S20-ETH-BK Bosch Rexroth Indramat
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MPN: R911173905
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The Bosch Rexroth Indramat S20-ETH-BK is part of the S20 IndraControl Modules series and features a Modbus/TCP Ethernet fieldbus. It uses a push-in connection method and mounts to a 35 mm DIN rail with an IP20 protection rating. The module operates at a supply voltage of 24 V DC and has a maximum contact load of 8 Amps.
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Product Description:
The S20-ETH-BK is a bus coupler manufactured by Bosch Rexroth Indramat for the S20 IndraControl Modules series. It serves as the network head of an S20 I/O station, translating Ethernet-based control traffic into the local bus signals that reach every downstream slice. By forming this gateway, the unit allows distributed sensors and actuators to be addressed over standard plant wiring while retaining modular expansion on the machine rail. The coupler occupies limited cabinet space and establishes the power, data, and mechanical alignment required for subsequent modules.
The electronics are powered by a 24 V DC PELV source, and the input may vary within a ±5% ripple band without affecting operation. Communication with the controller is handled through Ethernet (Modbus/TCP). Once inside the station, frames are forwarded across the local bus at 100 Mbps to maintain deterministic update times. A separate bus base module acts as the physical interface, isolating the field wiring from the coupler connection. Push-in connectors simplify field installation, and the NE housing style provides guided slots that match the S20 form factor. For dielectric safety, the coupler withstands a test potential of 500 V AC for one minute at 50 Hz between the logic and field circuits.
Mechanical integration follows the 35 mm DIN rail profile established by EN 60715, allowing the module to clip into standard control panels. The internal power distribution path is rated for a continuous 8 A load, supporting sizable downstream I/O groups without external feeders. Ingress protection is limited to IP20, so the device is intended for closed enclosures with filtered airflow. Its compact geometry supports efficient cabinet layout. The module has a width of 45 mm, a height of 126.1 mm, and a depth of 74 mm. These dimensions leave room for adjacent slices while keeping the signal path short and minimizing impedance on the high-speed backplane.
