The Siemens 6ES7288-2DR08-0AA0 is a SIMATIC S7-200 SMART SM DR08 digital output module providing 8 relay outputs, each rated for 2 A continuous current on both resistive and inductive loads. That 2 A per channel is the thermal continuous current limit — the figure that governs real-world wiring, not a surge rating. Each relay switches in under 10 ms on both make and break, which keeps cycle times predictable in a pick-and-place or indexing cell where the output handshake is part of the sequence budget. The relay coil is rated for 24 V DC nominal, with a permissible supply range of 20.4 V to 28.8 V DC. Total coil current for all eight relays is 80 mA typical, plus 90 mA drawn from the 5 V DC backplane bus. That backplane draw matters when calculating the CPU module's power budget — the S7-200 SMART CPU supplies the 5 V rail, and exceeding its capacity locks up the expansion bus. Isolation between channels is via dry-contact relay separation, tested at 1 500 V AC for one minute. That means each output is electrically independent — no shared commons to track when wiring a mixed-voltage panel. The module carries CE marking and is rated IP20, so it belongs inside a cabinet, not exposed to washdown.
Unshielded cable runs to field devices can reach 150 m; shielded runs extend to 500 m. That covers most machine-mounted sensor and actuator distances without a remote I/O drop. The module has reverse-polarity protection on the 24 V DC supply input.