Masoneilan Products SVI II ESD - GE Energy

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GE Energy SVI II ESD Quick Start Electrical Connection Guidelines When making the SVI II ESD electrical connections, follow these guidelines: 1. The SVI II ESD device is available in two control signal configurations: 20 mA or 24 VDC. 2. Provide sufficient electrical isolation between adjacent signal lines and between signal lines and ground for all wiring. 3. Use stranded 14 to 22 AWG (or equivalent gauge and flexibility). 4. Use conduit sealant to prevent condensation from entering the enclosure and, in Class 1 Div. 2 conditions to prevent hazardous gasses and vapors from migrating through the conduit to the control room or an open ignition source. 5. Wire according to the National Electrical Code (ANSI-NFPA 70) or other applicable local codes. 6. The terminal clamps are designed for one wire only; DO NOT attempt to terminate multiple wires into one terminal. 7. Strip the wires to the recommended length (See product specifications). 8. Ensure all wire stands are fully inserted into the terminal block and no shorts between adjacent wires on the terminal block are possible. 9. Use care when running signal wiring near to or crossing conduit or wiring that supplies power to motors, solenoids, lighting, horns, bells, etc. Provide sufficient electrical isolation and shielding against electro-magnetic interference from items in the vicinity of the cable run. 10. Run AC power wiring in a separate conduit from DC power. All power wiring to and from the SVI II ESD must be in grounded conduit. Protect outdoor cable runs against lightning strike. 11. Connect the SVI II ESD to a high quality instrument grade ground sized as required by local electrical codes. A grounding stud is provided inside the enclosure. WARNING Comply with current national and local regulations for electrical installation work. Comply with national and local explosive atmosphere regulations. Before carrying out any work on the device, power off the instrument or make sure that the locale conditions for potentially explosive atmosphere permit the safe opening of the cover. 32
Installation and SVI II ESD Configurations Wiring the SVI II ESD There are three possible SVI II ESD installation configurations each with a different wiring scheme. Analog Safety Demand (ASD) Discrete Safety Demand (DSD) Analog Safety Demand (ASD) Analog with Discrete Safety Demand (A/DSD) The Analog Safety Demand configuration is: 4 - 20 mA signal, power and trip signal with superimposed HART communications (Figure 13). Control System or Safety System AO 4 - 20 mA + HART SVI II ESD 2 Wire Solution - Safety Function Triggered by Current Sensing (5.6 mA = Safety Trip) Figure 13 Analog Safety Demand (ASD) Configuration Discrete Safety Demand (DSD) The Discrete Safety Demand configuration is: 24 VDC, power and trip signal with superimposed HART communications (Figure 14). . High Impedance Device Required for HART Signaling Control System or Safety System DO 24 VDC + HART SVI II ESD Safety Function Triggered by Discrete 0 - 24 VDC Signal (3 VDC = Safety Trip) Figure 14 Discrete Safety Demand (DSD) Configuration 33
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