SCANTECH ID (Champtek company) Discovery SG-20 - Manual (Page 37)

Scantech-ID Discovery SG-20 29
The box needs a 5 Vdc power adapter. See appendix A for plug types and pin
definitions .
IMPORTANT
For RS-485 network configurations only use network boxes with
PN: A361501 or higher.
Network Box (Classic)
Next to the Classic Version shown above, there is another version, the Network
Box Version 2.
For your ease this version is fully backward compatible with the Classic Version.
However it has some additional connecting options for the power supply and
the serial cable to the host and moreover it has a higher maximal
communication speed. So Version 2 can act as a full replacement for the
Classic Version.