Kramer Electronics VS-4228 - Manual (Page 16)

VS-4228 - Connecting the VS-4228 13
3. If shielded cable is used for an RS-485 connection, connect the shield to the
Ground PIN.
Figure 9 illustrates the RS-485 line that connects:
•
Between each VS-4228 unit
•
To the PC via a Kramer Tools VP-43xl Interface Converter
(connect the PC’s 9-pin D-sub COM port to the “RS-232 in” 9-pin
D-sub (F) port on the VP-43xl. Next, connect the RS-485 port on
the VP-43xl to the RS-485 ports on the VS-4228 units)
Figure 9: Cascading Units via the RS-485 Control Interface
Note: When cascading multiple units using the RS-485 interface,
you must connect a 100Ω terminator between the + and – pins of
the last VS-4228 on the line. i