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Example: Daisy-chained RS232 with one COM port
Supported display connection congurations
RS-232C
IN
RS-232C
OUT
RS-232C IN and OUT
RS-232C
IN
RS-232C
OUT
LAN
RS-232C IN, OUT, and LAN
In this example, the host PC has one RS232 COM port, and all displays are daisy-chained together via RS232. Each
display must have a unique MONITOR ID since they are all on the same daisy-chain. The RS232 OUT on the rst
display is connected to the RS232 IN on the next, etc.
RS232 IN
RS232 OUT
RS232 IN
RS232 OUT
RS232 IN
RS232 OUT
RS232 IN
ID 1
RS232
Display 1
ID 2
RS232
Display 2
ID 3
RS232
Display 3
ID 4
RS232
Display 4
PC
COM1
Note: For RS232 daisy-chains, the cable connections between displays does not need to follow the same ordering as the ID
assignments. In this example the daisy-chain is connected in order 1 - 2 - 4 - 3.
Notice that all displays are accessed using the same COM port, even though only the rst display is actually connected
to the host PC.
53 | NEC PD COMMS TOOL - USER’S GUIDE
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