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Products Westermo Media Converters Current Loop Converters Westermo MD-21 DC

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* Images are for reference only. See product specifications (datasheet).

Westermo MD-21 DC

Notice: Westermo products are only shipped to the Czech Republic and Slovakia. Orders from other countries will be cancelled.

20 mA Current loop converter

1 x 20 mA current loop up to 19.2 kbit/s
2 x RS-232 up to 19.2 kbit/s

Technical Documentation:

westermo_ds_md-21.pdf westermo_ug_6151_2002_md-21.pdf westermo_cad_md-series.dxf

Terms and Conditions

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The MD-21 is a 20 mA current loop (TTY) converter allowing RS-232 systems to be connected to a 20 mA current loop interface over a distance up to 6 km (3.7 mi).

The serial interface is a standard RS-232 interface with five control signals. Since the communication is totally transparent there is no need for different settings except for if the current loop shall be active or passive.

The MD-21 is designed for use in heavy duty industrial applications. The different power options, galvanic isolation, transient protection guarantees communication in the worst environments. The MD-21 has been tested to meet many EMC, isolation, vibration and shock standards, all to the highest levels suitable for heavy industrial environments.

The design of the current loop converter makes the MD-21 suitable for a variety of applications with various speed and data bit options. The converter can be used as a standard RS-232 to 20 mA current loop converter or connected in ring creating a multi-drop network. Being able to act as the current source on both transmit and receive circuits if required ensures that the MD-21 is suitable for any TTY application.

20 mA Current loop (TTY) converter

• Standard RS-232 interface
• Serial speed up to 19 200 kbit/s
• Distance up to 6 km (3.7 mi)

✔ Easy to install and use

• Transparent communication
• Purpose built DIN rail casing with integral clip
• D-sub or screw terminal

✔ Designed for use in harsh industrial applications

• AC or DC power options
• Total galvanic isolation & transient protection
• Industrial EMC, shock and vibration approval

✔ Several configuration options

• Receiver/Transmitter active or passive
• Possibility to invert receiver and transmitter signals
• Possible to use in multidrop applications

Reference MD-21 DC

Data sheet

Connection: ≤10 Ethernet ports
Serial
Input voltage: 12 VDC
24 VDC
Installation: DIN-rail

Download

westermo_ds_md-21.pdf

Data sheet, MD-21, English

westermo_ug_6151_2002_md-21.pdf

User guide, MD-21

westermo_cad_md-series.dxf

Dimensional drawing

Why Shop With Us

After placing your order, you will receive an email with a proforma invoice that details the most advantageous shipping cost. With us, you won't pay any hidden fees; we do not incorporate shipping costs into the product price. We will also provide you with an estimated delivery date. By confirming the proforma invoice, you give us the green light to dispatch your order and agree to our delivery terms.

We are proud certified partners of brands like Advantech, Westermo, Elproma, and Korenix. This ensures that you are purchasing quality and verified products directly from a trusted supplier. Visit the link to verify our collaboration directly on the official website.

Our team has extensive experience in designing and implementing large industrial projects. We have already collaborated with significant industrial enterprises, metro systems, and railway transport. If you are planning a larger project or need consultation, we are here for you! Our specialists are happy to assist you and prepare an offer tailored precisely to your needs.

Do you have questions or need quick assistance? Our customer service is ready to respond as quickly as possible and provide you with all the information you need.

We believe in the quality of our products and services. If for any reason you are not satisfied, we are happy to help you find a solution.