The MTT MS3709 is a slim plug-in pulse shaper that takes a pulse signal from a dry contact, open-collector output, AC or DC voltage, or a 4-20mA current loop, and reshapes it into a clean, isolated pulse output. It removes contact bounce and signal noise from the source and presents a consistent, well-defined pulse to counters, PLCs, or other pulse-counting equipment.
Where a dual-output configuration is used, both outputs stay isolated from each other, the input, and the power supply, letting one pulse source feed two independent downstream systems at the same time. Like the rest of the plug-in transmitter range, the MS3709 clips into its own socket base so the unit can be swapped for calibration or replacement in seconds without disturbing the field wiring, and flexible AC or DC power plus wall or DIN rail mounting make it easy to fit into an existing panel.
| Input Types | Dry contact, open collector, AC voltage, DC voltage, or 4-20mA current |
| Input Voltage Range | Up to 200Vp-p AC; 0-300V DC |
| Input Current Range | 0-100mA DC (user-specified) |
| Minimum Pulse Width | 10μs min. (ON and OFF) |
| Input Resistance | 1MΩ minimum (with power, voltage input) |
| Output | TTL level, open collector, or 10V±10% / 12V±10% voltage pulse (single or isolated dual output) |
| Maximum Output Frequency | 50kHz (voltage pulse); 20kHz (open collector) |
| Output Load | 10mA at 3.5V (TTL); 7mA at ±10% (voltage pulse); 30V/100mA max (open collector) |
| Isolation | 4-way isolation between input, Output 1, Output 2, power, and ground |
| Power Supply | 100-240V AC (5.0-5.5VA), 24V DC (2.1-2.2W), or 100-240V DC (7.2W) |
| Insulation Resistance | 100MΩ minimum at 500V DC |
| Dielectric Strength | 2000V AC for one minute |
| Hold Time Accuracy | Better than ±20% of a user-specified value |
| Dimensions (W x H x D) | 29mm x 86mm x 125mm |
| Weight | Main unit 120g; socket 80g |
| Mounting | Wall or DIN rail mounting, plug-in socket base |
| Operating Temperature | -5 to 55°C ambient |
Frequently Asked Questions
What is the MTT MS3709 used for?
It cleans up a pulse signal from a dry contact, open-collector output, AC/DC voltage, or 4-20mA current loop, and reshapes it into a clean, isolated pulse for counters, PLCs, or other pulse-counting equipment.
Why would I need a pulse shaper instead of wiring the sensor directly?
Raw contact or field-generated pulses can carry noise or contact bounce that confuses a counter or PLC input. The MS3709 removes that noise and isolates the signal, giving a consistent, well-defined pulse downstream.
What output types does the MS3709 provide?
TTL level, open collector, or a defined voltage pulse (10V or 12V ±10%), selectable to match what your counter or PLC input expects.
Can the MS3709 feed two separate systems from one pulse source?
Yes, in its dual-output configuration — both outputs are isolated from each other, the input, and the power supply, so one pulse source can feed two independent downstream systems at the same time.
What’s the difference between the MS3709 and the MS3708?
The MS3708 converts a pulse/frequency signal into a proportional analog DC output. The MS3709 keeps the signal in pulse form, just cleaned up and isolated, for equipment that counts pulses directly rather than reading an analog value.
Download MTT MS3709 Slim Plug-In Pulse Shaper information here
Spec Sheet: MTT MS3709 Spec Sheet
Manual: MTT MS3709 Manual
