USB to Isolated RS-485 Converter
The tM-7561 is a cost-effective USB to RS-485 converter. Connecting the tM-7561 to a PC, you get one RS-485 port that allows you to access RS-485 devices through the USB interface. Like the I-7520, the tM-7561 contains “Self-Tuner” chip auto-tunes the baud rate and data format to the RS-485 network. The tM-7561 module derives its power from the USB port and doesn’t need external power adapter.



Request For Quotation






    • Fully Compliant with the USB 1.1/2.0 (High Speed)
    • Power and data flow indicator for troubleshooting
    • 2500 VDC Isolation Protection on the RS-485 side
    • Driver Supports Windows 98/ME/2000/XP (32/64-bit)/Vista (32/64-bit)/
      7 (32/64-bit)/8 (32/64-bit)/10/Linux
    • Tiny packaging fits on your DIN-Rail
    • No External Power Supply required
    • Automatic RS-485 Direction Control
    • Operating Temperatures, -25 °C ~ +75 °C
    • Low power consumption
    • Cost-effective Converter


    Comparison Table Repeater

    Models tM-7561 I-7561
    Serial Interface Only RS-485 RS-232/422/485
    Dimensions (W x H x D) 52 mm x 87 mm x 27 mm 72 mm x 115 mm x 35 mm
    Remarks Cost-effective, Entry-level Entry-level

    Hardware Specifications

    USB Compatibility: USB 1.1 and 2.0 standards
    RS-485 Data+, Data-
    RS-485 Transfer Distance Max. 1,200 m at 9.6 kbps; Max. 400 m at 115.2 kbps
    (Belden 9841 2P twisted-pair cable, if different cables are used, the transmission distance may change)
    Self-Tuner Asic Inside Yes
    Speed 300 ~ 115200 bps
    Connection RS-485 Removable 7-Pin Terminal Block
    USB Type B
    Cable Included CA-USB18 (1.8 m Cable) x 1
    LED Indicators
    Power Yes
    Input Voltage Range +5 VDC from USB
    Power Consumption 0.4 W
    Casing Plastic
    Flammability Fire-Retardant Materials (UL94-V0 Level)
    Dimensions (W x H x D) 52 mm x 87 mm x 27 mm
    Installation DIN-Rail
    Operating Temperature -25 °C ~ +75 °C
    Storage Temperature -30 °C ~ +75 °C
    Humidity 10 ~ 90% RH, non-condensing

    Hardware Structure

    Pin Assignment


    Ordering Informations

    tM-7561 CR USB to Isolated RS-485 Converter (RoHS)
    Include Cable CA-USB18 (1.8 m Cable) x 1