Siemens 6GK1143-0TA01 | SIMATIC Communications Processor

The 6GK1143-0TA01 connects SIMATIC S5 controllers to industrial Ethernet networks. This communications processor handles all telegram processing independently from the CPU. It offloads network communication tasks, freeing the main processor for logic execution. Consequently, your system runs more efficiently with faster response times.

You can configure this module for TCP/IP or ISO protocols as needed. The 6GK1143-0TA01 supports both RFC 1006 and ISO-on-TCP standards. It also provides a transparent interface for message frame transmission. Therefore, engineers gain flexible connectivity options for various applications.

Memory Architecture and Data Handling

The module includes dedicated dual-port RAM for data exchange. This memory arrangement allows simultaneous access from both CPU and network sides. The 6GK1143-0TA01 stores configuration data in non-volatile memory. It retains all parameters even after a complete power loss.

A small capacitor provides short-term energy for critical operations. This energy storage maintains the internal clock for approximately 30 minutes. The 6GK1143-0TA01 does not rely on replaceable batteries for this function. Below is a complete breakdown of its technical characteristics.

Specification	Detail
Product Type	CP 143 TF Communications Processor
Network Protocol	TCP/IP, ISO, RFC 1006, ISO-on-TCP
Interface Type	15-pin D-sub female (AUI)
Dual-Port RAM	8 KB (Shared memory)
Configuration Memory	16 KB (Non-volatile)
Energy Storage	Capacitor (30 minutes clock backup)
Dimensions (H x W x D)	250 mm x 25 mm x 190 mm
Weight	0.48 kg (Approx.)

Interface Layout and Connection Details

A single 15-pin D-sub female connector serves as the network interface. The 6GK1143-0TA01 requires an external AUI transceiver for twisted pair or fiber. This module occupies one standard slot in the S5-115U or S5-135U rack. Three status LEDs indicate RUN, STOP, and data exchange activity.

You must connect the module to an external 24V DC power source. The 6GK1143-0TA01 does not draw its operating voltage from the backplane alone. A separate two-pin terminal block provides this auxiliary power input. Therefore, the CP continues functioning even during backplane interruptions.

Operational Benefits for Network Integration

This communications processor enables remote access to legacy S5 systems. The 6GK1143-0TA01 supports data exchange with modern SIMATIC S7 controllers. It also allows connection to SCADA systems and engineering workstations. Engineers value this capability for gradual plant modernization projects.