also includes capacitors connected against ground potential. There areresistors connected across the capacitors for discharging them when the LCL filter is disconnectedfrom the input power. The discharging resistors are 10 MΩ, 500 V and 0,5 W.Optical terminals on adapter boardH1 Gate control enableH2 Phase U controlH3 Phase V controlH4 Phase W controlH5 ADC synchronizationH6 VaconBus data from control board to ASICH7 VaconBus data from ASIC to control boardOther terminals on adapter boardX1 Control board connectionX2 Supply voltage 24 V in (from power unit ASIC)X3Supply voltage 24 V in (customer);• Max. current 1A• Terminal #1: +• Terminal #2: –