Loop-Powered Isolators for Standard Signals
Product Announcement from Knick USA
If there is no power supply available, the galvanic isolation of 0(4) ... 20 mA standard current signals requires investment in supply units.
Many products provide loop-powered isolation with insufficent accuracy only. The desire for high accuracy demands an isolator concept that fulfils the highest expectations.
The load capability of the 20-mA source is limited and therefore requires economical handling of the load voltage.
Knick IsoTrans® 41 DC transformers with transformer isolation have specifications well beyond other loop-powered DC isolators. 0.2 % accuracy and just 1.2 V intrinsic voltage drop allow diverse uses of this isolator.
The A2 modular housing with a width of 22.5 mm for max. 3 isolators offers optimum space usage in multichannel mode. The A3 modular housing for one isolator is just 17.5 mm wide.
The full encapsulation guarantees a high level of reliability even in extreme conditions.
The galvanic isolation in the IsoTrans® 41 is achieved by using a passive isolator that obtains its power from the measuring signal as a voltage drop. This saves on supply units and cabling and increases the reliability accordingly.
The units work with a serial chopper generator in the current path. This avoids the accuracy-reducing power losses of ordinary generators which are connected in parallel, reduces the voltage drop accordingly and also ensures accurate transmission of the smallest currents.
• of input and output circuits
• of the supply voltage for 2-wire transmitters
• with addition or other coupling of signals at different potentials
• for removal of double ground compensation currents
• when there is an insufficient insulation and test voltage
• of high-potential signal sources
• for battery-powered devices with a central battery
For more information on Knick Loop powered device please click here: