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The ULI-211C is an industrial converter that converts RS-232/422/485 signals to multimode optical fiber. It supports communication speeds of up to 115.2kbps (RS-232) / 460.8kbps (RS-422/485) and can extend signals up to 4km. With 2kV optical isolation protection, it safeguards equipment from electrical noise and surges. It is compatible with Modbus ASCII/RTU and achieves high reliability with optical communication that has EMI/RFI resistance. It supports DIN rail mounting and operates stably in harsh environments with a wide operating temperature range of -40 to 80°C. An external power supply (10-30VDC) is required.

The ULI-211CI is an industrial converter that converts RS-232/422/485 signals to multimode optical fiber, achieving both noise resistance and long-distance transmission. With three-way isolation (2kV) for input, output, and power supply, it protects equipment from surges and ground loops. It standardly supports Modbus ASCII/RTU, making it easy to connect to control devices. It can be extended up to 15 km with multimode optical fiber using ST connectors. It features an IP20 plastic housing suitable for DIN rail mounting and can operate in a wide temperature range of -40 to 85°C. It operates on an external power supply of 10-48VDC, and termination/bias can be switched via a switch. It enables reliable serial communication in environments with high EMI/RFI, such as factories, energy facilities, and transportation infrastructure.

The ULI-211E is a highly reliable serial-to-fiber optic converter designed for power substations and industrial equipment. It converts RS-232/422/485 signals to multimode fiber optic, allowing for extension up to 2 km. It complies with IEC61850-3 and IEEE1613, meeting the stringent environmental requirements of the power industry. With input, output, and power isolation protection, it safeguards equipment from surges and noise. It supports Modbus ASCII/RTU and achieves high reliability through fiber optic communication with EMI/RFI resistance. Housed in an IP30 metal enclosure suitable for panel mounting, it can operate in a wide temperature range of -40 to 85°C.

The ULI-212CI is an industrial converter that converts RS-232/422/485 signals to single-mode optical fiber. It supports communication speeds of up to 115.2 kbps and can extend signals up to 15 km. With input, output, and power isolation protection, it safeguards equipment from surges and noise. It is compatible with Modbus ASCII/RTU and achieves high reliability with optical communication that has EMI/RFI resistance. It comes in an IP30 plastic housing suitable for DIN rail mounting and can operate in a wide temperature range of -40 to 85°C. An external power supply (10-48 VDC) is required.

The ULI-213CI is an industrial converter that converts RS-232/422/485 signals to single-mode optical fiber. It supports communication speeds of up to 115.2 kbps and can extend signals up to 15 km. With input, output, and power isolation protection, it safeguards equipment from surges and noise. It is compatible with Modbus ASCII/RTU and achieves high reliability with optical communication that has EMI/RFI resistance. It comes in an IP30 plastic housing suitable for DIN rail mounting and can operate in a wide temperature range of -40 to 85°C. An external power supply (10-48VDC) is required.

The ULI-213E is a highly reliable serial-to-fiber optic converter designed for power substations and energy facilities. It converts RS-232/422/485 signals to single-mode fiber optic, allowing for extension up to 15 km. It complies with IEC61850-3 and IEEE1613, meeting the stringent environmental requirements of the power industry. With input, output, and power isolation protection, it safeguards equipment from surges and noise. It supports Modbus ASCII/RTU and achieves high reliability through fiber optic communication with EMI/RFI resistance. The IP30 metal housing is suitable for panel mounting and can operate in a wide temperature range of -40 to 85°C.

ULI-321D is an industrial USB-to-serial converter that adds an RS-232 port to a PC's USB port. It supports USB 2.0 full speed (12Mbps) and enables high-speed data transfer of up to 921.6kbps for RS-232 communication. Powered by the USB port, it requires no external power supply and features a compact inline design, making it ideal for space-saving installation in control panels and field applications. It is compatible with serial communication devices such as Modbus RTU and can be easily set up on Windows 8/10/11 and Linux (Ubuntu). It comes with a USB cable for immediate use and is a highly reliable model suitable for field service and testing equipment.

The ULI-223D is an industrial converter that converts RS-232 signals (TD/RD) into balanced RS-422 signals, extending communication distances up to 1.2 km. It adopts a port-powered method, obtaining power from the RS-232 handshake lines (DTR/RTS), eliminating the need for an external power supply. It supports bidirectional communication and a maximum data rate of 115.2 kbps. With its compact inline design, it is ideal for space-saving installation in control panels and on-site. It is compatible with Windows and serial communication devices, making it useful for field service and testing equipment.

The ULI-223T is an industrial converter that converts RS-232 signals to RS-422, extending communication distances up to 1.2 km. In addition to port power supply, it supports an external power source (12VDC) for stable operation. The RS-422 side uses terminal block connections, making it ideal for control panels and field wiring. It supports bidirectional communication and a maximum data rate of 115.2 kbps. This model is perfect for applications that require flexible installation and high reliability in the field.

The ULI-224T is an industrial converter that converts RS-232 signals to RS-422/485, extending communication distances up to 1.2 km. In addition to port power supply, it supports an external power source (12VDC) for stable operation. The RS-422/485 side uses terminal block connections, making it ideal for control panels and field wiring. It supports bidirectional communication and a data rate of up to 115.2 kbps. This model is perfect for applications requiring flexible installation and high reliability in conjunction with serial communication devices such as Modbus RTU.

The ULI-224D is an industrial converter that converts RS-232 signals to RS-422/485, extending communication distances up to 1.2 km. It adopts a port-powered method, obtaining power from the RS-232 handshake line, so no external power supply is required. It supports bidirectional communication and a maximum data rate of 115.2 kbps. The RS-422/485 side uses a DB9 connector, making it ideal for easy connections in control panels and on-site. It is compatible with serial communication devices such as Modbus RTU and can also be used for field services and testing equipment.

The ULI-224TB is an industrial converter that converts RS-232 signals to RS-422/485, extending communication distances up to 1.2 km. Its main features include three types of power options: 1) powered by the RS-232 port, 2) external power supply (12VDC), and 3) battery operation using two AA batteries. This allows for flexible use in low-power ports or in environments where securing power is difficult, such as with laptops. It supports bidirectional communication and a maximum data rate of 115.2 kbps. With terminal block connections, it is ideal for control panels and field wiring. It is also compatible with industrial protocols such as Modbus RTU, making it a highly reliable model suitable for field services and testing equipment.

The ULI-224TCL is an industrial converter that converts RS-232 signals to RS-422/485, extending communication distances up to 1.2 km. With 2 kV optical isolation, it protects equipment from voltage surges and ground loops, ensuring reliable communication. The RS-422/485 side uses terminal block connections, making it ideal for control panels and field wiring. An external power supply (12VDC) is required to guarantee stable operation. It supports bidirectional communication and a maximum data rate of 115.2 kbps. It is also compatible with industrial protocols such as Modbus RTU, making it perfect for use in critical equipment.

The ULI-224TC is an industrial converter that converts RS-232 signals to RS-422/485, enabling long-distance communication of up to 1.2 km. With 2 kV optical isolation, it protects the data lines and safeguards equipment from voltage surges and ground loops. Its compact design is compatible with DIN rail mounting, making it ideal for control panels and factory networks. It supports industrial protocols such as Modbus RTU and offers a communication speed of up to 19.2 kbps. An external power supply (10-30 VDC) is required to ensure stable operation.

The ULI-224TCI is an industrial converter that converts RS-232 signals to RS-422/485, enabling long-distance communication of up to 1.2 km. With three-way isolation (input, output, power), it protects equipment from voltage surges and ground loops, ensuring high reliability in harsh industrial environments. It has obtained UL Class 1/Division 2 certification, making it suitable for hazardous areas such as oil and gas. It supports industrial protocols like Modbus RTU and Allen-Bradley DH485, with a communication speed of up to 115.2 kbps. An external power supply (10-48VDC) is required.

The ULI-224TH/THC is an industrial converter that converts RS-232 signals to RS-422/485, achieving high-speed communication of up to 460.8kbps and long-distance transmission of up to 1.2km. Both models feature a robust metal housing suitable for panel mounting and support industrial protocols such as Modbus RTU. The ULI-224TH is a non-isolated version with a standard temperature range (0 to +70°C), making it ideal for relatively stable environments like control panels. On the other hand, the ULI-224THC supports **2kV optical isolation and a wide temperature range (-40 to +80°C)**, making it perfect for harsh industrial environments or locations requiring isolation protection. Both models require an external power supply (10 to 30VDC).

The ULI-224TE is an industrial RS-232 to RS-422/485 converter that is ideal for power equipment and substation applications. It features three-way isolation (input, output, power) and complies with IEC61850-3 and IEEE1613, making it suitable for the harsh electromagnetic environment of the power sector. It supports industrial protocols such as Modbus RTU and offers communication speeds of up to 115.2 kbps. The robust metal housing is designed for panel mounting and operates within a wide temperature range of -40 to +85°C. An external power supply (10-48VDC) is required.

ULI-226D is an industrial converter that converts RS-232 signals to RS-485 and supports power over the port. It uses DB9 connectors on both the RS-232 and RS-485 sides, making it ideal for easy connections in control panels and testing equipment. It does not require an external power supply and supports communication speeds of up to 115.2 kbps and long-distance transmission of up to 1.2 km.

The ULI-226T is an industrial converter that converts RS-232 signals to RS-485, featuring terminal block connections on the RS-485 side. In addition to port power supply, it supports external power sources (12-16VDC) for stable operation. It supports communication speeds of up to 115.2kbps and long-distance transmission of up to 1.2km, making it ideal for control panels and field wiring.

