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17
G E T T I N G S TA R T E D
17
M U LT E N E T P O C K E T P A D
RS485 (Half Duplex) Configuration
KEY
DB9 Male Interface
RS485 Termination Enabled
PIN
DESCRIPTION
DIP1 - 1
RX TM
OFF
DIP1 - 2
TX TM
ON (if placed at beginning/end of network - Terminated)
DIP2 - 1
RX-
ON (RS422/RS485)
DIP2 - 2
TX-
ON (RS422/RS485)
DIP2 - 3
TX+
ON (RS422/RS485)
DIP2 - 4
RX+
ON (RS422/RS485)
DIP3 - 1
HRX-
OFF (RS232)
DIP3 - 2
HTX-
OFF (RS232)
DIP3 - 3
HTX+
OFF (RS232)
DIP3 - 4
HRX+
OFF (RS232)
DIP4 - 1
RX+/TX+
ON (Half Duplex - RX+ = TX+)
DIP4 - 2
RX-/TX-
ON (Half Duplex - RX- = TX-)
DIP5 - 1
-
-
DIP5 - 2
SEL
ON (enable RS422/RS485 operation)
RS485 (Half Duplex) DIP Switch Settings
PIN
SIGNAL
DESCRIPTION
3
TX-/RX-
OUT
DATA NEGATIVE
5
GND
-
SIGNAL GROUND
7
TX+/RX+
OUT
DATA POSITIVE
RS485 DB9 Serial Interface Pinout
Содержание PocketPAD Power over Ethernet
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