Product Description:

The S20-DI-16/1 is a 16-channel digital input module produced by Bosch Rexroth Indramat within the S20 IndraControl Modules series. Installed on a system’s local bus, the unit translates field-level sensor signals into logic-level data that programmable controllers can process. By combining a compact housing with standard DIN rail mounting, this module helps machine builders gather discrete status points, such as signals from limit switches or proximity sensors, without occupying additional I/O rack space. Its design focuses on fast signal acquisition and reliable electrical isolation for industrial automation tasks.

The module supports a maximum load current of 8 A, accommodating connected sensing circuits without damaging its terminals. Galvanic separation is verified with an isolation test voltage of 500 V AC, preventing ground faults from propagating between the field side and the controller. The communication backplane supplies a stabilized local bus voltage of 5 V DC to power the internal logic and optocouplers. Signal changes propagate to the host in less than 5 µs, allowing rapid responses during fast motion sequences. Physical attachment is made on a 35 mm rail, aligning the housing with other S20 modules and simplifying the cabinet layout.

During handling and transport, the housing withstands a bump endurance of 10 g, and it tolerates operational shocks of up to 30 g without contact chatter. Continuous service on machinery with oscillatory loads is supported by a vibration resistance of 5 g. The overvoltage category II and protection class III ratings indicate that the module is suitable for extra-low-voltage circuits. Field wiring is connected through push-in terminals that require no tool for conductor insertion, reducing the number of steps needed to secure individual signal wires. The enclosure has an IP20 protection rating, making it suitable for installation inside a closed control cabinet where it is protected from water and small foreign objects.