The MTT MS3762F Slim Plug-In Subtractor is the fast-response version of the MS3762, taking two independent DC current or voltage signals and outputting a signal proportional to the difference between them. It suits the same differential and deviation-measurement roles as the standard subtractor, such as computing pressure drop across a filter or comparing a live process reading against a setpoint, but is intended for processes where that differential needs to be available almost instantly.
What separates the MS3762F from its standard counterpart is its markedly quicker settling time, letting the calculated difference keep pace with fast-changing inputs rather than lagging behind them. Independently configurable scaling factors on each input still allow the two signals to be weighted before subtraction, front-accessible trimmers provide on-site zero and span adjustment, and four-way galvanic isolation between input, output, and power keeps the subtracted signal protected from noise and ground loops — all combined with the faster response the “F” designation implies.
| Input Ranges | DC current -100 to 100mA (100µA-200mA span); voltage -300 to 300V (200mV-600V span) |
| Input Resistance | 1MΩ min. (voltage); 10Ω-250Ω (current, varies by range) |
| Max Allowable Input | 40mA DC max (current model); 30V DC max (voltage model) |
| Input Bias | -100% to +100% |
| Output Ranges | 0-20mA (current) or -10 to +10V (voltage); output span 4-20mA or 10mV-20V |
| Output Load | 750Ω max (single 4-20mA); 550Ω/350Ω (dual outputs) |
| Adjustment | ±5% zero and span via front trimmers |
| Subtraction Formula | Output (%) = IN1(%) x K1 – IN2(%) x K2 |
| Isolation | 4-way isolation between input, outputs, power, and ground; 100MΩ min. insulation resistance @500V DC; 2000V AC dielectric strength (input/output/power) |
| CMRR | 100dB min. @500V AC, 50/60Hz |
| Power Supply | 100-240V AC (85-264V, 47-63Hz), 24V DC ±10%, or 100-240V DC (85-264V); 5.5VA max single output (AC) / 1.8W max (24V DC) / 2.2W max (100-240V DC); 160mA fuse standard |
| Accuracy | Better than ±0.1% of span (at 25°C±5°C); ±0.2% per 10°C temperature effect |
| Response Time | 400µs max (0-90%, step input) — fast-response model |
| Dimensions | W29 x H86 x D125mm (including mounting hardware) |
| Weight | 120g (main unit) / 80g (socket) max |
| Terminals | M3.5 screw terminals with drop-out prevention screws, 0.8-1.0 Nm torque |
| Mounting | Wall or DIN rail mount |
| Operating Conditions | -5 to 55°C, 5-90% RH non-condensing |
| Storage Temperature | -10 to 60°C |
Frequently Asked Questions
What is the MTT MS3762F used for?
It’s the fast-response version of the MS3762 subtractor, taking two independent DC current or voltage signals and outputting a signal proportional to their difference. It suits the same differential and deviation-measurement roles as the standard subtractor, such as computing pressure drop across a filter or comparing a live process reading against a setpoint, but for processes where that differential needs to be available almost instantly.
How is the MS3762F different from the standard MS3762?
Response time. The MS3762F settles in 400µs max (0-90% step input), markedly quicker than the standard model, while sharing the same input/output signal ranges, subtraction formula, and ±5% zero/span trimming. Choose the F model when your differential signal changes quickly and the control system needs it without lag.
How does the subtraction work?
Each input channel has its own configurable scaling factor, so the output equals IN1 times K1 minus IN2 times K2, letting the two signals be weighted differently before the subtraction.
What input and output signal types does it accept?
Input accepts current (-100 to 100mA) or voltage (-300 to 300V), and output is a standard 0-20mA current or -10 to 10V voltage span, single or dual. Tell us your two input signal types and we can confirm the setup.
How do I know if I need the MS3762F instead of the standard MS3762?
If your differential or deviation signal is fast-changing, such as a rapid pressure swing or a quick-responding control loop, the MS3762F’s faster settling time avoids lag in your reading. For slower, steady-state differentials, the standard MS3762 is sufficient. Send us how fast your signal changes and we can confirm which model fits.
Download MTT MS3762F Slim Plug-In Subtractor information here
Spec Sheet: MTT_SpecSheet1_MS3762F_Rev120_E
Manual: MTT_Manual1_MS3762F_Rev110_E
