Below is a list of Blastronix manuals in PDF format.

232 and 422/485
232 2S PCI
232 2S1P PCI
232 4S PCI
232 4S RJ45
232 8S PCI

422 2S PCI
422 4S PCI
422 8S PCI

VCR/VTR Controller
2 Port PCI
4 Port PCI
8 Port PCI

Current Loop
2 Port PCI
4 Port PCI