CHAPTER 3: SETTING UP COMMUNICATION CARDS
RS-485 ADAPTER
D400 SUBSTATION GATEWAY USER’S MANUAL
GENERAL
39
Figure 16: RS-485 Mode - 12 KOhm (Single Unit Load))
Figure 17: RS-422 120 Ohm Line Termination on TX and RX
Figure 18: RS-422 120 Ohm Line Termination with 680 Ohm Pull-Up and Pull-Down
Resistors
1
2
3
ON
4
5
6
7
8
9
0
1
2
3
ON
4
5
6
7
8
9
0
1
2
3
ON
4
5
6
7
8
9
0