− Component obsolescence, new parts are no longer available
− Cost to replace parts is high
− Decreasing ability to repair parts
− Electrical remote communication links are susceptible to
noise; lightning strikes
− Difficult to troubleshoot remote I/O problems
− Link is slow; takes time for I/O points to update
− Component obsolescence, new parts are no longer available
− Cost to replace parts is high
− Decreasing ability to repair parts
− Electrical remote communication links are susceptible to
noise; lightning strikes
− Difficult to troubleshoot remote I/O problems
− Link is slow; takes time for I/O points to update
− Controller configuration requires special “tuning” using
multiple segment control blocks
− Firmware compatibility issues between IMRIO02 and someI/O modules
− Must be careful when replacing parts in the systemBenefits
− Reliability; newer technology, improved fiber opticcommunications
− Availability of new replacement parts
− Easy to replace the existing remote I/O setup – same rack
form factor; uses existing fiber optic cables; the RIO22
replaces the RIO02 in the Remote cabinet
− Reduced cabinet footprint as the RIO02 in the Local cabinet
is no longer required; its functionality is now included in
a BRC300/400. The BRC replaces existing MFP or MFC
controllers in the Local cabinet
− Improved control performance - increased memory capacity,
faster execution and communication speeds
− Improved speed of communication link and remote I/Oupdates
− Improved hardware/firmware compatability between remote
I/O processor and remote I/O modules
− Easier firmware upgrades; IMRIO22 module has flashmemory
− Improved redundancy; faster detection/failover from primaryto backup IMRIO22
− Improved error-checking and diagnostics for troubleshooting
− Redundant HNET remote communication channels
Minimum System Requirements
− BRC300/400 controllers require Process Bus Adapters (PBA).
Please add these if they do not currently exist
− Composer Engineering Tools version 5.0 or later
− Fiber optic cable (62.5/125 micrometer multimode) for
remote link
Restrictions/Limitations
− Supports only fiber optic point-to-point communication links
− Electrical links (twin axial or coaxial cable) must be replaced
with fiber optic
− Serial or daisy chain multi-drop links are not supported;
multiple drops to remote cabinets (up to 6) now require a star
configuration from the Local cabinet
Remote I/O Module Upgrade Kit
− Part number INRIOK01 (for non-redundant configuration).
− Part number INRIOK02 (for redundant configuration).
Each kit includes the following components:
Component Quantities Part Number Description
INRIOK01 INRIOK02
1 2 IMRIO22 Harmony remote I/O module
1 2 PHCBRCPBA20000 Process bus adapter
4 4 NTRL04 HNET fiber optic repeater
termination unit
2 2 PMKHRMPBA1T004 Process bus adapter cable
for HNET
4 4 PHAMSCTER30000 HNET bus terminator
0 1 PMKHRMBRC3000A Bridge controller
redundancy cable
Note: Multi-drop remote I/O architectures will require inter-column connection cables for
daisy chaining additional termination units in a local cabinet.
Why ABB’s solution is bestP

System/Application Compatibility
The remote I/O functionality is compatible with all other existing
features of the Harmony BRC300/400 or later controllers. This
includes, but is not limited to, the following:
ABB Symphony Harmony/INFI 90 DCS
Remote I/O module upgrade kit
− Support for multiple remote I/O links
− Support mixed I/O types, e.g. IOR/S800, Harmony Rack I/O,
Harmony Block I/O
− Re-use of existing fiber optic remote link cables