
RCS20 M:N Redundancy Switch Revision 15
Electrical Interfaces MN-RCS20 and CD-RCS20
5–16
Pin No. Signal Description Direction
Description Direction
9 ESCAUDRX 2A Rx Audio 2A Output Rx Clock 64K A Output
5.3.1.1.2.6 J9 | ES/ES (Earth Station-to-Earth Station)
The J9 | ES/ES Earth-Station-to-Earth-Station port is a 9-Pin Type D Female Asynchronous Data
Connector.
1 RXD_B (485) Receive Data B Output
2 RXD_A (232/485) Receive Data A Output
3 TXD_B (485) Transmit Data B Input
4 TXD_A (232/485) Transmit Data A Input
5 GND Signal Ground ---
6 DSR Data Set Ready Output
7 RTS Request to Send Input
8 CTS Clear to Send Output
9 NC No Connection
Table 5-9. J6 | ES/ES 9-Pin Type D Female Connector (For use with DMD20/DMD50)
1 RXD_B (485) Receive Data B Input
2 RXD_A (232/485) Receive Data A Input
3 TXD_B (485) Transmit Data B Output
4 TXD_A (232/485) Transmit Data A Output
5 GND Signal Ground ---
6 DSR No Connection ---
7 RTS No Connection ---
8 CTS No Connection ---
9 NC No Connection ---
5.3.1.1.2.7 J7 | ESC ALM (Engineering Service Circuits Alarm Interface)
The J7 | ESC ALM port is a 25-Pin Type D Female Connector.
1 Ground GND ---
2 Backward Alarm Out-1 NO ESCBWO 1 NO ---
3 No Connection N/C ---
4 Backward Alarm Out-2 NO ESCBWO 1 NO ---
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