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Comtrol Rocket Port Multiport Serial Cards 550 Manuel D’Utilisation

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17 
 
Rocket Port Interface Box DB25 Signals 
 
 
DB25 Pin 
RS232 Signal 
RS422 Signal 
(RocketPort 
RS232/422 
version only) 
Universal Interface 
2 
TxD 
*See note 
See UI manual 
3 
RxD 
*See note 
See UI manual 
4 
RTS 
*See note 
See UI manual 
5 
CTS 
*See note 
See UI manual 
6 
DSR 
*See note 
See UI manual 
7 
Signal Gnd 
*See note 
See UI manual 
8 
DCD 
*See note 
See UI manual 
20 
DTR 
*See note 
See UI manual 
15 
Not used  
RxD+  RxD(B) 
See UI manual 
17 
Not used  
RxD -  RxD(A) 
See UI manual 
19 
Not used  
TxD+  TxD(B) 
See UI manual 
25 
Not used  
TxD -  TxD(A) 
See UI manual 
 
*Note :  All RS232 signals are present in RS422 mode. 
 
The RocketPort interface box can only be used with the RocketPort 550-8 and 
RocketPort 550-16.  These controllers have a single DB25F mounted on the backplate 
which connects via the RocketPort cable to the interface box.  Alternatively the 
RocketPort 550-8 and 550-16 controllers may connect to the Comtrol Universal 
Interface (UI). Refer to the UI manual for connector pin-outs. 
 
The Quad, Octa, RJ11 and RJ45 RocketPort versions do not support RS422 mode. 
 
Pins 1, 9, 10, 11, 12, 13, 14, 21, 22, 23 and 24 of each 25 way connector are not used.