R-IL PB BK Bosch Rexroth Indramat
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MPN: 289283
The Bosch Rexroth Indramat R-IL PB BK is part of the R-IL PROFIBUS Bus Couplers series and supports a maximum of 63 devices per station. It features a logic supply voltage of 7.5 V DC at 2 A and a main supply voltage of 24 V DC. The device uses a 9-pin D-SUB female PROFIBUS connector and has an IP20 degree of protection with housing dimensions of 90 by 120 by 72 millimeters.
Internal Product Review
The R-IL PB BK is a PROFIBUS bus coupler with an RS-485 interface and capacity for up to 63 devices per station. Spring-cage terminal blocks support clean installation, and IP20 protection aligns well with enclosed control cabinet use. A highly practical option for stable bus communication in modular automation systems.
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Product Description:
The R-IL PB BK is a PROFIBUS bus coupler produced by Bosch Rexroth Indramat for the R-IL PROFIBUS Bus Couplers series. It links inline I/O terminals to a master through PROFIBUS-DP so that discrete and analog signals can be transmitted to higher-level controllers in factory automation systems. Serving as the gateway between field wiring and network traffic, the unit distributes supply voltages to downstream modules and passes process data to PLCs without requiring additional interface converters.
The coupler uses an analog supply of 24 V DC and draws up to 0.5 A, providing sensor power on the inline backplane, while a 7.5 V logic rail from the main feed supports its internal electronics. The main and segment circuits are both rated for 24 V DC, and wiring is connected through spring-cage terminal blocks that allow quick conductor insertion without ferrules. Field devices connect to the network through an RS-485 transceiver that is accessible through a 9-position D-SUB female connector. Up to 63 inline devices can be addressed behind this coupler, while station identification and diagnostic telegrams are handled automatically. An 8 A potential jumper bridges power between terminals so that actuator groups can share a common supply without external links.
The molded housing measures 90 × 120 × 72 mm and has an IP20 protection rating, making it suitable for installation inside a control cabinet. The logic circuitry may draw up to 2 A, and cyclic data exchange with the master can occupy as much as 184 bytes of PROFIBUS process space per station. The permitted supply cable length is up to 30 m, and the installation must remain within the operating limits for Class III equipment. The housing dimensions support cabinet spacing calculations, while the current limits help determine available power for connected inline modules.
