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USB/MPI+ V4.0: USB to RS485 isolated adapter for SIEMENS S7-200/300/400 PLC

Introduction



USB/MPI+ V4.0 is the USB to MPI and PPI protocol adapter, supportS7-300/400PLC MPI orS7-200PLC 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:


Indicator

ON

Flash

Off

PWR USB

Power On

Error

Error Or Power off

RxD

Error

Data exchange from PLC

Not Connected

TxD

Error

Data exchange to PLC

No Data exchange

Indicator State

Functions
- 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.