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Hersteller: Omega Engineering Dateigröße: 103.95 kb Dateiname: Unterrichtssprache:

Failure to observe this warning could result in serious injuries or damages. GROUP CAPACITANCE INDUCTANCE A & B 0.1 .F 3 mH C 0.2 .F 10mH D 0.3 .F 20mH Example: Typical values of capacitance for a twisted pair of copper wires is between 20 and 60 pF per foot. Using the maximum value of 60pF/ft, Groups A & B could have a run of 1500+ feet with safety. Inductance of a typical twisted pair is between 0.10 and 0.20 .H/ ft, thus making a cable run in this example essentially determined by the capacitance. Fig. 2. Connection Diagram: Model SBG41705 Hazardous LocationSensor Switch LOADVAC AC Load Latching Solid-State Relay SBG41705 On C Off Non-Hazardous Location Non-Intrinsically Earth Safe Wiring Ground (2 Places) Common Earth- Multiple Grounded Units Mounting Plate Intrinsically Safe Wiring Resistance to ground must be from bracket to earthing member to insure integrity of system. To Sensors (Must be below one ohm.) Note: All intrinsically safe wiring must be segregated from non-intrinsically safe wiring. Fig. 3. Multiple units grouped on a common, earth-grounded mounting plate. Mounting Intrinsically Safe Solid-State Relays #10 Screw #10 Lockwasher* #10 Lockwasher* Plate #10 Nut • Whenever possible, the actual measured parameters should be used in making the determination of allowable length. • Shielded cable is not required, but if used in the application, the shield must be returned to ground, the same point at mounting tab. *(Lockwashers to be internal or external tooth type) Fig. 4. Unit Mounting Detail • Non-intrinsically safe wiring cannot be run in conduit or open raceways together with intrinsically safe wiring.** • Refer to Fig 6 for detailed connection to terminal studs. All hardware, including terminal lugs, is supplied with unit. • Fusing of the solid-state relays to be in accordance with Fig. 1. Fuse F1 to be 6 amps slo-blo, 120 VAC for 120V line voltage; 250 VAC for 240 V application. **Note: All intrinsically safe wiring to intrinsically safe solid-state relays must be segregated from non-intrinsically safe wiring. Lockwasher* NutLockwasher* NutMountingScrew Plate Lockwasher* Terminal Lug Notes: 1. *(Lockwasher to be internal or external tooth type) 2. Grounding hardwre to be #8 or larger and S.S. Fig. 5. Mounting Plate Grounding Detail HEX Nut Anti-Vibrational Lockwasher (Tighten assembly to between 3 and 5 in-lbs.) Terminal Lug (Closed Ring Type) Terminal Stud Fig. 6 Recommended method of connection to electrical terminals. All terminal hardware, including lug, supplied with unit. Stud Nylon Nylon Stud Cover Stud Nuts Terminals LatchingSolid-State Relay Cover Stud Nuts Terminals Non-LatchingSolid-State Relay Fig. 7. Mounting of protective cover over sensor-connected terminals of unit. 7/32" Dia. (5.5 mm) 2-5/8" 3" (66.6 mm) (76 mm) Mounting 1-5/8" Tab (41.3mm) 2-1/4" (55mm) 3-1/8" 13/16" (79mm) (20.7mm) Fig. 8. Dimensions Table 1. Specifications Model Number Description Line & Load Voltage Range Load Current Max Turn-On Sensitivity ...

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