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NE-4100 Series User’s Manual
Panel Layout and Pin Assignments
2-13
NE-4120A Block Diagram
1 MB SDRAM
2 MB Flash
10/100 M
Ethernet PHY
+5 VDC
MAC
80186 CPU
Transformer
1.5 KV isolation
UART0
Tx
Rx
Customer’s device
Ready
LED
RS-422/485
interface
Tx+ Tx-
Rx-
Rx+
Serial console
interface
Line
Driver
Line
Driver
UART1
GPIO Port
PIO0 - PIO3
10M
LED
100M
LED
RS-422/485
Signal
Pin header
RSPSupply - 1-888-532-2706 - www.RSPSupply.com
http://www.RSPSupply.com/p-9766-Moxa-NE-4120A.aspx