Comtech EF Data SNM-1002 User Manual
Page 119
SNM-1002 LinkSync
Modem
Revision 2
Maintenance
MN/SNM1002.OM
5–11
Table 5-2. SNM-1002 Fault Tree (Continued)
COMMON EQUIP FAULTS
TX IF OUTPUT OFF
TX
FA
U
LT LED
TX
FA
U
LT RELA
Y
RX
FA
U
LT LED
RX
FA
U
LT RELA
Y
CO
M EQ
FA
U
LT LED
CO
M EQ
FA
U
LT RELA
Y
TX
A
L
A
RM LED
T
X
AL
ARM RE
L
AY #2
RX ALARM LED
RX AL
ARM RE
L
AY #3
SPARE
AL
ARM RE
L
AY #1
PRIMARY AL
ARM RE
L
AY
SE
CONDARY AL
ARM RE
L
AY
DEFERRED MAIN ALARM
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
BATTERY/CLOCK
X
-12V
POWER
SUPPLY
X
X
+12V
POWER
SUPPLY
X
X
+5V
SUPPLY
X
X
SELF
TEST
X
CONTROLLER
X
X
INTERFACE
MODULE
X
X
Legend
Test Note
Fault/Alarm Relay
Test Points Connector/Pins
1
TX FAULT
Pin 4 (NO), 5 (COM), 6 (NC) *
2
RX FAULT
Pin 7 (NO), 8 (COM), 9 (NC) *
3
COM EQ FAULT
Pin 1 (NO), 2 (COM), 3 (NC) *
4
TX ALARM #2
Pin 4 (NO), 5 (COM), 6 (NC) *
5
RX ALARM #3
Pin 7 (NO), 8 (COM), 9 (NC) *
6
PRIMARY ALARM
Pin 43 (NO), 10 (COM), 27 (NC) *
7
SECONDARY ALARM
Pin 44 (NO), 11 (COM), 28 (NC) *
8
DEF MAINT ALARM
Pin 17 **
*
A connection between the common and N.O. contacts indicate no fault/alarm.
**
Signal is open collector high impedance if faulted.