Industrial Safety Control Solution – BOCHMANN SDO204 | Safety Digital Output Series
Where This Product Is Used
The BOCHMANN SDO204 is a 4-channel safety digital output module engineered for safety-critical industrial environments where reliable actuator control and functional safety compliance are non-negotiable. Typical deployment scenarios include:
- Emergency Stop (E-Stop) Systems – Drives safety relays and contactors in machine emergency stop circuits, ensuring SIL2/PLd-rated shutdown response.
- Robotic Cell Safety Gates – Controls door-lock actuators and light-curtain bypass relays in collaborative and industrial robot workcells.
- Hydraulic Press & Stamping Lines – Manages safe-torque-off (STO) signals and brake release outputs on servo-driven press machinery.
- Conveyor & Material Handling – Interfaces with safety-rated motor starters and frequency inverters for controlled stop functions (SS1/SS2).
- Packaging & Palletizing Equipment – Provides redundant output channels for guarding interlocks and pneumatic valve control in high-cycle applications.
- Process Plant Safety Instrumented Systems (SIS) – Acts as a final control element driver within IEC 61511-compliant SIS architectures.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | SDO204 |
| Brand | BOCHMANN |
| Module Type | Safety Digital Output (DO) |
| Output Channels | 4 × Safety DO |
| Safety Integrity Level | SIL 2 (IEC 62061) |
| Performance Level | PLd (ISO 13849-1) |
| Output Signal Type | Solid-state / Relay (application-dependent) |
| Rated Supply Voltage | 24 V DC |
| Communication Interface | BOCHMANN Safety Backplane Bus |
| Diagnostic Coverage | High DC (≥ 90%) |
| Housing / Form Factor | DIN-rail mount, compact module |
| Operating Temperature | 0 °C to +55 °C |
| Protection Class | IP20 |
| Weight | 1,740 g (module + packaging) |
| Country of Origin | Germany / EU |
Specifications are subject to revision. Always verify against the official BOCHMANN SDO204 datasheet before system design.
Why Engineers Specify This Model
- Dual-channel redundant outputs eliminate single-point-of-failure risk in safety-rated actuator circuits.
- Integrated diagnostics detect short-circuits, cross-faults, and open-load conditions without external test equipment.
- Seamless integration with BOCHMANN safety CPUs and distributed I/O racks reduces wiring complexity and commissioning time.
- Certified SIL2 / PLd rating satisfies machinery directive (2006/42/EC) and process safety (IEC 61511) requirements out of the box.
- Compact DIN-rail footprint maximises cabinet space efficiency in retrofit and greenfield projects alike.
- Long product lifecycle with BOCHMANN’s documented spare-parts availability commitment — critical for 15–20 year plant lifecycles.
Complete System Bill of Materials
For a fully operational BOCHMANN safety output node, engineers typically specify the following alongside the SDO204:
- BOCHMANN Safety CPU / Controller (e.g., BOCHMANN SC series)
- BOCHMANN Safety Digital Input Module (SDI series) – for E-Stop and gate monitoring
- BOCHMANN Power Supply Module – 24 V DC, safety-rated
- BOCHMANN Backplane / Rack – matching slot configuration
- Safety-rated 24 V DC contactors or relays (downstream actuators)
- Shielded cable assemblies (IEC 60204-1 compliant)
- DIN-rail, terminal blocks, and cabinet earthing hardware
Contact support@konmask.com for a complete BOM quotation tailored to your application.
Compliance & Industry Standards
- IEC 62061 – Safety of machinery: Functional safety of electrical control systems
- ISO 13849-1 – Safety-related parts of control systems (PLd)
- IEC 61508 – Functional safety of E/E/PE safety-related systems (SIL 2)
- IEC 61511 – Functional safety for process industry SIS
- IEC 60204-1 – Safety of machinery: Electrical equipment of machines
- EU Machinery Directive 2006/42/EC
- CE Marked
Quality Assurance & Sourcing
Konmask.com sources BOCHMANN modules through authorised distribution and verified industrial surplus channels. Every unit undergoes:
- Visual inspection – housing integrity, label authenticity, connector condition
- Firmware / version verification – confirmed against BOCHMANN release documentation
- Functional power-on test – where applicable for surplus stock
- Anti-static packaging – ESD-safe bags and foam-lined cartons
- Traceable documentation – batch records available on request
All products are sold with a 90-day return-to-base warranty unless otherwise stated. New-in-box (NIB) units carry full manufacturer warranty where applicable.
How to Source This Part
- Add to Cart – In-stock units ship within 1–3 business days from our warehouse.
- Request a Quote – For volume orders (5+ units) or project BOM pricing, email support@konmask.com.
- Lead-time Orders – If stock is exhausted, we can source from our global supplier network. Typical lead time: 2–6 weeks.
- Expedite Options – Air freight and priority sourcing available for urgent plant shutdowns. Contact us with your required-by date.
- Export & Cross-border – We ship worldwide. HS Code 8537.10 applies; export documentation provided on request.
Application-Specific FAQ
Q: Can the SDO204 be used as a standalone safety relay replacement?
A: No — the SDO204 is a backplane-mounted module designed to operate within a BOCHMANN safety controller system. For standalone applications, a dedicated safety relay (e.g., PILZ PNOZ or Schmersal SRB series) is more appropriate.
Q: Is the SDO204 compatible with PROFINET or EtherNet/IP safety protocols?
A: The SDO204 communicates via the BOCHMANN proprietary safety backplane bus. For fieldbus integration, a BOCHMANN gateway or communication module is required. Contact us for compatibility details.
Q: What is the maximum switching current per output channel?
A: Please refer to the official BOCHMANN SDO204 datasheet for rated output current. Konmask can provide the datasheet upon request.
Q: Can I mix SDO204 with third-party I/O modules in the same rack?
A: BOCHMANN safety racks are designed for BOCHMANN-certified modules only. Mixing third-party modules may void safety certification and is not recommended.
Q: Do you offer programming or configuration support?
A: We supply hardware. For BOCHMANN safety PLC programming and system integration services, we can refer you to certified BOCHMANN system integrators in your region.
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