Siemens 6ES5858-0AA11 S5 Telecommunication Module

Siemens 6ES5858-0AA11 is the TK858 telecommunications device for SIMATIC S5, a dedicated modem-style module that enables telecommunication links for legacy PLC installations. Listed as 6ES5858-0AA11, the unit is also cataloged under alternate references such as 6ES5-858-0AA11 and is described in Siemens' S5 accessory literature as the TK858 Telecommunication Device. Weighing about 2.86 kg, this robust spare part is designed to replace a TK858 module in compatible S5 systems, ensuring continued remote data transmission and line interfacing when original components are unavailable. Typical applications include industrial automation setups where SIMATIC S5 controllers require telecommunication capabilities for remote monitoring or control, with the TK858 modem serving as the dedicated telecommunication device in these configurations. As a Siemens spare part, 6ES5858-0AA11 is intended for use by technicians familiar with S5 hardware and telecommunication hardware conventions.