CRS-170 1:1 Redundancy Switch
Revision 1
Installation and Operations Manual
MN/CRS170.IOM
21
2.3
C
ABLING
W
ITH
CDM-600L
AND
CRS-150
Figure 2 shows how to connect a pair of CDM-600L Modems together with the
CRS-150 and CRS-170 switches.
Figure 2. Connection Diagram, CDM-600L and CRS-150
The following table lists cable assemblies that may be supplied with the CRS-170 when
used with the CDM-600L and CRS-150. Other cables between the CRS-150 and the
CDM-600L modems are supplied with the CRS-150.
Quantity Part #
Description
2
CA/WR10456-4 Data/Control Y Cable, DB25 Male to Male 4 ft, DB9 Male 1 ft
4
CA/6357-2
IF Coax Cable, 50
Ω
, length = 2 feet
IMPORTANT
When connecting the Control cable between the CRS-170 and the modems,
ensure that screw locks on the ‘D’ type connectors are securely fastened.
This will prevent the accidental un-mating of the cable, particularly when a
standby unit is being removed or replaced.
SDM -300L3
CDM-600L
SDM -300L3
CDM-600L
CRS -170
CRS
-
170
Tx
(Note 1)
Rx
(Note 2)
Tx
(Note 1)
Rx
(Note 2)
Notes:
1.
Carries Tx L - Band, BUC DC, 10 MHz and FSK
2.
Carries Rx L - Band, LNB DC, 10 MHz
Tx
L
-
Band
BUC DC
10 MHz
FSK
Rx
L
-
Band
LNB DC
10 MHz
User
Data
Interface
170 Control & Power
SMS
-
301
CRS-150
Data
Data
DATA A
DATA B
J5
Tx A
J6
Tx B
J1
Rx A
J2
Rx B
J8
J7
J3 (Top)
Modem A
Modem B
J2
J1
J2
J1
P3B
P3B
J4 (Bottom)
