USB/MPI+ V4.0:USB to RS485 isolated adapter for SIEMENS S7-200/300/400 PLC,replace 6ES7 972-0CB20-0XA0

Product Code: USB/MPI+ V4.0

Availability: In Stock

Price: $99.99


USB/MPI+ V4.0 is the USB to MPI and PPI protocol adapter, support S7-300/400 PLC MPI or S7-200 PLC PPI communication. It’s the same as Siemens PC Adapter USB except that this USB/MPI+ V4.0 doesn’t support profibus communication. Its driver is the Siemens PC_Adapter_USB driver, and choose the USB port, not the COM port.

The working power supply of this cable USB/MPI+ V 4.0 is directly from the USB port, but not the PLC programming interface.

USB/MPI+ V 4.0 is the optoelectronic isolated adapter for industrial design. There is anti-surging& anti-lightning protection circuit for the USB and RS485 interface. It support hot plug. It’s suitable for S7-300/400/200 series PLC. In particular, it applies to the strong interfere industrial scene and the safeguard in the circuit guarantees the safely running of the system.

USB/MPI+ principle and figure structure:


















Power On


Error Or Power off



Data exchange from PLC

Not Connected



Data exchange to PLC

No Data exchange


Indicator State


●    Support STEP7 V5.2 and higher,STEP7 Micro/Win 4.0 and higher
●    Fully compatible with USB V2.0
●    Power supply by USB port(100mA). with overcurrent Protection and Surge Protection
●    High optoelectronic isolation voltage up to 1000VDC
●    The USB port design with surge protection.
●    The RS485 port design with overcurrent protection and lightning
protection:Ipp=100A(10/700us,4KV) .Accord to the standard:ITU-TK20/21,VDE0433. ±15KV ESD Protection.
●    Baud rate of MPI port on PLC: 19.2Kbps,187.5Kbps,1.5Mbps. automatically adjust.
●    Baud rate of PPI port on PLC: 9.6Kbps,19.2Kbps,187.5Kbps.
automatically adjust.
●    Support long distance communication up to 1000m
●    Working temperature -20~+75'C
●    Length 3 meters.Color:black
●    One pc supports one USB programming cable only



About Long Distance Communication
For USB/MPI+ V4.0, the largest communication distance is up to 1000m at the communication speed of 187.5Kbps. It needs to splice 120ohm terminal resistance between 3 and 8 pin on the RS485 port(DB9 Male) to eliminate signal reflection. But requires one PFB-G for each PLC.





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