Comtech EF Data Radyne RCS20 Installation And Operation Manual page 120

RCS20 M:N Redundancy Switch
Electrical Interfaces
Pin No.
59 IDR ESC Transmit 8 Kbps Output Data B
60 IDR ESC Receive 8 Kbps Clock Output B
61 IDR ESC Receive 8 Kbps Data Output B
62 IDR ESC Backward Alarm Out 4 Normally Open
63
64 Synchronous Data
65 Synchronous Data
66
67 Synchronous Data Request to Send B
68 Synchronous Data Receiver Ready B
5.3.2.2 J9 | MODEM 9 | BACK UP 2 68-Pin High Density Min DSUB Connector
J9 | MODEM 9 | BACK UP 2 connects to Backup Modem 2 in a 2:N configuration, or to the prime modem
9 in a 1:9 configuration. See section 5.3.2.1for pinout table.
5.3.2.3 J10 | BACK UP 1 68-Pin High Density Min DSUB Connector
J10 | BACK UP 1 always connects to backup modem 1 since there is always at least one backup modem
in a redundancy system. See section 5.3.2.1for pinout table.
5.3.2.4 J31 | RCU-20 15-pin High-Density DSUB Connector
J31 | RCU-20 connects the DDS20 to the RCU20 providing power, ground, and serial control.
Signal Name
IBS Transmit Octet Input B
Data Mode Out B
Clear to Send B
IBS Receive Octet Output B
Pin No. Signal Name
1 Serial Control Clock
2 Relay +6 Volts
3 Serial Control Data 2
4 Ground
5 Ground
6 Logic +5 Volts
7 Relay +6 Volts
8 Relay +6 Volts
9 Ground
10 Ground
11 Relay +6 Volts
12 Serial Control Data 1
13 Ground
14 Serial Control Data 3
15 DDS20 Interrupt
Signal Direction
DDS_LCLK IN
VCC_RELAY IN
DDS_LDAT2 Bidirectional
GND ---
GND ---
VCC IN
VCC_RELAY IN
VCC_RELAY IN
GND ---
GND ---
VCC_RELAY IN
DDS_LDAT1 Bidirectional
GND ---
DDS_LDAT3 Bidirectional
INT OUT
5–22
MN-RCS20 and CD-RCS20
Signal Direction
ESCTXD-B Input
ESCRXC-B Output
ESCRXD-B Output
ESCBWO 4NO ---
TXO-B Input
SYNC DM-B Output
SYNC CS-B Input
RXO-B Output
SYNC RS-B Input
SYNC RR-B Output
Revision 15