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Masoneilan Products SVI II ESD - GE Energy

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Installation and<br />

<strong>SVI</strong> <strong>II</strong> <strong>ESD</strong> Configurations<br />

Wiring the <strong>SVI</strong> <strong>II</strong> <strong>ESD</strong><br />

There are three possible <strong>SVI</strong> <strong>II</strong> <strong>ESD</strong> installation configurations each with a<br />

different wiring scheme.<br />

Analog Safety Demand (ASD)<br />

Discrete Safety Demand (DSD)<br />

Analog Safety Demand (ASD)<br />

Analog with Discrete Safety Demand (A/DSD)<br />

The Analog Safety Demand configuration is: 4 - 20 mA signal, power and trip<br />

signal with superimposed HART communications (Figure 13).<br />

Control System<br />

or<br />

Safety System<br />

AO<br />

4 - 20 mA + HART<br />

<strong>SVI</strong> <strong>II</strong> <strong>ESD</strong><br />

2 Wire Solution - Safety Function Triggered by Current Sensing (5.6 mA = Safety Trip)<br />

Figure 13 Analog Safety Demand (ASD) Configuration<br />

Discrete Safety Demand (DSD)<br />

The Discrete Safety Demand configuration is: 24 VDC, power and trip signal with<br />

superimposed HART communications (Figure 14).<br />

.<br />

High Impedance<br />

Device Required<br />

for HART Signaling<br />

Control System<br />

or<br />

Safety System<br />

DO<br />

24 VDC + HART<br />

<strong>SVI</strong> <strong>II</strong> <strong>ESD</strong><br />

Safety Function Triggered by Discrete 0 - 24 VDC Signal (3 VDC = Safety Trip)<br />

Figure 14 Discrete Safety Demand (DSD) Configuration<br />

33

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