The Siemens 6ES7522-1BH10-0AA0 is a SIMATIC S7-1500 digital output module with the product type designation DQ 16x24VDC/0.5A BA. It provides 16 transistor outputs (current-sourcing) arranged in groups of 8, with current limits defined per channel, per group, and for the whole module. This model is widely used wherever you need clean, deterministic switching of 24 V DC actuators while keeping wiring compact and cabinet density high.
A key point for real-world design: this module is intended for standard automation switching, but Siemens also states that it supports safety-oriented shutdown of load groups up to SIL 2 (EN IEC 62061:2021) and Category 3 / PL d (EN ISO 13849-1:2015) as part of an overall safety concept. It is not described as a dedicated fail-safe (F) output module by itself; rather, it can be applied in architectures that implement safe removal of power to output load groups under the correct conditions and documentation requirements.
What you get and where it fits
The module is supplied including a 40-pin push-in front connector, which simplifies field wiring and reduces assembly time compared with screw terminals. It is engineered for use in the SIMATIC ecosystem and can be integrated in engineering tools starting from STEP 7 TIA Portal V13.The Siemens manual collection for S7-1500/ET 200MP also lists this module under device-specific information for digital output modules, which is useful if you manage both central and distributed installations with consistent hardware.
Core Technical Specifications (from Siemens technical data)
| Item | Specification |
|---|---|
| Order number | 6ES7522-1BH10-0AA0 |
| Product type designation | DQ 16x24VDC/0.5A BA |
| Output technology | Transistor, current-sourcing (high-side switching) |
| Number of digital outputs | 16 |
| Channel grouping | 16 channels in groups of 8; current limits defined per group |
| Rated supply voltage | 24 V DC |
| Permissible supply range | 19.2 V to 28.8 V DC |
| Max current per channel | 0.5 A |
| Max current per group | 4 A |
| Max current per module | 8 A |
| Short-circuit protection | Yes; response threshold typ. 1 A |
| Output delays (resistive load) | 0→1 max 100 μs; 1→0 max 500 μs |
| Switching frequency limits | Resistive max 100 Hz; lamp max 10 Hz; inductive max 0.5 Hz (DC-13) |
| Cable length (max) | Shielded 1000 m; unshielded 600 m |
| Power consumption / power loss | Backplane bus 1.15 W; power loss typ. 2.2 W |
| Dimensions (W×H×D) | 25 mm × 147 mm × 129 mm |
| Weight | 312 g |
| Delivery contents | Includes 40-pin push-in front connector |
Practical performance: what these numbers mean on a machine
Fast switching for clean sequencing
With output delays on the order of 100 μs (turn-on) and 500 μs (turn-off) for resistive loads, the module supports crisp timing for typical discrete automation tasks: interlocks, valve actuation sequences, indexing steps, and coordinated station logic. This matters most when you want repeatable cycle behavior across multiple machines, not “it usually works unless it’s humid.”
Defined load limits that match cabinet reality
The module’s limits are not just “per channel.” Siemens also defines per-group (4 A) and per-module (8 A) totals. That’s the difference between a design that survives commissioning and a design that mysteriously browns out when everything turns on at once. Grouping channels into blocks of 8 encourages sensible load distribution (for example, splitting valve manifolds or lamp clusters across groups).
Protection features designed for industrial wiring mistakes
Short circuits and inductive kickback are part of life. Siemens specifies short-circuit protection and notes limitation of inductive shutdown voltage to L+ (−53 V). In plain terms: the output stage is engineered to tolerate the electrical ugliness that coils and long cables can produce, within the stated limits.
Safety-oriented shutdown support (without pretending it is a “safety output module”)
Siemens states that the module supports safety-oriented shutdown of load groups up to SIL 2 and PL d / Cat. 3 in accordance with the referenced standards. At the same time, the datasheet indicates “Suitable for safety functions: No,” while highlighting applicability for safety-related tripping of standard modules (with conditions depending on hardware functional status).
What this means in practice: you can design a system where the power feeding an output group is removed safely (for example through an appropriate safety switching element and validated wiring concept), and this module is compatible with that approach when implemented according to Siemens documentation and the relevant safety standards. It’s an engineering claim about system behavior, not a license to treat every output point as a certified safety output without the rest of the architecture.
Selection and application guide
| Application scenario | Why this module is a good fit | Design notes |
|---|---|---|
| Solenoid valves and pneumatic manifolds (24 V DC) | 0.5 A per channel suits many valve coils; fast switching supports sequencing | Respect group and module current totals (4 A per group, 8 A module) |
| Pilot relays, interposing relays, contactor coils | Current-sourcing transistor outputs are common for 24 V control circuits | Inductive loads have low max switching frequency (0.5 Hz DC-13) |
| Indicator lamps and stack lights | Lamp load rating listed (max 5 W) | For lamp loads, max switching frequency is 10 Hz |
| Long cable runs to field devices | Max cable lengths provided for shielded/unshielded | Use shielding and proper grounding practices where EMC is challenging |
Engineering, commissioning, and lifecycle
The module includes I&M data (I&M0 to I&M3), supporting lifecycle practices like asset identification and maintenance traceability in larger plants. It is also configurable in Siemens engineering environments beginning with TIA Portal V13, which is useful when supporting mixed-generation projects.
Environmental and mechanical constraints are straightforward: a slim 25 mm width supports dense cabinets; Siemens lists typical power loss and backplane consumption to help with thermal planning. Siemens also specifies operating altitude limits and temperature ranges (depending on installation orientation and functional status), which becomes important in high-density cabinets or high-altitude sites.
Siemens 6ES7522-1BH10-0AA0 is a SIMATIC S7-1500 digital output module (DQ 16x24VDC/0.5A BA) delivering 16 current-sourcing transistor outputs for 24 V DC actuators and indicators, with defined electrical protections, fast switching behavior, and clear current limits per channel, group, and module. It is a strong choice for standard discrete automation where reliability, cabinet density, and predictable switching matter, and it can be used in system designs that implement safety-oriented shutdown of load groups up to SIL 2 / PL d when engineered correctly.
