ABB AC 800M

Section 3 Configuration Communication Possibilities
3BSE 027 941 R301 93
The network can utilize different and mixed link implementations such as Fast
Ethernet and PPP. It provides for full redundancy to achieve high network
availability.
The AC 800M controller is always connected to the Control Network via an STP
(Shielded Twisted Pair) cable. Should the local environment be of an industrial
nature, the AC 800M / Control network connection must be converted over to a
Fiber Optic (FO) cable. This is achieved by installing a Switch/Hub having both
optical and electrical ports. See Figure 27 on page 92.
For more information on the Control Network, see Related Documentation on
page 17.
Communication Possibilities
Located on the processor unit (PM8xx/TP830), the following communication ports
are available for the following functions:
• CN1 and CN2 are used for connection to the Control Network. Both are RJ45
ports for Ethernet (IEEE802.3) and connection is normally achieved using
category 5 shielded twisted pair cable (STP class 5). However, as mentioned
previously, within industrial environments it is recommended that all STP
cables are converted to optical fiber.
– For single or redundant CPUs and single networks: All CN1 are connected
to the network (CN2 can be used but requires reconfiguration of the
communication set-up for the concerned CPU).
– For single or redundant CPUs and redundant networks: All CN1 are
connected to the primary network and all CN2 to the secondary network.
Details on cable selection, hubs, switches and so forth, are provided in this
book (see Appendix C, Recommended Components).
• COM3 is an RJ45 port for RS232-C with modem signals. Examples of
protocols are Modbus, Siemens 3964R, COMLI or custom-design. For more
details, see Related Documentation on page 17.
• COM4 is an RJ45 port for connection of service tools (see Connecting Control
Builder M on page 91). The port has no modem signals.