Siemens 6ES7522-5HH00-0AB0 SIMATIC S7-1500 DQ 16x230VAC/2A ST Relay Digital Output PLC I/O Module

The Siemens 6ES7522-5HH00-0AB0 is a SIMATIC S7-1500 digital output module, DQ 16x230VAC/2A ST (relay), packing 16 relay outputs in groups of 2 channels rated 2 A each. It supports safety-related shutdown of load groups up to SIL1 per EN IEC 62061 and Category 2/PL c per EN ISO 13849-1, and it needs a front connector ordered separately.

Technical Specifications

Selection Notes

ST places this relay module in the Standard performance class with channel diagnostics and SIL1/Cat.2/PL c safety-related tripping from FS02 onward, matching the smaller-channel-count DQ 8x230VAC/5A ST relay module in switching technology but doubling the channel count at a lower 2 A per-channel rating. That tradeoff makes this module the better fit when a machine needs many independent AC/DC relay outputs at moderate current, such as valve banks or indicator groups, while the 8-channel/5 A sibling suits fewer, higher-current loads like motor contactor coils. Both accept the same 24-230 V AC/24-120 V DC mixed voltage range per channel, so the choice comes down to channel count versus per-channel current.

Applications

Switching multiple mixed AC/DC loads such as valve banks, pilot lights, and small contactor coils up to 2 A per channel, including safety-related shutdown paths rated SIL1/PL c.