MTT MS3765 Slim Plug-In Arithmetic Operation Unit

The MTT MS3765 Slim Plug-In Arithmetic Operation Unit takes two independent DC current or voltage signals and performs addition, subtraction, multiplication, or division on them, producing a single isolated output proportional to the result. Rather than dedicating separate modules to summing and differencing functions, the MS3765 consolidates all four basic arithmetic operations into one plug-in unit, giving panel designers a single part number that can be configured to whichever calculation the application calls for.

The operation to be performed, along with independent scaling factors for each input, is set directly on the module through front-panel UP/DOWN switches with an LED digit display, so technicians can select or change the equation on site without reprogramming a PLC. Front-accessible trimmers handle zero and span adjustment, and four-way galvanic isolation between inputs, outputs, and power keeps the calculated signal free of noise and ground-loop interference, making the MS3765 a flexible building block for ratio, blending, and comparison calculations at the panel level.

Input RangesCurrent -100 to 100mA (200µA-200mA span); voltage -300 to 300V (400mV-600V span)
Input Resistance1MΩ min. (voltage); 10Ω-250Ω (current, varies by range)
Max Allowable Input30V DC max (voltage models); 40mA DC max (current models)
Input Bias-100 to 100%
Output RangesCurrent 0-20mA (4-20mA span); voltage -10 to 10V (10mV-20V span)
Output Load750Ω max (single 4-20mA); 550Ω (Output 1) / 350Ω (Output 2) (dual)
Adjustment±5% of span, zero and span, via front trimmers
Selectable OperationsAddition, subtraction, multiplication, division — four selectable equations with independently programmable K1/K2 factors (0.10-2.00)
AccuracyAddition/subtraction: ±0.2% of span (K1,K2 ≤1.00), ±0.4% (K1 or K2 >1.00); multiplication: ±0.2% (K1xK2 ≤1.00), ±0.4% (K1xK2 >1.00); division: ±1.0% (K1/K2 ≤1.00), ±2.0% (K1/K2 >1.00)
Temperature EffectBetter than ±0.15% of span per 10°C change
Response Time150ms max (0-90%, step input at 100%)
CMRR100dB min. (500V AC, 50/60Hz)
IsolationComplete isolation between input, Output 1, Output 2, power, and ground; 100MΩ min. insulation resistance @500V DC; 2000V AC dielectric strength (1 minute), 500V AC (between outputs)
Power Supply100-240V AC (47-63Hz), 24V DC ±10%, or 100-240V DC; 1.7-6.0W single output / 2.1-7.2W dual output depending on supply type
DimensionsW29 x H86 x D125mm (including mounting hardware)
Weight130g (main unit) / 80g (socket) max
TerminalsM3.5 screw terminal with power terminal block cover, 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 FeaturesFront-panel UP/DOWN switches with 8.0mm LED digit display for setting equation and factors

Download MTT MS3765 Slim Plug-In Arithmetic Operation Unit information here

Datasheet: MTT_SpecSheet1_MS3765_Rev211_E

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