Baker Hughes Masoneilan SVI II ESD Quick Start Manual page 46

Powering Up the DSD Configuration
The DSD, or Discrete Safety Demand, configuration uses a 24 VDC power source. To power up
the DSD configuration of the SVI II ESD:
1. Loosen the four (4) cover screws and remove the cover of the SVI II ESD.
2. Connect the +⁄- terminals of the 24 VDC power source to the 24 VDC ESD IN
connector (on the terminal board). The voltage + must connect to the terminal
board connector +, and the same for -. See Figure 16 on page 49.
3. Reinstall the cover and display.
4. Turn on the voltage source. On initial power up, of a newly installed SVI II ESD, the
positioner runs in SETUP mode using the default instrument parameters installed
at the factory. Once calibrated and configured and set to NORMAL, the positioner
cycles through the NORMAL cycle menu and the following values appear:
5. Proceed to "Configuration" on page 62 and "Calibration" on page 66.
Powering Up the A/DSD Configuration
The A/DSD, or Analog/Discrete Safety Demand, configuration uses both a 4 - 20 mA current
source (for the unit) and a 24 VDC source (for the safety trip) for power.
CAUTION
To power up the SVI II ESD:
1. Loosen the four (4) cover screws and remove the cover of the SVI II ESD.
2. Connect the +⁄- terminals of the current source to the 4 - 20mA IN connector (on
the terminal board). The current source + must connect to the terminal board
connector +, and the same for -. See Figure 14 on page 42.
3. Reinstall the cover and display.
4. Adjust the current to 20 mA.
5. Connect the +⁄- terminals of the 24 VDC power source to the 24 VDC ESD IN
connector (on the terminal board). The voltage source + must connect to the
terminal board connector +, and the same for -. Figure 17 on page 50.
6. Reinstall the cover and display.
46 | =BHGE
PRES: Pressure - unit of measurement and value
SIGNAL
POS (Position) 
An exclamation point (!) appears in the display's top left corner to indicate
that further instrument status is available.
Use of a low impedance voltage source damages the SVI II ESD.
The current source must be a true high impedance current
limiting device. A proper current source explicitly enables
adjustment of the current in mA, not Volts.
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