Siemens CRT to LCD Upgrade Guide

Siemens SINUMERIK controls (810, 820, 840D, 850, 880) use various CRT display modules. The 6FC5103-0AB01 (DB-25, 840D), 6FC3988-7FA20 (850/880), and SM0901 (810M) are the most common models we replace.

Signal Compatibility

Siemens CRTs use TTL-level RGB signals through DB-25 or 15-pin D-Sub connectors. Our LCD modules accept these signals natively — no signal converter needed.