Siemens 6ES5512-3HC11 Interface Board

Versatile Communication Interface for S5 Automation

The Siemens 6ES5512-3HC11 interface board facilitates communication between S5-135U and S5-155U PLCs and external devices. This board handles data exchange with printers, barcode readers, and other serial equipment. Manufacturing systems rely on this board for seamless integration of peripheral devices.

Technical Specifications and Communication Features

This interface board features a dedicated RS-232C port with a 9-pin D-sub connector for device connectivity. The port supports data rates from 300 bps to 38.4 kbps with software-selectable parameters. An integrated 4 KB buffer stores incoming and outgoing messages for reliable data exchange. Furthermore, the board includes hardware handshake lines for flow control.

Parameter	Specification
Brand	Siemens
Model	6ES5512-3HC11
Product Type	Interface Board / Serial Communication
Interface	RS-232C (9-pin D-sub)
Data Rates	300 bps to 38.4 kbps
Buffer Memory	4 KB
Handshake	Hardware (RTS/CTS)
Protocol Support	ASCII, custom
Dimensions (W x H x D)	50 mm x 125 mm x 118 mm
Weight	0.38 kg
Power Consumption	5 V DC at 250 mA
Compatible CPUs	S5-135U, S5-155U
Operating Temperature	0°C to 55°C

Data Handling and Flow Control

The Siemens 6ES5512-3HC11 utilizes hardware handshake lines for reliable data flow control. The 4 KB buffer prevents data loss during high-speed transmissions. Users can configure data bits, stop bits, and parity through the STEP 5 software. Additionally, the board supports both half-duplex and full-duplex communication modes.

Physical Design and Installation

This interface board features a 50 mm housing that fits standard S5-135U and S5-155U rack slots. The unit weighs approximately 0.38 kilograms, allowing straightforward installation. A 9-pin D-sub connector on the front panel provides the serial interface. The board includes LED indicators for power and data transmission status.

System Integration and Configuration

You can install this interface board in any standard S5-135U or S5-155U rack slot. The board automatically maps to the CPU’s I/O address space for data access. Users configure communication parameters using the STEP 5 programming software. Moreover, the board supports custom protocol definition for specialized equipment integration.

Diagnostic Features and Status Monitoring

Front-panel LEDs indicate power, transmit activity, receive activity, and error conditions. The board stores diagnostic information about communication errors in an internal buffer. A built-in loopback test verifies port functionality during system startup. Furthermore, the board supports remote diagnostics through the backplane bus.