Serial Link Interface - ABB Symphony Harmony Series Instruction

Redundancy Link
Station Link
WBPEEUI240751C0
DATA AN D
C O N T RO L
D UAR T
DATA AN D
C O N T RO L
D UAR T
Figure 3-10. Serial Link Interface
also performs serial to parallel data conversion on data
received serially from the interface circuits.
The redundancy link allows redundant I/O modules to com-
municate. The backplane on the base makes the redundancy
link hardware connection between redundant I/O modules.
The link operates at a one-megabaud rate and is itself redun-
dant. Redundant I/O modules exchange the following informa-
tion:
I/O channel configuration.
•
Status and availability of all I/O channels.
•
Electronic ID.
•
Device label.
•
The station link interfaces the RS-485 serial link to communi-
cate with an analog control station (IISAC01). This interface
acts as a communications gateway between the Harmony con-
troller and the station. The station link operates at a 40-kilo-
baud rate and supports up to eight analog control stations.
The base makes the station link hardware connection between
the I/O module and stations.
NOTE: Only the CIO-100 block supports the station link.
A
R E D U N DAN C Y
R E D U N DAN C Y
LIN K
B
LIN K
IN T ER FAC E
O R
STAT IO N LIN K
STAT IO N LIN K
IN T ER FAC E
(C I0-100 O N LY)
I/O Block
T 00 5 62 A
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