Svi Ii Esd Setups - GE Masoneilan SVI II ESD Installation And Maintenance Manual

SVI II ESD Setups

Control systems using Explosion Proof or Conventional I/O Systems must have a compliance
voltage greater than 9 V at 20 mA.
Control systems using Intrinsic Safety methods must have a compliance voltage greater than
17.64 V.
For General Purpose and Explosion Proof (EEx d) Installation Schematic see Figure 81 on
page 173. For intrinsically safe installation schematic see Figure 82 on page 174. The SVI II
ESD positioner can be located in a general-purpose or hazardous area protected by Explosion
Proof (EEx d) methods. Wiring diagrams are generalized, actual wiring must adhere to
Electrical Installation section of manual and local electrical codes. The use of a Hand-held
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Communicator or a HART modem is not permitted in the Hazardous Area protected by
Explosion Proof (EEx d) methods. In Figure 82 on page 174 the SVI II ESD positioner is located in
a 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 input
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signal can carry a HART communication protocol signal from ValVue ESD or other software
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and a HART modem, or from a HART Hand-held Communicator. Since the source of the
input signal from the process control system is located in a non-hazardous location, setup
requires an intrinsic safety barrier be placed between the process control system and the SVI II
ESD. If the SVI II ESD is located in a hazardous area with Intrinsically Safe protection a barrier is
not required for a flameproof installation. Alternatively the system can be installed as
Explosion Proof ⁄ flameproof.
The SVI II ESD can communicate with a remote PC running ValVue ESD software via a
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dedicated 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 the
valve is located in a hazardous area.
The SVI II ESD can be operated, calibrated, configured either by using local pushbutton and
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display, using a remote PC running ValVue ESD software or with the HART Hand-held
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Communicator. The HHC475 HART Hand-held Communicator is approved for Intrinsically
Safe 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. Reversing
polarity will not cause damage but the unit will not function properly.
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