The 1756-L71 mainly feature 2MB user memory and 0.98 MB I/O memory.
It is also shipped with a 1784-SD1 Secure Digital (SD) memory card
amounting to 1 GB non-volatile memory
which can be upgraded to 2GB by replacing with 1784-SD2 card.
Manager Steve quotes to you
cn@mooreplc.com 
+8618005028963
+86-18005028963 
+86-18005028963
