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.

GFK-1541B

Chapter 2 Installation

2-5

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GE GFK-1541B manual Ports on the CMM321 RS-232, RJ-11 Port Station Manager Port, Ethernet Ports, 10Base-T Port