Comtech EF Data RCS11 - Manual (Page 61)

RCS11 1:1 Redundancy Switch Connector Pinouts
MN-RCS11 – Revision 9 5–3
7 RX (B) + RS485 Input
8 TX (A) – RS485 Output
9 TX (B) + RS485 Output
*
Note: Connect to Ground on power up to enable RS485 Mode
5.4.3 TX B (J3)
The TX B is the TX IF input from the modulator. If the RCS11 is configured for a 70 or 140 MHz
application, then this connector is either a 75 Ohm or 50 Ohm BNC connector. If the switch is
configured for L-Band, then this connector is a 50 Ohm SMA female connector.
5.4.4 TX OUT (J4)
The TX OUT is the TX IF Output from the switch. If the RCS11 is configured for a 70 or 140 MHz
application, then this connector is either a 75 Ohm or 50 Ohm BNC connector. If the switch is
configured for L-Band, then this connector is a 50 Ohm SMA female connector.
5.4.5 TX A (J5)
The TX A is the TX IF input from the modulator. If the RCS11 is configured for a 70 or 140 MHz
application, then this connector is either a 75 Ohm or 50 Ohm BNC connector. If the switch is
configured for L-Band, then this connector is a 50 Ohm SMA female connector.
5.4.6 GND
The Chassis Ground connection is located on the rear panel next to the AC input power entry
module. The Chassis ground connection is a #10-32 threaded stud.
5.5 UNIVERSAL G.703/SYNCHROUNOUS INTERFACE
The RCS11 Unversal G703/Synchrounous Interface supports G703 (Balanced & Unbalanced)
and synchrounous data for the DMD15, DMD20 and the DMD50 products.
5.5.1 SYNC DATA (J7)
The Sync Data Port is a 37-Pin RS449 Female ‘D’ Connector. This port is the user interface for
Synchronous RS-422 / RS-485 / RS-232 / V.35 Data. Refer to Table 5-4 for pinouts.
Table 5-4. J8 SYNC DATA
Pin Number Discription Signal
1,19,20,37 Ground GND
2,10,12,14,18,28,30,32,34,36 Not Used NA
3 Transmit Octet (A) - Input
4 Send Data (A) - Input
5 Send Timing (A) - Output