Texas Instruments, Inc., Semiconductors
Dallas, TX 75243
Jul 31, 2007 Suited for high-voltage, noisy applications, dual-channel ISO7220 and ISO7221 utilize capacitive technology to provide galvanic isolation up to 4,000 V and immunity from external magnetic fields. Devices also offer immunity against data corruption due to voltage transients up to 24 kV/µs. To faciliate PCB layout, ISO7220 has 2 channels in same direction and ISO7221 has 2 channels in opposite directions. Both provide 3 speed options of 1, 25, and 150 Mbps.

Pepperl+Fuchs
Twinsburg, OH 44087
Jun 25, 2007 HiC family of Intrinsic Safety Isolators provide single channel of isolated power and ultra-thin housing for reliable industrial signal transmission and system availability. Motherboard-mounted HiC modules feature SIL 2/3 rating and 0.8 W power dissipation that keeps cabinets cool. Units can be fastened onto 8 or 16 slot termination boards without need for tools or wiring, and can be expanded with HART communication board and fault indication board.

Absolute Process Instruments Inc.
Libertyville, IL 60048
Dec 26, 2006 Offering 2 channels of signal isolation and retransmission, DuoPak(TM) Signal Conditioners can be custom-configured to accept any 2 process signal inputs including DC voltage or current, AC voltage or current, frequency, potentiometer, or RTD temperature. Two optically isolated output channels can be configured for standard or custom DC voltage or current signals. Units include I/O LoopTracker® LEDs and functional test pushbutton for testing output independent of input signal.

Acromag, Inc.
Wixom, MI 48393 7037
Sep 07, 2004 AC/DC-powered 630T Series isolators and signal splitters feature internal excitation supply to drive up to two 2-wire transmitters or other input loop devices. Multi-channel isolators provide space-efficient solution to eliminate ground loops, filter signal noise, and block high voltage surges. Measuring 1 in. wide, single/dual-channel isolators receive 4–20 mA inputs and provide fully isolated 4–20 mA output signals.

Absolute Process Instruments Inc.
Libertyville, IL 60048
Jul 17, 2003 IsoSplitter™ 4393 dc/dc transmitter accepts one dc voltage or current input and provides 2 optically isolated dc voltage or current outputs. Input and output ranges can be independently configured to requirements. Unit includes LoopTracker® LEDs for input/output monitoring and functional-test button for testing output, independent of input signal. It is suitable for systems with multiple devices on same process loop, including PLCs, DCS, BAS, panel meters, and recorders.

JH Technology, Inc.
Sarasota, FL 34233 2432
Feb 07, 2003 Model FDT5000 provides on-site display, isolation, and conversion of 4–20 mA loops and other process signals. Unit features 1,000 V isolation and 24 V output compliance, making is suitable for solving ground problems, increasing loop drive, or splitting signals between 2 isolated loops. Housed in NEMA-4x splash-proof, corrosion-resistant enclosure, conformal-coated circuit boards provide protection for use outdoors or in remote, damp, and dirty process areas.

ICS Electronics Corp.
Milpitas, CA 95035
Oct 30, 2002 Model 4860A isolates instruments from bus controller and does not generate false replies to 488.2 FindListener Protocol used by LabView™ and VEE™. Use of optical isolators and separate power supplies achieve 2,000 Vdc isolation between main bus and isolated bus. Optical isolators also provide 5,000 V/µsec noise and 50 V common mode isolation between buses. Smart logic recognizes which bus is connected to bus controller-in-charge and active talker.

Wilkerson Instrument Co., Inc.
Lakeland, FL 33811
Sep 26, 2002 Model DR4300 isolated signal conditioner can be supplied with inputs from ±50 mV to ±256 Vdc or ±0/1 mA to ±200 mA. Outputs can be supplied for 0/1 V, 1/5 V, 0/5 V, -5/5 V, 0/10 V, -10/10 V, 0/1 mA, 0/20 mA, or 4/20 mA. Unit is powered by 21 to 28 Vdc and provides 3-way isolation rated at 1500 Vac, 50/60 Hz. It has plug-in screw terminal blocks, and ZERO and SPAN controls on front panel. Isolator can measure voltage or current signals with high common mode levels present.

WAGO Corporation
Germantown, WI 53022
Nov 28, 2001 786 Series transducers can convert 0-10 V or 4-20 mA signals into isolated 0-10 V, 0-20 mA, or 4-20 mA signal with isolation rating of 4kV. It can be plugged directly onto terminal block assembly using base receptacle blocks that are 15, 20, or 25 mm wide. Modules are protected against mismating and can be replaced in single operation during maintenance without affecting wiring. Touchproof test contacts can also be used.