Masoneilan SVI II AP Installation and Maintenance ... - GE Energy
Masoneilan SVI II AP Installation and Maintenance ... - GE Energy
Masoneilan SVI II AP Installation and Maintenance ... - GE Energy
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Inductive Load<br />
Operation <strong>and</strong> <strong>Maintenance</strong><br />
Switch Settings<br />
The two digital output switches can be opened or closed in response to conditions that<br />
the <strong>SVI</strong> <strong>II</strong> <strong>AP</strong> detects. These conditions are:<br />
0. Always Normal Position - the switch is not controlled by the <strong>SVI</strong><br />
<strong>II</strong> <strong>AP</strong> <strong>and</strong> remains in its default position<br />
1. Failsafe - the switch is activated when the <strong>SVI</strong> <strong>II</strong> <strong>AP</strong> is in failsafe<br />
mode<br />
2. Reset - the switch is activated whenever a reset has occurred<br />
<strong>and</strong> the switch remains activated until the <strong>SVI</strong> <strong>II</strong> <strong>AP</strong> status is<br />
cleared<br />
3. Position Error - the switch is activated whenever a position error<br />
has occurred <strong>and</strong> is deactivated when the position recovers to<br />
the correct position<br />
4. Tight Shutoff Active - the switch is activated whenever the<br />
device is in tight shutoff (tight shutoff is on <strong>and</strong> the valve position<br />
is less than the tight shutoff position)<br />
5. Position Low Limit - the switch is activated whenever the valve<br />
position is less than the position setting of this switch control<br />
6. Position Upper Limit - the switch is activated whenever the<br />
valve position is greater than the position setting of this switch<br />
control<br />
7. Manual Mode - the switch is activated whenever the <strong>SVI</strong> <strong>II</strong> <strong>AP</strong> is<br />
in manual mode, configure mode, calibrate mode, or diagnostic<br />
mode.<br />
NOTE<br />
The contacts are OPEN when the <strong>SVI</strong> <strong>II</strong> <strong>AP</strong> is unpowered<br />
<strong>and</strong> may be made to be open or closed when the flag is<br />
asserted after boot.<br />
Inductive Load<br />
An inductive load (such as an inc<strong>and</strong>escent lamp) draws a surge current of as much as<br />
20 times the rated current of the lamp as the filament heats up. The switch current<br />
capacity is adequate to drive typical inc<strong>and</strong>escent loads (such as annunciator panel<br />
lamps) but a 25 Watt lamp may damage the switch. An inductive load such as a<br />
solenoid valve or relay discharges the energy stored in the coil when it is on into the<br />
switch when the coil is turned off. The switch has adequate capacity to absorb the<br />
energy from a typical low power air solenoid or control relay. Using the switch to operate<br />
a large capacity motor controller may damage the switch.<br />
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