NIVELCO UNICOM SAK-305 User Manual
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BKI 11 ATEX 0022 sak3052a0600h_02 1/2Thank you for choosing a NIVELCO instrument.1. INTRODUCTIONThe UNICOMM SAK–305 HART modem is able to establish communication line between HART-capable fielddevices and process controller computer. Two possible application modes:– As a HART-USB modem, connected into the USB input of a PC. In this case the modem does not needexternal power supply. The device is galvanically isolated from both (USB and HART) sides.– As a HART-RS485 modem, connected into a suitable device with RS485 interface input. Thecommunication protocol is HART on the RS485 line. The RS485 network is a 2-wire (half duplex) system.In this case the device needs external power supply. The device is galvanically isolated from both (HARTand Power supply) sides.The UNICOMM SAK–305–6 HART modem is an associated apparatus. It shall be placed outside thehazardous area and can be connected to HART-capable field devices placed inside the hazardous area.2. TECHNICAL DATA2.1. G ENERAL DATAHART-USBMODEMPower supply Supplied from USBCurrent consumption < 60 mAElectricalconnectionPC USB A-B cableHARTlineTwisted, shielded pair with 0.5…2.5 mm 2 (AWG20…AWG14) wirecross section Resistance max.75 Ω, Capacitance max. 200 nFHART-RS485 MODEMPower supply (U p ) 10…30V DCPower consumption < 1.5 WElectricalconnectionSupply 0.5…2.5 mm 2 (AWG20…AWG14) wire cross sectionRS485 interface Twisted, shielded pair with 0.5…2.5 mm 2 (AWG20…AWG14) wirecross sectionHART line Twisted, shielded pair with 0.5…2.5 mm 2 (AWG20…AWG14) wirecross section Resistance max.75 Ω, Capacitance max. 200 nFRS485 terminal resistance 124 ΩRS485 max. cable length 1000 m (3300 feet)HART resistance 250 ΩAmbient temperature –20°C…+70 °C (–4°C…+158 °F)Housing material PPOMechanical connection DIN (EN 60715) rail mountableIngress protection IP20Electrical protection Class III.Mass 0.1 kg (0.22 lbs)2.2 S PECIAL DATA FOR E X CERTIFIEDMODELSEx marking II (1) G [Ex ia Ga] IICIntrinsicallysafe limit dataU i=30 V, I i=100 mA, Pi=1 W,Li=200 μH, C i=2 nFU m 253 V AC2.3 A CCESSORIES User’s manual Warranty Card EU Declaration of Conformity USB A-B cable (1.8m)2.4 O RDER CODEUNICOMM SAK–305–Standard 2Ex ia 62.5 D IMENSION2.6 C ONDITIONS OF E X APPLICATIONThe device should be placed outside thehazardous area and should be connected tointrinsically safe [Ex ia] certified and approveddevices! The device should be protected againstdirect sunlight!The power supply and ambient temperature valuescan not exceed the limitations of the technical datatable!3. WIRING3.1 W IRING EXAMPLE. |
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