MTT MS3764 Slim Plug-In 2-Channel Loop-Powered Isolator

The MTT MS3764 Slim Plug-In 2-Channel Loop-Powered Isolator draws its operating power directly from the 4-20mA current loop it is monitoring, so it can be installed without running a separate power supply to the panel. Two independent isolated channels are built into a single slim housing, letting one module isolate two current loops side by side and making efficient use of panel space in installations that need to break ground loops on multiple field signals at once.

Because it takes its power from the loop itself, the MS3764 is especially useful in retrofits and remote locations where adding AC or DC power wiring would be costly or impractical. Front-accessible trimmers allow zero and span to be adjusted on site, and channel-to-channel isolation keeps each loop electrically independent so that noise or a fault on one channel cannot propagate to the other. Its fast response and tight accuracy make it well suited to isolating signals feeding safety, control, or monitoring instrumentation that cannot tolerate lag or drift.

Input Signal4 to 20mA DC
Input ResistanceApprox. 250Ω at 20mA DC input (voltage output model); approx. 230Ω plus load resistance at 20mA DC (current output model)
Max Input Current30mA DC
Output (Voltage Model)1 to 5V DC, 50kΩ min. load
Output (Current Model)4 to 20mA DC, 350Ω max load (50-350Ω allowable range)
Zero Adjustment±2.5% span (voltage); ±0.5% span (current)
Span Adjustment±2.5% span (voltage); ±1.5% span (current)
AccuracyBetter than ±0.15% of span
Temperature CoefficientBetter than ±0.2% per 10°C change
Response Time15ms max (0-90%, step input at 100%)
CMRR100dB min. (500V AC, 50/60Hz)
Isolation100MΩ min. insulation resistance @500V DC; 1500V AC dielectric strength for 1 minute (input/output and channel-to-channel)
Surge ProtectionTested per ANSI/IEEE C37.90.1-1989
PowerLoop-powered — draws operating power directly from the input current loop, no external power supply required
DimensionsW29 x H86 x D125mm
Weight100g (main unit) / 80g (socket)
TerminalsM3.5 screw terminals with cover and drop-out screws, 0.8-1.0 Nm torque
MountingWall or DIN rail mount
Operating Conditions-5 to 55°C, 5-90% RH non-condensing
Storage Temperature-10 to 60°C
Additional FeaturesLoad change compensation circuit (current output models); dual-channel isolation

Download MTT MS3764 Slim Plug-In 2-Channel Loop-Powered Isolator information here

Datasheet: MTT_SpecSheet_MS3764_Rev20_E

Shopping Cart


Do you want to hide this popup?