3B39

`Interfaces, isolates, & filters a 0 to +10V or -10V to +10V input signal and provides an isolated process current output across loads of 0 to 850..
`Intended for high-accuracy process control and monitoring applications requiring total galvanic isolation.
`Module circuitry can withstand 220v rms at the output screw-terminals.
`All 3B39 series modules are mix-and-match and Hot
`Swappable

The 3B39 is a single-channel signal conditioning current output module that interfaces, isolates and filters a 0 to +10V or -10V to +10V input signal and provides an isolated process current output across loads of 0 to 850. The output current appears at the 3B Series backplane current output screw terminal block. It is intended for high-accuracy process control and monitoring applications requiring complete galvanic isolation and protection against damage from transients and faults between systems or separated system elements. Either of the two input voltage ranges can be converted to either of the two output current ranges via programming jumpers provided on the bottom of the module. Model 3B39 features a nonlinearity of +0.01% and an accuracy of +0.1%. Providing +1500V peak of galvanic transformer based isolation output-to-input and power,the 3B39 offers a common mode rejection (CMR) of 90 dB @ 50/60 Hz to preserve the integrity of low level signals in noisy environments. The 3B39 is mix-and-match and hot-swappable with other 3B Series modules, so it can be inserted or removed from any socket in the same backplane without disturbing system power.

Signal isolation by transformer coupling uses a proprietary modulation technique for linear, stable and reliable performance. A demodulator on the output side of the signal transformer recovers the original signal, which is then filtered and converted to an accurate current output by a current (V-to-I) converter output stage. Output protection enables the 3B39 to withstand accidental connection to 220V rms power lines without damage, isolating computer-side circuitry. The 3B39 provides total ground isolation and transient protection when interfacing DACs to standard 4-20 mA current loops, common requirement in microcomputer based control system.