I/O Block
WBPEEUI240751C0 3 - 13
also performs serial to parallel data conversion on data
received serially from the interface circuits.
Redundancy Link
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.
Station Link
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.
Figure 3-10. Serial Link Interface
OR
DUART
STATION LINK
INT ER FAC E
STATION LINK
(C I0-1 00 O N LY)
T00562A
DUART
A
REDUNDANCY
LINK
INT ER FAC E
B
REDUNDANCY
LINK
DATA AN D
CONTROL
DATA AN D
CONTROL
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