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1.4.3
Communication Modules
The communication module is used for linking the safety control station with external devices
through the communication lines to convert the signals for data exchange.
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Types and External View of Communication Modules
The following types of communication modules are available:
•
ALR111: RS-232C communication module
•
ALR121: RS-422/RS-485 communication module
•
ALE111: Ethernet communication module
IMPORTANT
When using ALE111, use the style S1 module with unit revision U:2 or later. The unit revision
is indicated on the top of the module. However, the unit revision is not indicated if it is U:0.
ALR111
ALR121
STATUS ACT
DX
TM1
RCV 1 2
SND 1 2
LED display
LED display close-up
Figure 1.4.3-1 External View of Serial Communication Module
ALE111
STATUS ACT
DX
RCV 1
SND 1
LINK 1
LED display
LED display close-up
Figure 1.4.3-2 External View of Ethernet Communication Module
<1.4 Input/Output Modules >
1-18
IM 32Q06C10-31E
4th Edition : Jan.30,2015-00