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ZEUS Technical Manual Connectors, LEDs and jumpers
© 2007 Eurotech Ltd Issue D 88
J19 – Serial ports – COM3/4
Connector: Oupiin 3012-20GRB W/ROHS, 20-way, 2.54mm (0.1") dual row IDC boxed
header
Mating connector: FCC 71600-020LF
Pin Signal name Pin Signal name
1 I2C_SCL 2 I2C_SDA
3 GND (I²C ) 4 3.3V (I²C )
5 TX4+ (RS422)
(TX4+/RX4+ RS485)
6 TX4- (RS422)
(TX4-/RX4- RS485)
7 RX4+ (RS422) 8 RX4- (RS422)
9 GND 10 GND
11 DCD3 12 DSR3
13 RX3 14 RTS3
15 TX3 16 CTS3
17 DTR3 18 RI3
19 GND 20 NC
As viewed from the connector pins
1
2
19
20