The ULI-314DC is an industrial USB-to-serial converter that can add four RS-232/422/485 ports to a PC's USB port. It supports USB 2.0 (up to 480Mbps) and serial communication at speeds of up to 921.6kbps. With 2kV port-to-port isolation, it provides electrical separation between the upstream PC and downstream devices, as well as between each port, protecting equipment from voltage surges and ground loops. It features a robust metal housing, is compatible with DIN rail and panel mounting, and operates in a wide temperature range of -40 to +85°C. It has obtained UL Class 1/Division 2 certification, making it ideal for harsh industrial environments. It also supports industrial protocols such as Modbus RTU, providing reliable communication for control panels and field services.

ULI-321DC is an industrial USB-to-serial converter that adds an RS-232 port to a PC's USB port. It supports USB 2.0 full speed (12Mbps) and RS-232 communication at speeds up to 460.8kbps. With 2kV optical isolation, it protects equipment from voltage surges and ground loops, ensuring reliable communication. Powered through the USB port, it requires no external power supply and features a robust housing compliant with IP30, making it ideal for control panels and field installations. It supports connections with serial communication devices such as Modbus RTU and can be easily set up on Windows 7/8/10/11 and Linux (Ubuntu). It comes with a USB cable for immediate use and is a highly reliable model suitable for industrial applications and testing equipment.

ULI-321DK is an industrial USB-to-serial converter that adds an RS-232 port to a PC's USB port. It supports USB 2.0 full speed (12Mbps) and enables high-speed data transfer of up to 921.6kbps for RS-232 communication. With a fixed serial number, the COM port number remains unchanged even when shared among multiple PCs, simplifying setup tasks in the field. Powered via the USB port, it requires no external power supply and features a compact inline design, making it ideal for control panels and field services. It can be easily set up on Windows 7/8/10/11 and Linux (Ubuntu).

ULI-321DK is an industrial USB-to-serial converter that adds an RS-232 port to a PC's USB port. It supports USB 2.0 full speed (12Mbps) and enables high-speed data transfer of up to 921.6kbps for RS-232 communication. The locking serial number feature ensures that the COM port number remains fixed even when shared among multiple PCs, simplifying setup work in the field. Powered via the USB port, it requires no external power supply and features a compact inline design, making it ideal for control panels and field services. It can be easily set up on Windows 7/8/10/11 and Linux (Ubuntu). It comes with a USB cable for immediate use and is a highly reliable model perfect for connecting to test equipment and industrial devices.

The ULI-341 series is an industrial USB-to-serial converter that adds RS-422/485 ports to a USB port. It supports USB 2.0 (up to 12Mbps) and serial communication at up to 460.8kbps. With 2kV optical isolation, it protects devices from voltage surges and ground loops, supporting stable communication in factories and control panels. It features a high-retention USB Type B connector, designed to prevent cable disconnection even in vibrating environments. Its compact housing allows for easy inline installation. There are three models in the lineup, which can be selected based on application: - ULI-341TC with terminal block connection - ULI-341TCK with terminal block connection and fixed serial number - ULI-341DC with DB9 connection

The ULI-342TC is an industrial USB-to-serial converter that adds two RS-422/485 ports to a USB port. It supports USB 2.0 (up to 480Mbps) and serial communication at speeds of up to 921.6kbps. With 3kV optical isolation, it provides electrical separation between the upstream PC and downstream devices, as well as between each port, protecting equipment from voltage surges and ground loops. Its robust design is suitable for DIN rail mounting, making it ideal for control panels and factory networks. It also supports industrial protocols such as Modbus RTU, providing reliable communication in harsh environments.

The ULI-344TC is an industrial USB-to-serial converter that can add four RS-422/485 ports to a USB port. It supports USB 2.0 (up to 12 Mbps) and serial communication at speeds of up to 921.6 kbps. With 2 kV optical isolation, it provides electrical separation between the upstream PC and downstream devices, as well as between each port, protecting the equipment from voltage surges and ground loops. It features a robust metal housing and is suitable for panel mounting, making it ideal for control panels and factory networks. It also supports industrial protocols such as Modbus RTU, providing high-reliability communication for simultaneous connections of multiple devices in the field.

The ULI-351/361 series (DB9) is a compact USB to RS-485 converter that adds an RS-485 port to a PC's USB port. It supports USB 2.0 (12Mbps) and serial communication at speeds up to 921.6kbps. Powered by USB bus power (low power consumption <100mA), it does not require an external power supply and comes with a 0.9m USB cable. Its small housing is suitable for inline installation, making it ideal for field service and mobile applications. The 351 series supports 4-wire RS-485, while the 361 series supports 2-wire RS-485. Additionally, the DK model allows for uniform COM port numbers across multiple PCs with a fixed serial number, simplifying setup during shared operations. The driver uses FTDI VCP and operates on Windows XP to 11 and Ubuntu. It has an operating temperature range of 0 to 70°C, providing stable communication even in industrial environments.