Siemens Contact Block, 3SE5, 1NO, 2NC

The SIRIUS 3SE5 limit switches provide the dependable performance required in everyday industrial applications thanks to their modular, consistent design and wide choice of variants and operating mechanisms.
The standard design and function of the limit switches not only make it easy to select the right switch but also enable quick and easy installation, wiring and maintenance.
The SIRIUS 3SE5 is designed for safety applications up to Category 4 according to ISO 13849-1 (EN 954-1) when you select the right product and use them properly in conjunction with fail-safe evaluation units such as the 3TK28, ASISafe, SIMATIC or SINUMERIK.

Open-type position switch IP20 (3SE5 250-*****)
Plastic enclosures according to EN 50047, 31 mm wide, IP65, 1 cable entry (3SE5 232-***** & 3SE5 234-*****)
Plastic enclosures according to EN 50041, 40mm wide, IP66/IP67, 1 cable entry (3SE5 132-***** & 3SE5 134-*****)
Plastic enclosures, 50 mm wide, IP66/IP67, 2 cable entries (3SE5 242-*****)
Metal enclosures according to EN 50047, 31 mm wide, IP66/IP67, 1 cable entry (3SE5 212-***** & 3SE5 214-*****)
Metal enclosures according to EN 50041, 40mm wide, IP66/IP67, 1 cable entry (3SE5 112-*****)
Metal enclosures, 56 mm wide, IP66/IP67, 3 cable entries (3SE5 122-*****)
XL metal enclosures with 4 to 6 contacts, 56 mm wide, IP66/IP67, 3 cable entries (3SE5 162-*****)
Enclosures with an ambient temperature to -40°C (3SE5 ***-*****-1AJ0)

With contact blocks with two or three contacts (screw terminals) designed as slow-action or snap-action contacts; the slow-action contacts also with make-before-break (refer to tech. data)
Optional LED status display (3SE5 ***-1K*** & 3SE5 ***-1L***)
With M20 ´ 1.5 connection thread or mounted 4 or 5 pole M12 connector socket (refer to tech. data)
Versions with increased corrosion protection (3SE5 ***-*****-1CA0)
Versions for operating temperature up to -40°C (3SE5 ***-*****-1AJ0)

Easy replacement and mounting of actuator heads through plug mounting with uniform interface
Integrated chlorinated rubber diaphragm (high functional safety in cold and aggressive environments)
All actuator heads can be rotated in 22.5° increments
Mounting time reductions of up to 25% through rapid connection system for plastic enclosures
Versions with 3-pole contact blocks ensure increased safety through redundant disconnection and additional signalling while featuring the same enclosure dimensions as 2-pole contact blocks
IP65/66/67 protection
Switching points and mounting according to EN 50041 or EN 50047
Built in rounded plunger with 3mm over travel, (total travel 9mm) for greater tolerance when switching

This contact block is intended for position switches, particularly in industrial automation. It features a 1NO, 2NC configuration, providing adaptable connections for various applications. With a weight of 0.024kg, it operates effectively within a temperature range of -25 to +85°C. Its screw terminal design ensures secure connections for straightforward installation.

• Positive opening design improves operational safety
• 6kV surge voltage resistance guards against voltage spikes
• Compatible with high insulation voltage of 400V

• Safety circuits in automation systems
• Control panels and machinery interfaces
• Conveyor systems for enhanced operational safety
• Industrial environments with challenging conditions

Yes, it functions between -25°C and +85°C.

Yes, it includes 2NC and 1NO auxiliary contacts.

Yes, it features a surge voltage resistance of 6kV.

Yes, it utilises a screw terminal for connections.

Safety Limit Switch