GE BAKER HUGHES Masoneilan SVi 1000 Quick Start Manual

© 2019 Baker Hughes, a GE company, LLC. All rights reserved.62 | =BHGEOptional Retransmit OutputIntroductionThe SVi1000 supports a 4-20mA Position Retransmit Feedback option. The retransmit output re-quires a DC power source (10V~30V) to properly function. The signal could be input into a DCS/PLC analog input module to read out the current valve position.The output terminals are polarity sensitive and must be connected only to a DC circuit. The Re-transmit (+) terminal must be electrically positive with respect to the (–) terminal.In normal working conditions, the retransmit output follows the valve position by outputting a 4-20mA analog signal. If the positioner stops working due to lose of loop power or malfunctioning,the retransmit output stays at around 3.2 mA.This section discusses the necessary precautions when configuring a system.An incorrect polarity connection will result in devicenot properly functioning or with internal circuitrydamage.Consult with qualified personnel to ensure thatelectrical requirements for the switch are met.The external series resistor is normally located in a DCS/PLC analog input module, so that thevalve position (current) can be transferred into voltage (Figure 35).Figure 35 Simplified Retransmit Option Installation DrawingCAUTIONCAUTIONSVi1000 SwitchRetransmitExternalVoltageSource:10 V to 30 V4 - 20 mA current flow