4
RS232 PORTS
The G308 has two RS232 ports. There is the PGM port and the COMMS port.
Although only one of these ports can be used for programming, both ports can
be used for communications with a PLC.
The RS232 ports can be used for either master or slave protocols with any
G308 configuration.
Examples of RS232 communications could involve another Red Lion product
or a PC. By using a cable with RJ12 ends on it, and a twist in the cable, RS232
communications with another G3 product or the Modular Controller can be
established. Red Lion part numbers for cables with a twist in them are
CBLPROG0
1
, CBLRLC01
2
, or CBLRC02
3
.
G3 RS232 to a PC
G308 PORT PIN OUTS
Connections
G3: RJ12
Name
PC: DB9
Name
4
COMM
1
DCD
5
Tx
2
Rx
2
Rx
3
Tx
N/C
4
DTR
3
COM
5
GND
N/C
6
DSR
1
CTS
7
RTS
6
RTS
8
CTS
N/C
9
RI
1
CBLPROG0 can also be used to communicate with either a PC or an ICM5.
2
DB9 adapter not included, 1 foot long.
3
DB9 adapter not included, 10 feet long.
ETHERNET COMMUNICATIONS
Ethernet communications can be established at either 10 BASE-T or 100
BASE-TX. The G308 unit’s RJ45 jack is wired as a NIC (Network Interface
Card). For example, when wiring to a hub or switch use a straight-through
cable, but when connecting to another NIC use a crossover cable.
The Ethernet connector contains two LEDs. A yellow LED in the upper right,
and a bi-color green/amber LED in the upper left. The LEDs represent the
following statuses:
The Crimson manual contains additional information on Ethernet
communications.
LED COLOR
DESCRIPTION
YELLOW solid
Link established
YELLOW flashing Data being transferred
GREEN
10 BASE-T Communications
AMBER
100 BASE-TX Communications
