© 2016 General Electric Company. All rights reserved.172 | =GE Oil & GasSVI II ESD SetupsControl systems using Explosion Proof or Conventional I/O Systems must have a compliancevoltage greater than 9 V at 20 mA.Control systems using Intrinsic Safety methods must have a compliance voltage greater than17.64 V.For General Purpose and Explosion Proof (EEx d) Installation Schematic see Figure 81 onpage 173. For intrinsically safe installation schematic see Figure 82 on page 174. The SVI IIESD positioner can be located in a general-purpose or hazardous area protected by ExplosionProof (EEx d) methods. Wiring diagrams are generalized, actual wiring must adhere toElectrical Installation section of manual and local electrical codes. The use of a Hand-heldCommunicator or a HART ® modem is not permitted in the Hazardous Area protected byExplosion Proof (EEx d) methods. In Figure 82 on page 174 the SVI II ESD positioner is located ina hazardous area protected by Intrinsically Safe wiring practices.The SVI II ESD requires an electrical input from a 4 - 20 mA current source. SVI II ESD’s inputsignal can carry a HART® communication protocol signal from ValVue ESD or other softwareand a HART® modem, or from a HART® Hand-held Communicator. Since the source of theinput signal from the process control system is located in a non-hazardous location, setuprequires an intrinsic safety barrier be placed between the process control system and the SVI IIESD. If the SVI II ESD is located in a hazardous area with Intrinsically Safe protection a barrier isnot required for a flameproof installation. Alternatively the system can be installed asExplosion Proof ⁄ flameproof.The SVI II ESD can communicate with a remote PC running ValVue ESD software via adedicated HART® modem connected to PC's serial port. The PC, which is not intrinsically safe,must be connected to the circuit on the safe area side of the intrinsic safety barrier when thevalve is located in a hazardous area.The SVI II ESD can be operated, calibrated, configured either by using local pushbutton anddisplay, using a remote PC running ValVue ESD software or with the HART® Hand-heldCommunicator. The HHC475 HART® Hand-held Communicator is approved for IntrinsicallySafe use in accordance with FM, CSA, and ATEX standards. Read and observe all HHC labeling.The SVI II ESD is polarity sensitive so that the positive lead must be connected to the positive(+) terminal and the negative lead must be connected to the negative (-) terminal. Reversingpolarity will not cause damage but the unit will not function properly.
