GE GFK-1541B - Manual (Page 18)

GFK-1541B Chapter 2 Installation 2-5
2
Ports on the CMM321
RS-232, RJ-11 Port (Station Manager Port)
The RS-232, 6-pin, RJ-11 “phone jack” port is used to connect a terminal or terminal emulator to
access the Station Manager software on the Ethernet Interface. A cable is needed to connect the
terminal or emulator to the Ethernet Interface (see Appendix B, “Communications Ports
Characteristics”). This port is also used to update the module’s firmware.
Ethernet Ports
The CMM321 has just one Ethernet interface. Connection to the Ethernet network can be made
either through the 10Base-T connector or the AAUI connector. You must connect to just one or
the other connector; you cannot use both at the same time. Note that module versions EF and
earlier do not have a 10Base T port, and can only be connected through their AAUI port.
10Base-T Port
This port is located on the front of the module and it can be directly connected to a 10Base-T
network (no external transceiver is needed). It uses a standard RJ-45 jack. See Appendix B for
port details.
AAUI (Transceiver) Port
This port uses a standard 14-pin AAUI connector to provide the electrical and mechanical
interface to a user-provided IEEE 802.3 transceiver. See Appendix B for Port details.
Caution
Do not connect or disconnect a transceiver cable at the AAUI port while
power is applied to the PLC. This may blow the AAUI port fuse and/or
cause permanent damage to the Ethernet Interface.
CMM321 Labels
Default Station Address Label
The Default Station Address label lists the MAC address to be used by this Interface.
Serial Number Label
The Serial Number Label indicates the serial number of this Interface.
Non-Replaceable AAUI Fuse
A non-replaceable fuse is provided on the DC power that is supplied by the Ethernet Interface to
the AAUI network port for use by an external transceiver. If this fuse blows, you must return the
Ethernet Interface to GE Fanuc for repair.