Hitachi HX-RIO3 Series User Manual page 15

15
5.2 G-Bus Pin Description
Communication between the RIO3 series and the expansion module as well as system / field power supply
of the bus modules is carried out via the internal bus. It is comprised of 6 data pin and 2 field power
ping
No. Name
1 Vcc
2 GND
3 Token Output
4 Serial Output
5 Serial Input
6 Reserved
7 Field GND
8 Field Vcc
Description
System supply voltage (5V dc).
System Ground.
Token output port of Processor module.
Transmitter output port of Processor module.
Receiver input port of Processor module.
Reserved for bypass Token.
Field Ground.
Field supply voltage (24Vdc).
Do not touch data and field power pins in order to avoid soiling and damage by ESD
noise.
HX-RIO3 Series