Circuit Design, Inc. List of Products and Services

The "SLR-429M" is an embedded wireless module designed for ease of use. In addition to the LoRa mode, which enables ultra-long-range communication at low bit rates, it also features a conventional FSK mode. It achieves LPWA via LoRa with a completely proprietary protocol in the 429MHz band, which is designed solely for circuit applications. The 429MHz band has superior diffraction characteristics compared to the 920MHz band, allowing for stable communication in various environments such as indoors, mountainous areas, along rivers, and underground. It connects to external microcontrollers or PCs via a UART interface. This is a specific low-power wireless module that requires no license and incurs no communication fees. 【Features】 ■ Communication distance: over 10km line of sight ■ Communication speed: 245bps ■ Capable of communication with up to 8 contact points ■ Superior diffraction characteristics compared to the 920MHz band *You can purchase directly from the related links. Orders starting from one unit are also welcome!

MLR-429 is a wireless module that focuses on serial communication, pursuing miniaturization and ease of integration. In addition to conventional FSK mode communication, it features a LoRa mode that enables ultra-long-range communication at low bit rates. In LoRa mode, it achieves communication distances of over 10 km in line of sight, despite having a low transmission power due to excellent reception sensitivity. It connects to external microcontrollers or PCs via a UART interface, allowing for the transmission and reception of customer data and device control using our unique command system developed in the industrial sector. It can be used for data transmission and telemetry applications. 【Features】 ■ Equipped with Technical Compliance Mark ■ Ultra-long-range data communication in the 429 MHz band using LoRa mode ■ Compact size ■ Compatible with LTM-1

The MU-3-429 is a command control wireless modem that can interface with the UART of a one-chip CPU or the COM port (RS232C) of a computer. It has obtained the Technical Compliance Mark, allowing it to be used without a radio station license or registration. Thanks to its optimized RF circuit, it achieves stable operation over a wide temperature range, long-distance communication, and low voltage/low power consumption. It is equipped with a powerful error correction function using Reed-Solomon coding, enabling the construction of a reliable system. You can select the frequency band according to your application and communication environment. 【Features】 ■ Obtained Technical Compliance Mark (Construction Design Certification) ■ Simple dedicated commands common to the series for serial data transmission ■ Relay function (up to 10 stations) ■ Powerful error correction function

The MU-3-1216 is an intelligent modem capable of command control that operates in the 1216MHz band, which provides a relatively low-noise and clean radio environment. It can be controlled using a common command system shared with other MU series models and is compact in size, similar to the 429MHz band. Depending on the application and communication environment, you can choose the frequency band. Thanks to excellent RF circuit technology, it achieves stable operation over a wide temperature range, long-distance communication, low voltage operation, and low power consumption. 【Features】 ■ Acquired Technical Standard Mark (Construction Design Certification) ■ Simple dedicated commands common to the series for serial data transmission ■ Relay function (up to 10 stations)

The MU-4-429 is an intelligent modem for command control that can interface with one-chip CPU UARTs and computer COM ports (RS232C). It is compatible with the command and protocol of the conventional MU-1(N)-429, MU-2-429, and MU-3-429, allowing for easy integration into systems that use these wireless modems. The MU-4-429 is equipped with powerful error correction capabilities, achieving more stable communication. It is compatible with the pin, command, and air protocol of the MU-2-429, allowing for direct replacement and use. 【Features】 ■ Obtained Technical Conformity Mark (Construction Design Certification) ■ Simple dedicated commands for serial data transmission ■ Compact body (55% of the volume of MU-3-429) ■ Powerful error correction function

MU3-IN8 and MU3-OUT8 are 8-point input/output boards equipped with the specific low-power wireless module MU-3 (429MHz band / 1216MHz band). They continuously transmit contact information using the MU-3 designed for industrial applications, enabling continuous contact control as required in telecontrol and factory automation. The input uses photo couplers, and the output uses photo MOS relays, allowing for high isolation and connection to high-capacity loads. Additionally, the input and output are connected via terminal blocks, making wiring easy. Not only can the boards communicate with each other, but they can also be controlled from a PC. When controlled from a PC, communication through a relay station and control of multiple boards is also possible. You can choose between the 429MHz band and the 1216MHz band as needed. 429MHz band Input board: MU3-IN8-429 Output board: MU3-OUT8-429 1216MHz band Input board: MU3-IN8-1216 Output board: MU3-OUT8-1216

