I-7561 CR (USB to RS-232/422/485 Converter)

USB to RS-232/422/485 Converter with RS-485 Automatic Data Direction Control, Isolation Protection

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The I-7561 is a cost-effective module for transferring serial data via USB. It allows you to connect your serial devices to systems that use a USB interface. Connecting the I-7561 to a PC, you get one RS-232/422/485 port. Like the I-7520A, the I-7561 contains "Self Tuner" chip auto-tunes the Baud Rate and data format to the RS-485 network.The I-7561 module derives its power from the USB port and doesn't need any power adapter. It also features a high-speed 115.2 kbps transmission rate, and supports various O.S. independent RS-232/422/485 Ports.


  • Fully Compliant with the USB 1.1/2.0 (High Speed)
  • No External Power Supply required.
  • Baud Rate, 300 ~ 115200 bps
  • 3000 VDC Isolation Protection on the RS-232/422/485 side
  • ESD Protection for the RS-232/422/485 Data Line
  • Operating Temperatures, -25 °C ~ +75 °C
  • Driver Supports Windows 98/ME/2000/XP/Vista (32/64-bit)/7 (32/64-bit)/Linux
  • DIN-Rail



USB Compatibility: USB 1.1 and 2.0 standards
Serial Interface RS-232 TxD, RxD, GND The RS-232, RS-422 and RS-485 cannot be used simultaneously
RS-422 TxD+, TxD-, RxD+, RxD
RS-485 Data+, Data-
2-wire cabling/4-wire cabling

Belden 8941 (2P twisted-pair cable)/Belden

8942 (4P twisted-pair cable),

if different cables are used,
the transmission distance may change

RS-422/485 Transfer Distance

Max. 1,200 m at 9.6 kbps; Max. 400 m

at 115.2 kbps

Maximum Supported RS-485 Devices 256 (Without repeater)
Self-Tuner Asic Inside (RS-485) Yes
Speed 300 ~ 115200 bps
Connection RS-232/422/485 Removable 10-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 0.1A @ 5V = 0.5W, +/- 5%
Mechanical Plastic
Flammability UL 94V-0 materials
Dimensions 61 mm x 33 mm x 15 mm
Installation DIN-Rail
Operating Temperature -25°C ~ 75 °C
Storage Temperature -30°C ~ 75 °C
Ambient Relative Humidity 10% ~ 90% RH, non-condensing


I-7561 CR USB to RS-232/422/485 Converter (RoHS)
I-7561-G CR USB to RS-232/422/485 Converter (Gray Cover) (RoHS)
Include Cable CA-USB18 (1.8 m Cable) x 1


USB-2560 Industrial 4-port USB 2.0 Hub
CA-USB18 USB Type A to Type B Cable
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