SCANTECH ID (Champtek company) Discovery SG-20 - Manual (Page 32)

System Integration 24
INTERFACE SELECTION:
1. At the original Discovery with P/N A360102 the jumper setting for RS-422
interface must be:
The jumper location is described in section 4.2.
2. At the Discovery with P/N from A360104 onwards, the interface selection is
done electronically and can simply be carried out by using the 4 buttons of the
Discovery. See Chapter 5 for more details.
Installing the separator box
Installing the Separator Box (A3502031) converts the RS232 signal from the
back office system into a signal suitable for a single Discovery in RS-422 mode.
The box separates the Discovery’s electrically from the back office system by
using optocouplers. This prevents from damage due to ground potential
differences.
The box needs a 5 Vdc power adapter. See appendix A for plug types and pin
definitions.
Separator Box – Classic version