Comtech EF Data CRS-120 - Manual (Page 17)

1:1 Redundancy Switch Revision 3
Introduction MN/CRS120.IOM
1–3
Figure 1-2. Block Diagram
Modulator
A
Modulator
A
Alarm
Modulator
B
Modulator
B
Alarm
Alarm Cable
Tx-B
Tx-A
Data
J4 Tx Online
IF
Coupler
IF
Coupler
J3 Tx Mon -20 dB
RS485
Online Status
Contacts
IF
Switch
CRS-120 or CRS-120L
Ethernet
Ethernet
Data
15
P
in
D-F
J5 Tx Standby
Coil
Coil
15
P
in
D-F
Alarm Cable
+12 VDC
A
B
D
C
Tx A
Tx B
B Online LED
A Online LED
9 Pin D-F
15 Pin D-M
15 Pin D-M
P2
P2
J1
J1
J6A
J6B
J1A
(Top)
J1B
(Bottom)
J2
DIP Switch
Standby
Tx IF Out
B
A