DTPM-37 4-20mA Digital Potentiometer

DTPM-37 is a compact 4-20mA digital potentiometer designed to generate an adjustable analog reference signal for industrial automation applications.

Unlike conventional mechanical potentiometers, the DTPM-37 offers stable electronic adjustment without contact wear, ensuring excellent long-term reliability and repeatable output accuracy.

The output value can be adjusted directly from the front panel keys or remotely by using external dry-contact digital inputs, making the device suitable for both local and remote control applications.

Key Features

+ Adjustable 4-20mA analog output
+ Bright 4-digit 7-segment LED display
+ Front panel Up / Down adjustment keys
+ External dry-contact Up / Down control inputs
+ Adjustable lower and upper output limits
+ Adjustable scaling range
+ Password-protected parameter menu
+ Non-volatile memory for all settings
+ Plug-in terminal block for easy wiring
+ Compact 35×77 mm panel design

Technical Specifications

Model : DTPM-37
Output : 4-20mA Analog Output
Display : 4-digit 7-segment LED
Dimensions : 35 × 77 mm
Panel Cut-out : 29 × 71 mm
Supply Voltage : 100...240VAC 50/60Hz or 24VAC/DC
Power Consumption : <6VA
Accuracy : ±1% Full Scale
Operating Temperature : 0...50°C
Protection Class : IP20

Typical Applications

+ Variable Frequency Drive (VFD) speed reference
+ Pump control systems
+ Fan speed control
+ PLC analog input simulation
+ Industrial process control
+ Machine automation
+ Analog signal generation
+ Laboratory and testing equipment 

++  DTPM-37 4-20mA Digital Potentiometer (pdf) 

How Does It Work?

The DTPM-37 converts the operator's selected value into a precise 4-20mA analog output signal. This signal can be used as a reference input for variable frequency drives, PLCs, process controllers, actuators and many other industrial control devices.

The output value can be increased or decreased using the front panel buttons or by connecting external dry-contact push buttons to the digital input terminals.

Remote Control Capability

External Up and Down digital inputs allow remote adjustment from push buttons, relay contacts or PLC outputs using dry contacts.

Only dry-contact inputs should be connected to the digital input terminals. Applying an external voltage to these terminals may damage the device.

DTPM-37 vs DTPV-37

Both models share the same hardware platform but provide different analog output types.

DTPM-37 provides a 4-20mA current output, while DTPV-37 provides a 0-10V voltage output.

The correct model should be selected according to the analog input requirements of the connected equipment.

Why Choose DTPM-37?

Compared with conventional potentiometers, the DTPM-37 provides greater accuracy, improved stability and longer service life because there are no mechanical sliding contacts subject to wear.

Its compact panel-mount design, intuitive user interface and flexible analog output adjustment make it an excellent solution for industrial control panels, machine builders, OEM equipment manufacturers and automation engineers.

Important Notice

The DTPM-37 is designed as an analog reference signal generator. It should not be used as the sole safety device in any control system.

Emergency stop circuits, overload protection, contactors and other independent safety devices should always be incorporated into the machine or process control system.