User manual

105Publication LOGIX-AP010B-EN-P - May 2010 105
Chapter 6
Communication and Networking
S5 Serial Communication
See these sections for information on communication and networks.
S5 Serial Communication Processors
(CP 521, CP 523, CP 524, and CP 525)
These S5 communication modules can be used for point-to-point serial data
communication with a peripheral device by using a current loop or RS-232
interface. They are often used to send messages to a serial printer. The CP 524
and CP 525 can be configured to communicate with another controller in
another rack.
Serial Communication Memory Submodule
The communication processors have receptacles for memory submodules that
provide the extra memory capacity required for parameter assignment data and
message texts. The configured data is transferred from the memory
submodule to the communication processors on startup. These memory
modules have a maximum capacity of 16 KB.
Serial Interface
The S5 communication processors connect to a peripheral device over a serial
interface that can be a TTY current loop interface or an RS-232C (V.24)
interface. The TTY 20mA current loop interface is no longer used in modern
peripheral devices.
The signals of both interfaces are transmitted over a common subminiature D
socket connector.