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. As an authorized ICP DAS reseller, we can bid on RFQ's for any ICP DAS part numbers even if they are not found on our website. Contact your L-com Sales Representative to request a non-obligatory quote.