Philips PC-Link Manual page 5

SDA-SCL (J19) jumpers are used to activate the pull up resistors for SDA and
2
SCL pins of the I C interface.
SDA-SCL jumper
SDA SCL
SDA SCL
Important !
If more than one module are connected to I
jumpers of one of the modules need to be attached.
RS232 (J8) blue terminal is a connector for RS232 UART interface, TTL (J6)
blue terminal is a connector for TTL UART interface, while RS485 (J15) blue
terminal is a connector for RS485 UART interface.
J8 (RS232)
Pin Name
1 GND Ground reference
2 TX UART (RS232) output line from the module
3 RX UART (RS232) input line to the module
J6 (TTL)
Pin Name
1 GND Ground reference
2 TX UART (TTL) output line from the module
3 RX UART (TTL) input line to the module
J15
Pin Name
1 GND Ground reference
2 D- Data line (inverting –)
3 D+ Data line (non-inverting +)
J19
5
Function
Pull-up inactive
(jumper released)
Pull-up active
(jumper attached)
2 C-bus, then only the SDA-SCL
Function
Function
Function