CTI Products MCN RCD System Overview - Manual (Page 19)

MCN System Manual System Operation
CTI Products, Inc.
68-10833-120
15
COM 2
COM 1
CA-80041-100
2
COMPARATORS
CIB
CIB
CIB
T
HIB
T
1
3
P/S
OUT
IN
IN
IN
IN
OUT
OUT
OUT
P/S
LOCAL PC
Figure 2 - System Operation Example
Bi-directional Lines on IIBs
Because the console VOTE and DISABLE lines are bi-directional, the console’s
LEDs will be lit if the console’s outputs are active. Because of this, the console
could still indicate a DISABLE or VOTE on a receiver even if there is a problem
in the network cabling or the Comparator I/O Module. Take for example the
system shown in Figure 3.
CA-80029-100
COMPARATOR
OUT
IN
T
IN
OUT
MODULE
MCN
1
COMPARATOR
16 I/O
CEB
RX1-4
RX5-8
IIB
P/S
A
16 I/O
B
T
I/O
Figure 3 - Parallel I/O Monitoring and Control Station
In this system, the VOTE and DISABLE control lines that connect to the 16 I/O
cards of the CEB are actually bi-directional signals. Figure 4 shows the interface
between the console electronics and the IIB’s J1 connector.