PBX-21:
PROFIBUS box system, I/O base module or coupler fr 4 sub modules
TR__AAAA.GSD: Device database file (german)
TRAAAATD.200: Type file COM-ET-200 S5,S7/DOS (german)
TRAAAAAX.200: Type file COM-ET-200 S5,S7/Windows (german)
PBX21_CN.BMP: Bitmap normal operation
PBX21_CS.BMP: Bitmap fault case




DOCUMENTATION:

TRS-V-BA-D-0077 (german) 
TRS-V-BA-GB-0077 (english)