Description of 1786-RPFRL
The Allen-Bradley 1786-RPAB adapter is a ControlNet modular
repeater adapter. It works with an RG6 copper coax fiber type and
it is capable of connecting multiple modules. To be exact, the
1786-RPAB repeater adapter can connect up to 2 modules when it is
used with either the Allen-Bradley 1786-RPFRXL/B or the 1786-RPFRL
modules and with up to 4 modules that are the Allen-Bradley
1786-RPFS, 1786-RPCD, or the 1786-RPFM repeater modules. The
1786-RPAB repeater adapter requires 24 Volts DC input power and at
5 Volts DC, it can provide up to a maximum of 1.6 Amps of backplane
output current.
The 1786-RPAB repeater adapter serves different functions such as
for extending the network’s length, performing network media
conversions from coaxial or copper media to fiber media as well as
from fiber media to coaxial or copper media, providing power to the
repeater modules, and the creation of a ring, star, or
point-to-point network topology. Both the repeater adapters and
repeater modules are equipped with 2 status indicators, which
indicates if they are both powered up or if a fault has been
detected (also known as ready/fault), and if errors are present on
the data that is being received at the adapters and modules. The
entire 1786-RPAB repeater adapter has an approximate measurement of
4 x 4 x 3 inches, and it weighs around 7 ounces. This Series B
repeater adapter is also known as the 1786-RPA/B.
Technical specifications for 1786-RPFRL
| Manufacturer | Rockwell Automation |
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| Brand | Allen-Bradley |
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| Part Number/Catalog No. | 1786-RPFRL/B |
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| Product Line | ControlNet Repeater |
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| Repeater Type | Fiber Ring Repeater Module |
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| Fiber Type | 62.5/125 micron multi-mode fiber |
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| Fiber Operating Wavelength | 1300 nm |
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| Attenuation Levels | 15 dB |
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| Input Power | 5V DC |
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| Typical Repeater Distance | 0-10km |
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| Backplane Current Draw | 570 mA |
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The Allen-Bradley 1786-RPFRL module is a ControlNet fiber optic
ring repeater module. It supports fiber media redundancy through
the use of a ring topology which enables long transmission ranges,
protection against electromagnetic interference, and ground
isolation between the nodes. The distance between fiber repeaters
depends on a number of factors including the fiber quality, number
of splices, and number of connectors. For the 1786-RPFRL module,
the loss on the fiber links must be less than 15 dB. The total
length of the fiber ring is limited by the ControlNet standard to
20 kilometers or less. Plastic or ceramic ST fiber connectors
should be used with the module. Metal connectors are not supported.
The 1786-RPFRL module provides 2 fiber channels, status indicators
for activity on each fiber channel, and a relay contact connector
for system status and communication updates. The power input
requirements for the module are 570 milliamps at 5 Volts DC. The
power requirements of the backplane are 2.8 Watts (3.02 Watts
maximum). The supported communication rate is 5 Mbps. The module
can be mounted in any orientation. The maximum voltage for the
relay contactor is 30 Volts DC. The minimum and maximum currents
for the relay contactor are 1 milliamp and 900 milliamps,
respectively. The isolation voltage rating is 50 Volts continuous.
The wire size recommended for use with the 1786-RPFRL module is 22
to 14 AWG solid or stranded copper wire which is rated at 75
degrees Celsius or higher. The 1786-RPFRL module is an open module
and it complies with T5 North American temperature code. The
temperature of the air around the 1786-RPFRL module should never
exceed 60 degrees Celsius.
