Siemens 6ES7120-0AH01-0AA0 Programmable Logic Controller Module

Siemens 6ES7120-0AH01-0AA0 is a TB16SC 16-channel screw-terminal block designed to expand SIMATIC SC systems with analog and digital SC electronic modules, providing reliable field-wiring connections for backplane or panel-mount configurations. As a spare-part accessory, it is intended to accompany compatible expansion modules and is listed by Siemens as PM500 discontinued, with an official end-of-life date of October 1, 2017, indicating it may be unavailable or limited in stock. The unit has a net weight of 0.277 kg and packaged dimensions of 10.60 x 11.90 x 4.70 cm, reflecting a compact form factor suitable for integration in legacy SIMATIC SC installations. Originating from Germany and carrying the exact part number 6ES7120-0AH01-0AA0, this TB16SC terminal block serves as a dedicated expansion interface, enabling secure screw-terminal connections for auxiliary signals in 16-channel expansion scenarios. Although positioned for legacy SIMATIC SC configurations, the TB16SC terminal block exemplifies Siemens' modular approach to terminal wiring, offering straightforward installation and secure screw-term connections for 16-channel expansion in control cabinets.