Found 3 entries in the GSD database.

Manufacturer
Product
Ident Number
GSD Revision
HW Revision
Last Update
GSD File
Bitmap_Device
Bitmap_Diag
Bitmap_SF
GETRIEBEBAU NORD
NORDAC profibus
0x7531
N/A
1.0
1998
nord7531.gsd
REXROTH
IndraDrive Fc (1.5Mbit/s)
0x7531
1
1.1
2005
rx017531.gsd
REXROTH
BRC: Variable Frequency Drive IndraDrive Fc
0x7531
1
1.31
2008
rx027531.gsd