The MU3-IN8-429 is an 8-channel input board equipped with the specific low-power wireless module MU-3-429. It continuously transmits contact information via the MU-3-429, making it suitable for continuous contact control required in telecontrol applications. The inputs are composed of photo couplers, allowing for high isolation and connection to high-capacity loads. Additionally, the inputs are configured with terminal blocks, enabling easy embedded wiring. The MU3-IN8-429 can not only communicate between boards but also read contact information from a PC or CPU using the MU-3-429. When controlling from a PC, relay functionality can be utilized, allowing for the collection of contact information from locations several kilometers away. The relay station for the MU-3-429 operates solely with initial device setup and power supply. To operate, pairing settings between the MU3-IN8-429 and MU3-OUT8-429 must be configured initially. This wireless device allows the antenna to be installed in a location with good radio wave conditions using an extension cable. 【Features】 ■ Continuous communication of 8 contact information ■ Easy embedded wiring via terminal blocks ■ High isolation with photo couplers

The MU3-OUT8-429 is an 8-point output board equipped with the specific low-power wireless module MU-3-429. It continuously transmits contact information via the MU-3-429, making it suitable for continuous contact control required in telecontrol applications. The output is composed of photo MOS relays, allowing for high isolation and the connection of high-capacity loads. Additionally, the output is on a terminal block, making it easy to wire for integration. The MU3-OUT8-429 can control contact information from a PC or CPU using the MU-3-429, not just for communication between boards. When controlling from a PC, a relay function can also be utilized, enabling control of contact information from locations several kilometers away. The relay station for the MU-3-429 operates solely with the initial setup of the device and power supply. To operate, pairing settings between the MU3-IN8-429 and MU3-OUT8-429 are required initially. This wireless device allows the antenna to be installed in a location with a good radio wave environment using an extension cable. 【Features】 ■ Continuous communication of 8 contact information ■ Easy wiring integration via terminal block ■ High isolation with photo MOS relays

The MU3-IN8-1216 is an 8-point input board equipped with the specific low-power wireless module MU-3-1216. It continuously transmits contact information via the MU-3-1216, making it suitable for continuous contact control required in telecontrol applications. The inputs are configured with optocouplers, allowing for high isolation and connection of high-capacity loads. Additionally, the 1216MHz IN8/OUT8 board has a faster response time compared to the 429MHz version. The inputs are connected via terminal blocks, making it easy to integrate wiring. The MU3-IN8-1216 can not only communicate between boards but also read contact information from a PC or CPU using the MU-3-1216. When controlling from a PC, relay functionality can be utilized, allowing for the collection of contact information from locations several kilometers away. The relay station operates with only the initial setup of the MU-3-1216 and power supply. To operate, pairing settings between the MU3-IN8-1216 and MU3-OUT8-1216 are required initially. 【Features】 ■ Continuous communication of 8 contact information ■ Easy integration wiring via terminal blocks ■ High isolation with optocouplers

The MU-3-1216 transmits contact information continuously, making it suitable for continuous contact control required by telecontrol systems. The output is composed of photo MOS relays, enabling high isolation and connection to high-capacity loads. At 1216MHz, the response time is faster compared to 429MHz. The output is on a terminal block, allowing for easy embedded wiring. The MU3-OUT8-1216 can control contact information from a PC or CPU using the MU-3-1216, not just for communication between boards. When controlling from a PC, relay functionality can also be utilized, allowing control of contact information from locations several kilometers away. The relay station of the MU-3-1216 operates solely with initial device setup and power supply. To operate, pairing settings between the MU3-IN8-1216 and MU3-OUT8-1216 are required initially. This radio device allows the antenna to be installed in a location with good radio wave conditions using an extension cable. 【Features】 ■ Continuous communication of 8 contact information ■ Easy embedded wiring via terminal block ■ High isolation with photo MOS relays

MU3-RS2-429 and MU3-RS2-1216 are RS232C interface boards equipped with MU-3. They can be connected to a computer's COM port or RS232C devices. You can choose between the 429MHz band or the 1216MHz band. You can easily check the communication performance of MU-3 in combination with the evaluation program. 【Features】 ■ Equipped with MU-3 ■ Connects to a computer's COM port

The MU3-USB-429 and MU3-USB-1216 are USB interface boards equipped with the MU-3. They use the FTDI FT8U232BM USB-UART conversion chip. The power for the MU3-USB is supplied from the USB interface, so no external power source is required. You can choose between the 429MHz band and the 1216MHz band. You can easily check the communication performance of the MU-3 in combination with the evaluation program. 【Features】 ■ Equipped with MU-3 ■ Power supplied from USB interface ■ Recognized as a virtual COM port

MU4-RS2-429 is an RS232C interface board equipped with MU-4-429. It can be connected to a computer's COM port or RS232C devices. You can easily check the communication performance of the MU-4-429 in combination with the evaluation program. 【Features】 ■ Equipped with MU-4-429 ■ Connects to a computer's COM port

The MU4-USB-429 is a USB interface board equipped with the MU-4-429. It uses the FTDI FT8U232BM USB-UART conversion chip. The power for the MU4-USB-429 is supplied from the USB interface, so no external power source is required. You can easily check the communication performance of the MU-4-429 in combination with the evaluation program. 【Features】 ■ Equipped with MU-4 ■ Power supplied from USB interface