The 6ES7742-2AC20-0AA0 is a Siemens SIMATIC PG740 PIII programming device — a field programmer for S7-300/400, S5, and S7-200 controllers. It ships with a 13.3-inch XGA-TFT display, a Pentium III 800E processor, 128 MB of RAM, and a 20 GB hard drive loaded with STEP5 V7.15, STEP7 V5.1 SP1, Micro/WIN V3.11 SP1, and Windows 98 SE in German.
Siemens 6ES7742-2AC20-0AA0 SIMATIC PG PG740 PIII, mature lif
MPN6ES7742-2AC20-0AA0
Siemens SIMATIC PG PG740 PIII, 13.3" XGA-TFT, PIII 800E, 128 MB RAM, 20 GB HD, STEP5 V7.15, STEP7 V5.1 SP1, MICRO/WIN V3.11 SP1, WIN98 SE GERMAN, 6ES7742-2AC20-0AA0.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Product details
Frequently asked questions
What is the closest replacement for this programmer?
There is no pin-compatible or drop-in replacement from Siemens for this exact order code. The closest functional successor is a current SIMATIC Field PG (e.g., 6ES7711-7AA00-0AA0 or similar) with a separate software license for STEP5/STEP7/Micro/WIN. That requires a hardware migration and a software license purchase — not a simple swap.
What software and OS does this unit come with?
It is loaded with STEP5 V7.15, STEP7 V5.1 SP1, Micro/WIN V3.11 SP1, and Windows 98 SE — all in German. The hard drive is 20 GB.
How do I source this part?
Submit an RFQ. We locate stock through our surplus and broker network. No firm lead time or price can be stated here — each quote is lot-specific.
MPN
6ES7742-2AC20-0AA0