Do-more H2 Series PLC User Manual, 1st Edition, Rev. F - H2-DM-M
7–33
Chapter 7: Specifications - Specialty Modules
1
2
3
4
5
6
7
8
9
10
11
12
13
14
A
B
C
D
RS-422
TXD+
TXD-
GND
GND
RX+
RX-
TX-
TX+
SERIO-4
GND
RX+
RX-
TX-
TX+
Slave 1
Last Slave
User Supplied
120Ω Termination
Resistor
(H2-SERIO-4 contains an optional 120Ω
termination resistor between RX+ and RX-; use
DIP switch S2 to activate or deactivate resistor.)
GND
RX+
RX-
TX-
TX+
Slave 2
(D-) RXD-
(D+) RXD+
Set DIP switch S2 on the H2-SERIO-4 to:
1. Activate or deactivate the internal 120Ω termination resistor.
2. Select RS-422 or RS-485 operation.
RS-485
GND
TXD+
TXD-
(D-) RXD-
(D+) RXD+
SERIO-4
GND
D+
D-
Slave 1
GND
D+
D-
Last Slave
User Supplied
120Ω Termination
Resistor
GND
D+
D-
Slave 2
(H2-SERIO-4 contains an optional 120Ω
termination resistor between RX+ and RX-; use
DIP switch S2 to activate or deactivate resistor.)
H2-SERIO-4 Wiring: RS-422/485
OFF
RS422
ON
RS485
NOTE: Set DIP Switch for
desired configuration
NO TERM
120 OHM
Содержание Do-more H2 PLC Series
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