siemens
Siemens SIRIUS 3SE4 Safety Position Switch
Model: 3SE4122-1AA00
4-hour response · Pricing in SAR · Delivery across all KSA regions
3SE4122-1AA00 — Siemens SIRIUS 3SE4 Safety Position Switch
The Siemens SIRIUS 3SE4 is a safety position switch (interlock switch) for monitoring guard doors, access hatches, and movable protective guards on industrial machinery, providing the positive-opening contact action required by IEC 60947-5-1 Annex K to ensure the contact opens mechanically rather than relying on spring return — the critical safety property that prevents a welded contact from leaving a machine unsafely de-energised after a guard door closing event. The 3SE4 tongue actuator design operates when the tongue (fixed to the guard door) enters or exits the switch head, making and breaking the safety circuit contacts with a definite snap action independent of door closing speed.
The 3SE4 safety contact block provides 2NC + 1NO contact configuration in the standard version, with the NC contacts connected in the safety circuit and the NO contact providing machine status feedback to the PLC. IEC EN ISO 14119 interlock switch standard compliance is certified, covering the risk of defeat of the interlocking device — requiring a coded actuator variant of the 3SE4 where higher tamper resistance is required (Category 2 or 3 actuator coding). The IP67 sealed head and M20 conduit entry handle the dust, oil, and coolant splash environments of metalworking and food processing machinery. A solenoid locking variant prevents the guard door from being opened while the machine is in motion, adding guard locking (interlock with guard lock) to the interlock function for high-inertia machine applications.
In Saudi Arabia, the SIRIUS 3SE4 KSA is the standard guard door safety switch for machinery compliance with SASO 2728 / IEC 60204-1 and the machinery CE marking requirements of Saudi Arabia's industrial equipment import regulations. Panel builders and system integrators assembling machine safety circuits at Saudi industrial facilities routinely specify the 3SE4 for its compliance track record, wide range of mounting options (horizontal and vertical head mounting), and compatibility with the SIRIUS 3SK1 and 3SK2 safety relay/controller range. The solenoid locking variant is increasingly specified at Saudi Aramco and SABIC facilities for robot cell guard doors where machine coastdown time exceeds the guard door opening time.
Razz Middle East stocks 3SE4 safety switches in standard and solenoid locking variants with a range of actuator coding levels and head mounting configurations.
Technical Specifications
Full specifications for the 3SE4122-1AA00
- Contact Config
- 2NC + 1NO (positive-opening)
- Rated Current
- 6 A at 250 V AC
- Actuator
- Tongue type, M12 coded options
- Enclosure
- IP67
- Head Material
- Glass fibre reinforced thermoplastic
- Safety Standard
- EN ISO 14119, IEC 60947-5-1 Annex K
- Mounting
- Horizontal or vertical head
- Solenoid Lock
- Optional (guard locking version)
- Conduit Entry
- M20
- Compliance
- CE Machinery Directive, TÜV
Key Features & Benefits
- IEC 60947-5-1 Annex K positive-opening contacts mechanically force NC contacts open when the actuator tongue leaves the switch head, regardless of contact welding — the fundamental property required by machinery safety standards.
- EN ISO 14119 interlock standard compliance with coded actuator option (Category 2 and 3 coding) provides tamper resistance against deliberate defeat of the guard interlocking device, required for higher-risk machinery at Saudi industrial facilities.
- IP67 sealed head withstands the coolant, oil, and swarf-laden environments of metal cutting machinery and the wash-down environments of food processing equipment without degradation of the safety contact mechanism.
- Solenoid guard locking variant prevents guard door opening while machine is in motion, providing the interlock with guard lock function required for high-inertia machines where coastdown time creates residual risk after drive de-energisation.
- 2NC + 1NO contact configuration provides two independent NC contacts for the safety circuit (cross-monitored by the safety relay) and one NO contact for run-permit feedback to the PLC — covering the contact requirements of EN ISO 13849-1 Category 3 and 4 architectures.
- Horizontal and vertical head mounting options with the same switch body accommodate the diverse guard door geometries found in Saudi machine builders' designs without requiring different switch part numbers.
- Compatibility with SIRIUS 3SK1 safety relays and 3SK2 safety controllers allows the 3SE4 to integrate directly into Siemens' complete machine safety architecture without cross-brand interface relay complications.
Industrial Applications in Saudi Arabia
- Guard door monitoring for CNC machining centre and lathe tool change doors at Saudi precision manufacturing facilities, where solenoid locking prevents door access during spindle rotation and positive-opening contacts satisfy CE marking requirements.
- Robot cell access gate monitoring at automotive and manufacturing facilities in NEOM and Vision 2030 industrial zones, where coded 3SE4 actuators provide Category 3 tamper resistance against intentional defeat.
- Packaging machine infeed and discharge guard monitoring at Saudi food and pharmaceutical manufacturers, where IP67 protection withstands wash-down cleaning and positive-opening contacts satisfy EN ISO 13849-1 PLd requirements.
- Press brake and power press guard door safety interlocks at metal fabrication workshops in Saudi Arabia's industrial areas, where the 3SE4's robust construction handles the vibration and shock of press cycle impacts near the mounting location.
- Conveyor access hatch and maintenance door monitoring at automated warehouse and logistics facilities, where AS-i safe slave versions of the 3SE4 reduce safety interlock wiring to the single AS-i flat cable.
- Pharmaceutical clean room access monitoring at Saudi API manufacturers, where the IP67 sealed 3SE4 withstands daily cleaning agent spray without corrosion and provides clean room entry interlock integration with the building access control system.
- Mining and cement plant conveyor walkway access gate monitoring at Saudi mining sites and cement plants, where the 3SE4 provides belt conveyor guarding interlocks compliant with IEC 60204-1 Section 9.3 movable guard requirements.
Industrial Supplier in Saudi Arabia
Get a Quote for the Siemens SIRIUS 3SE4 Safety Position Switch
We respond within 4 business hours. Send model 3SE4122-1AA00 for competitive pricing in SAR with delivery across Saudi Arabia and the GCC.
Frequently Asked Questions — 3SE4122-1AA00
Common questions from buyers in Saudi Arabia and the GCC