Pt100/Cu50 RTD to 4-20mA Passive Isolated Transmitter IC

SunYuan ISO Z-W-O1 is one of the smallest size (SIP 12Pin) low cost passive 2-wire 4-20mA loop poweredthermal resistance signal isolation transmitters. The signal isolation transmitter is mainly applied in 2-wire, 3-wireor 4-wirePT10/PT100/PT1000 or Cu50/Cu100 temperature sensor signal acquisition, isolation and transmission. It canconverttemperature signal collected from thermal-resistance sensor into standard 4-20mA current signal output in linearity. Unique magneto-electric isolation mode and high efficient final level feed technique have been used in developinganddesigning that isolation transmitter. It realizes thermal resistance temperature signal to 4-20mA standard signal isolatedconversion in high accuracy without power supply. The output signal can be well matched with any types of meters&instruments(like PLC, DCS system) analog input terminals. The signal transmitter is a kind of low cost, small size standardSIP12PINflame-retardant integrated circuits. Inside the IC, there is signal modulation and demodulation circuit, signal couplingisolatedconversion circuit, high efficient DC-DC step-up circuit, signal zero/gain calibration circuit and thermal resistancelinear circuit,long-line compensation, interference suppression circuit, etc. Output loop powered power supply range: 12--30VDC, it hashighaccuracy in conversion and good linearity. The zero and gain can be adjusted and calibrated by adding external potentiometer.Byadopting advanced integrated internal structure and new isolation technology, the modules posses the features: 3KVDCisolationbetween signal input and output (total isolation type), and operates in normal in abominable industrial conditionslikewidetemperature, humidity and vibration. Sunyuan ISO ZW-O1 has the following features: small size, easy to use, can be easily installed in the other devices, it canrealize PT100 and other thermal resistance sensor signal acquisition and isolated conversion with high accuracy by addingsomeexternal components. The signal transmitter is loop powered, so user do not need to add external power supply andthat canreduce users’ cost. The signal transmitter have two types of package, small size PCB-mounted package, 35mmDINrail-mountedpackage. The 35mm DIN rail-mounted products can be 1-input 1-output, 2-input 2-output, 3-input 3-output. For 35mmDINrail-mounted package, there are adjusting & calibration circuits inside, and wiring terminal outsides, user can use it directly