Westermo MD-54 - Manual (Page 10)

21 6605-2001
MD-54 as ’CTS-generator’
When a channel has data to send it indicates this by activating CTS. Data may
not be sent until an active RTS, or a set time has elapsed since CTS was first activated.
The MD-54 will buffer the incoming data until these condition are fulfilled.
Both RS-232/V.24 interfaces are DCE.
XON/XOFF
CTS always
active Status signalling. CTS
active when channel 3
can receive data.
Data transmission
possible without condi-
tions or if RTS is acti-
vated (selectable)
MD-54
(XON/XOFF to CTS)
3 3
2 2
7 7
8 8
TD
RD
RTS
CTS
TD
RD
RTS
CTS
Channel 0 Channel 3
MD-54
(CTS-generator)
3 3
2 2
7 7
8 8
TD
RD
RTS
CTS
TD
RD
RTS
CTS
Channel 0 Channel 3
MD-54 as ’XON/XOFF to CTS-converter’
The MD-54 is used in this mode if a system that controls its data flow with XON/XOFF
is required to communicate with another system which controls data flow by means of
CTS. The data flow on channel 0 is controlled using XON/XOFF. Channel 3 indicates to
its connected unit that its buffer is full by deactivating CTS. Both RS-232/V.24 interfaces
are DCE.