Universal Remote I/O (RIO) Network
The strength and versatility of the Universal Remote I/O network comes from the breadth of products it supports.
In addition to 1746 I/O, the Universal Remote I/O network supports many Allen-Bradley and third-party devices.
Typical applications range from simple I/O links with controllers and I/O, to links with a wide variety of other types of devices.
You connect devices through remote I/O adapter modules or built-in remote I/O adapters.
Using the Universal RIO Network instead of direct-wiring a device over a long distance to a local I/O chassis reduces installation,
tart-up, and maintenance costs by placing the I/O closer to the sensors and actuators.
SLC 5/03, 5/04, and 5/05 processors support pass-thru which lets you configure RIO devices remotely from an Ethernet,
DH+, or DH-485/DF1 network, as well as block transfer instructions for faster reading and writing of I/O data.

The 1747-BSN features:
• backup of one Remote I/O or DH+ network per complementary BSN module pair.
• backup of one RS-232/DH-485 communications per complentary BSN module pair,
• allowing HMIs on channel 0 to automatically transfer to the primary processor.
• transfer of up to 2 K words of retentive data per BSN.
• repair of primary system fault during secondary backup system operation.
• remote programming capability of secondary processor on DH+ (SLC 5/04 only).
• minimal user program impact.
• backup system diagnostic information.
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