IRT DDA-4320, Инструкция, Страница: 5 / 16

DDA-4320 & ZDA-4320RH Instruction Book Revision 7
www.irtelectronics.com Page 5 of 16 4320-DDA_ib_Rev7.doc
Functional Diagrams
SW1
SW2
SW3-1
SW3-2
SW3-3
SW3-4
SW3-5
SW3-6
SW3-7
O/P 5
(SK7)
O/P 2
(SK5)
O/P 1
(SK9)
OUTPUTS
SIGNAL
PROCESSING
SIGNAL FAIL
DETECTION
MAIN/STBY
LOGIC
INPUT
(ASI/SDI)
(STM-1)
(SK2)
POWER FAIL
ALARM O/P
RL 2
BLOCK DIAGRAM DDA-4320 SIGNAL PATH
O/P 6
(SK3)
Relay Bypass on loss of power
EQUALISER RECLOCKER
SIGNAL FAIL
ALARM O/P
RL 1
+V
dc
SNMP
NOTE: Front panel switches (SW1 & SW2) valid only when used
with ZDA-4320RH double width rear assembly.
Outputs 3 (SK8) & 4 (SK4) not fitted.
CHANGE ALLOW / INHIBIT
CHANGE REQUEST
SET RECLOCKER RATE
(SW3-1, SW3-2 & SW3-3)
EQUALISER REDUCTION
ENABLE OUTPUT AIS
ENABLE SWITCHING ON AIS
DISABLE SNMP ALARMS
Handshake diagram 2 x DDA-4320’s
O/P 6
(SK8)
INPUT A
(SK6)
RL5B RL5A
OUTPUTS
*
RL1B RL1A
RL2A
INPUT B
(SK5)
O/P 2
(SK3)
RL4A
O/P 1
(SK11)
RL4B
O/P 5A
(SK9)
DDA SIGNAL
PROCESSING
O/P 5B
(SK1)
DDA SIGNAL
PROCESSING
NOTE: * Outputs 3 (SK10) & 4 (SK2) not fitted.
† On loss of power to both cards, only one input (A or B) can be switched to O/P 6 (SK8),
dependent upon which card was acting as the active feed as determined by the position
of relay RL2A.
Relay Bypass
†
on loss of power
Relay Bypass
†
on loss of power