{"product_id":"siemens-6es7901-3cb30-0xa0-industrial-automation-module","title":"Siemens 6ES7901-3CB30-0XA0 Industrial Automation Module","description":"\u003ch2\u003eProduct Overview: Siemens 6ES7901-3CB30-0XA0 PC\/PPI Multi-Master Cable\u003c\/h2\u003e\u003cp\u003eThe Siemens 6ES7901-3CB30-0XA0 is a dedicated PC\/PPI multi-master cable designed for the SIMATIC S7-200 family. It connects the S7-200 CPU to a serial PC interface, enabling reliable communication via RS-232 and RS-485. This cable supports Freeport (ASCII) and GSM modem protocols, making it a versatile tool for remote monitoring and programming. Its integrated isolation prevents ground loops and signal degradation, a common failure point in industrial automation setups.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransmission Rate:\u003c\/strong\u003e Up to 187.5 kbit\/s (selectable via DIP switch: 9.6 \/ 19.3 \/ 187.5 kbit\/s)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtocols:\u003c\/strong\u003e PPI (10\/11 bit), ASCII (Freeport)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Supply:\u003c\/strong\u003e Derived from the CPU (no external power required)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiagnostics:\u003c\/strong\u003e LED indicators: Tx (green) for RS-232 transmit, Rx (green) for RS-232 receive, PPI (green) for RS-485 transmit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIsolation:\u003c\/strong\u003e Potential separation exists (galvanic isolation)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e Approximately 300 g\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation and Setup Guide\u003c\/h2\u003e\u003cp\u003eInstalling the Siemens 6ES7901-3CB30-0XA0 is straightforward. Connect the RS-232 end to the PC serial port (or USB-to-serial adapter) and the RS-485 end to the S7-200 PPI port. Use the onboard DIP switch to set the desired baud rate (9.6, 19.3, or 187.5 kbit\/s) matching your network configuration. The cable’s 90-degree connector eases installation in tight panels. Ensure termination and bias settings are correct for multi-drop networks.\u003c\/p\u003e\u003ch2\u003eMaintenance and Reliability\u003c\/h2\u003e\u003cp\u003eThis cable is designed for long-term industrial use. Its galvanic isolation prevents common ground-loop failures, reducing downtime. Periodically inspect the LEDs: a constant green on Tx or Rx confirms active communication. Keep the cable away from high-voltage sources to avoid interference. With no moving parts, the Siemens 6ES7901-3CB30-0XA0 requires minimal maintenance—clean connectors with isopropyl alcohol if needed.\u003c\/p\u003e\u003ch2\u003eCompatibility and Integration\u003c\/h2\u003e\u003cp\u003eThe Siemens 6ES7901-3CB30-0XA0 works exclusively with SIMATIC S7-200 CPUs (e.g., CPU 221, 222, 224, 226). It supports PPI protocol for programming and SCADA integration, and ASCII-based Freeport for custom device communication. The cable also interfaces with GSM modems, enabling remote diagnostics via SMS. It cannot be used with S7-300\/400 or other PLC families without additional adapters.\u003c\/p\u003e\u003ch2\u003eSelection Guide and Purchasing Advice\u003c\/h2\u003e\u003cp\u003eBefore purchasing, verify that your PC has an available serial port or a reliable USB-to-serial adapter. For long-distance runs up to 1200 m, use proper RS-485 cabling with the Siemens 6ES7901-3CB30-0XA0. This cable is ideal for replacing older non-isolated or fixed-baud PPI cables. For genuine Siemens quality, order from ubest101, a trusted supplier of industrial automation spares.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default","offer_id":44411051212899,"sku":"6ES7901-3CB30-0XA0","price":238.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/8635\/0435\/files\/6ES7901-3CB30-0XA0_7d59f27f-f9f2-44a1-abe9-fa7c34f41d7d.jpg?v=1785215480","url":"https:\/\/www.plcsourcepro.com\/products\/siemens-6es7901-3cb30-0xa0-industrial-automation-module","provider":"PLC Source PRO","version":"1.0","type":"link"}