EPI1809-0021 Beckhoff
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The Beckhoff EPI1809-0021 is a digital input module from the EP Digital Input Modules series with 16 inputs and a nominal input voltage of 24 V DC. It features IO-Link communication with a data rate of 230.4 kbaud and supports an input connector of 16 x M8 socket. The unit has a protection rating of IP65, IP66, and IP67, and its housing is made of polyamide (PA6).
Internal Product Review
The Beckhoff EPI1809-0021 is a well-executed EP digital input module with 16 inputs and IO-Link communication. Support for EN 61131-2 Type 3 inputs and a 24 V DC nominal input voltage gives the module clean signal handling in standard industrial control circuits. IP65/IP66/IP67 protection and a variable installation position make the unit especially appealing for distributed machine I/O.
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Product Description:
The EPI1809-0021 digital input module is manufactured by Beckhoff as part of the EP Digital Input Modules series. Serving as an IO-Link endpoint, the block gathers discrete sensor states from the field and transfers them to a higher-level controller in industrial automation cells. Its sixteen channels accommodate proximity switches, pushbuttons, or encoder reference points, allowing compact signal acquisition directly on machines where cabinet space is limited.
This module communicates over IO-Link at a maximum line speed of 230.4 kbaud, a rate that permits timely state changes to reach the PLC without bottlenecks. Each input is debounced by a default filter of 3 ms; the filter can be disabled because the default pulse extension is 0 ms, giving flexibility for fast counting applications. The electronics accept a nominal control voltage of 24 V DC; losing that supply will turn all channels off simultaneously. All sixteen entrances conform to EN 61131-2 Type 3, and the block’s input capacity of 16 points is presented through individual status LEDs to aid commissioning.
Environmental resilience is defined by the sealing level of IP65/IP66/IP67, so the PA6 housing withstands dust and high-pressure water on production lines. A shared sensor supply of 0.5 A is provided through the 16 × M8 sockets, and the upstream interface uses a 1 × M12, 5-pin, A-coded plug that satisfies the IO-Link Class A profile. The module supports specification V1.1 devices, and the same release is required on the master side; therefore the firmware recognizes handshake sequences labeled V1.1 without additional configuration. Mechanical integration is simplified by variable mounting orientation and compact overall dimensions of 60 × 126 × 26.5 mm, enabling installation on moving carriages or tight frame profiles without infringing sensor clearances.
