The MTT MS3782 Slim Plug-In PWM Converter takes a DC current or voltage input and converts it into a pulse-width-modulated output signal whose duty cycle tracks the input level, giving panel builders a way to drive equipment that expects a PWM control signal from a standard analog process reading. This makes it a useful bridge between analog instrumentation, such as a 4-20mA transmitter, and devices like variable-speed drives, dimmers, or actuators that are controlled by duty cycle rather than a straight analog level.
The output can be configured as a TTL-level, open-collector, or voltage pulse signal, and both the switching frequency and the duty-cycle range are adjustable to match the receiving equipment. Front-accessible trimmers allow zero and span to be adjusted on site, and four-way galvanic isolation between input, output, and power keeps the PWM signal clean and protected from noise and ground loops as it travels to its destination.
| Input Ranges | Current -100 to 100mA (100µA-200mA span); voltage -10 to 10V (200mV-20V 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) |
| Output Signal | PWM with adjustable duty cycle (80% to 0%); TTL level, open collector, or voltage pulse (10V or 12V) |
| Max Output Load | TTL 10mA @3.5V; voltage pulse 7-15mA; open collector 100mA @30V |
| Frequency Range | 10Hz to 1kHz (user-specified ±30%) |
| Adjustment | ±5% of span, zero and span, via front trimmers |
| Accuracy | Better than ±1.5% of span (at 25°C±5°C); ±0.2% per 10°C temperature effect |
| Response Time | 1s max (0-90%) |
| Isolation | 4-way isolation between input, output, power, and ground; 100MΩ min. insulation resistance @500V DC; 2000V AC dielectric strength for 1 minute |
| Power Supply | 100-240V AC (85-264V, 50-60Hz), 24V DC ±10%, or 100-240V DC (85-264V); 6-6.5VA (AC) / 1.8-2.0W (24V DC) / 2.0-2.5W (100-240V DC) |
| Dimensions | W29 x H86 x D125mm |
| Weight | 120g (main unit) / 80g (socket) max |
| Terminals | M3.5 screw terminals, 0.8-1.0 Nm torque, drop-out prevention screws |
| 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 MS3782 used for?
It converts a DC current or voltage input into a pulse-width-modulated output whose duty cycle tracks the input level, bridging standard analog instrumentation like a 4-20mA transmitter to equipment, such as variable-speed drives, dimmers, or actuators, that is controlled by duty cycle rather than a straight analog level.
What output formats are available?
The PWM output can be configured as TTL-level, open-collector, or voltage pulse, and both switching frequency and duty-cycle range are adjustable to match the receiving equipment. Tell us what your downstream device expects and we can confirm the configuration.
Can zero and span be adjusted on site?
Yes, front-accessible trimmers allow zero and span to be fine-tuned after installation, without needing to reconfigure the unit from a PC.
Is the signal isolated?
Yes, four-way galvanic isolation between input, output, and power keeps the PWM signal clean and protected from noise and ground loops as it travels to the receiving equipment.
How do I know if the MS3782 is right for my application?
If you have a standard analog signal and need to drive equipment that takes a PWM duty-cycle input instead, the MS3782 handles that conversion with adjustable frequency and duty-cycle range. Send us your input signal type and the PWM format your equipment needs and we’ll confirm before you order.
Download MTT MS3782 Slim Plug-In PWM Converter information here
Datasheet: MTT_SpecSheet_MS3782_Rev10_E
