Siemens 6ES7523-1BL00-0AA0 SIMATIC S7-1500 DI16x24VDC/DQ16x24VDC/0.5A BA PLC I/O Module

The Siemens 6ES7523-1BL00-0AA0 is a SIMATIC S7-1500 digital combo module with 16 DI 24VDC and 16 DQ 24VDC/0.5A transistor outputs in groups of 8. Rated for 24 V DC supply (19.2-28.8 V) with reverse-polarity protection, it supports safety-related load-group shutdown up to SIL2 / PL d Cat.3 and ships with 40-pole push-in front connectors.

Technical Specifications

Selection Notes

Combining DI and DQ on one 25 mm module saves backplane slots versus running separate input and output modules where S7-1500 rack space is the constraint. The 0.5 A per-channel output rating (4 A per group of 8, 8 A per module) covers small solenoid valves and indicator loads directly; higher loads need an external relay or contactor stage. The SIL 2 / PL d Cat. 3 safety-related shutdown capability, available from hardware version FS03/FS04, only matters if the load group ties into a safety function - for standard machine I/O without a safety requirement it is unused headroom.

Applications

Mixed digital signal panels on SIMATIC S7-1500 controllers: limit switch and pushbutton inputs paired with small actuator or lamp outputs on the same module, including safety-related load groups such as guard-interlocked drives where a separate safety relay isn't otherwise justified.