1786-RPFM Allen-Bradley ControlNet Modular Repeater Medium Distance Fiber Module

Description of 1786-RPFM

The 1786-RPFM is an Allen-Bradley ControlNet accessory. This module is a Panel Mount / DIN rail mountable device that functions as ControlNet Modular Repeater Medium Distance Fiber Module.

This module is used to for conversion of Cox cable to fiber optic medium with a maximum distance of 3000 meters or 9843 feet. The fiber link provides isolation between connected nodes and provides an increased immunity to noise and electrical disturbances. The fiber link of this module requires use of 62.5/125 micron cable, OM1 multi-mode Fiber optic cable.

The 1786-RPFM is used with the 1786-RPA ControlNet Repeater Adapter module. Up to Four (4) 1786-RPFM may be used with One 1786-RPA. Additionally, mixing repeater types is allowed when assembling a ControlNet network. The maximum allowable total power consumption without damaging the module repeater adapter and nearby modules is 1.6 A @ 5V DC.

The 1786-RPFM is ideally used to extend the total length of One (1) ControlNet segment when used with Point-to-Point or Trunk line topology. It may also be used when planning to build Star and Ring topologies, to establish network with multiple direction from a single point. Additionally, these fiber converter and repeater module may be used if the application crosses an industrial location with known high levels of electrical noises and hazardous areas. The maximum attenuation for a fiber cable must not be higher than 13.3 dB. Typically, cable attenuation for a wavelength of 1300 nm is less than 1.5 dB/km.

RSnetWorx may be used to configure ControlNet properties as well as to qualify if the system being assembled conforms to the ControlNet requirement.

This device has a current draw of 400 mA, an operating wavelength of 1300 nm, and a level of attenuation of 13.3 dB. Designed to solve medium distance applications, this unit requires less than 3000 meters per segment between the two ControlNet Fiber repeaters, however the maximum length of the section depends upon the quality of fiber, a number of connectors, and a number of splices. When it comes to the installation of this repeater series, a trained specialist is recommended for this purpose as its installation requires a proper verification test. Moreover, this Allen Bradley 1786-RPFM unit should be mounted within a suitable enclosure to maximize the module’s operation. In addition, make sure that the interior of this enclosure is accessible by a tool, such as a screwdriver, so that no harm is done by the live parts. This 1786-RPFM ControlNet unit is mainly used to create a star topology, ring topology, extend the length of the network, and for conversion of copper coaxial cable to fiber media. The Allen Bradley 1786-RPFM unit provides exceptional isolation between nodes and is also less susceptible to the noisy environment than other copper media. It is also used to power various repeater modules. They both come with a status indicator that is interpreted by the user to communicate the faulty conditions and to check if there are errors in the data or not.

Technical Specifications for 1786-rpfm

About 1786-rpfm

The Allen-Bradley 1786-RPFM module is a ControlNet repeater module. It is a fiber repeater module designed for medium distances and it is designed to be used when a medium distance fiber network is required between 2 ControlNet nodes. The maximum distance supported by the 1786-RPFM is 3000 meters. The total permitted attenuation through the fiber link, including the connectors, splices, and fiber cable, is 13.3 dB. Fiber media offers 2 benefits which are ground isolation between adjacent nodes and reduced noise susceptibility compared to copper media. Up to four 1786-RPFM modules can be attached to a 1786-RPA repeater adapter. Additionally, the total power consumed by four 1786-RPFM modules connected to a repeater adapter should not exceed 1.6 Amps at 5 Volts DC. The repeater adapter and modules could be damaged if the power limit is exceeded.

The dimensions of the 1786-RPFM repeater module are: 101.2 millimeters in height, 111 millimeters in width, and 69 millimeters in depth. The voltage and current ratings for the 1786-RPFM repeater module are a maximum of 400 milliamps at 5 Volts DC. The rated power dissipation level is 2 Watts and the rated power consumption level is also 2 Watts. The communication rate supported by the 1786-RPFM repeater module is 5 Mbps. The repeater can be mounted in any orientation. The enclosure used for the mounting of the 1786-RPFM repeater module should have minimum dimensions of 304.8 x 196.8 x 101.6 millimeters. The fiber cable compatible with the repeater module is 62.5/125 micron multimode fiber. The repeater has an open enclosure and it comes with the T5 ATEX temperature code. The temperature of the surrounding air should not be allowed to exceed 140 degrees Fahrenheit.