Dataforth Corporation, Tucson, Arizona announces the introduction of its new DSCL22 and DSCL23 DIN rail mount series of multi-channel loop powered isolators. These isolators provide a simple low-cost solution for providing up to 4000Vrms isolation protection for analog signals in the range of 0(4) to 20mA. They are designed for preventing the transfer of interference voltages or currents and for breaking signal distorting ground loops. The DSCL22 can be ordered with up to three channels in one package, which provides low cost isolation.

The DSCL22 and DSCL23 are similar in function; both provide loop powered isolation for 0(4) to 20mA analog signals deriving power from the input signal, and both are available in multi-channel versions. No external power supply is required. The DSCL23 differs slightly from the DSCL22 since it can feed isolated DC power from it’s output side to a field transmitter connected to it’s input side.

The DSCL22 provides 4000Vrms-transformer isolation in the single channel version. Two and three channel models are available which provide 2300Vrms-transformer isolation. All have an input range of 0(4) to 20mA and output ranges of 0(4) to 20mA or 0(2) to 10V. Accuracy over the entire operating range is better than ± 0.1%. The load resistance range is 0 to 1000Ù, and bandwidth is 300Hz. Packaging is a narrow DIN rail case measuring only 0.69 inches (17.5mm) wide for high density mounting.

Mounting tabs can be extended from the case for panel mount applications. Operating temperature is - 25°C to +55°C, and storage temperature is -40°C to +70°C.

Each DSCL23 provides 2300Vrms-transformer isolation in either the one or two channel versions. The DSCL23 is unique in the industry since DC power on the output side is isolated and is provided to a twowire transmitter connected to the input side. The returned 4 to 20mA input signal from the transmitter is also isolated and passed back to the output side. Input and output ranges are fixed at 4 to 20mA.

Accuracy over the entire operating range is better than ± 0.2%. The DC power supply can vary between 12 and 30VDC, and a minimum of 21.3VDC is supplied to the input connected transmitter when the power supply is 24VDC. Packaging is a narrow DIN rail case measuring only 0.69 inches (17.5mm) wide for high density mounting. Mounting tabs can be extended from the case for panel mount applications. Operating temperature is -25°C to +55°C, and storage temperature is -40°C to +70°C.

For additional information and pricing, call 800-444-7644 toll-free, or e-mail at sales@dataforth.com.