SCHMERSAL S1 Series Limit Sensor Switch

Sensor Switch, Limit Sensor SwitchSCHMERSAL

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2025/7/4 Update

SCHMERSAL S1 Series Limit Sensor Switch
— The S1 series features metal housing across all variants. Contact counts vary: 1 contact, 2 contacts, 2/4 contacts (with additional stainless steel external parts for this spec), and 3/4 contacts.

Technical Features

The S1 series features metal housing across all variants.

Contact counts vary: 1 contact, 2 contacts, 2/4 contacts (with additional stainless steel external parts for this spec), and 3/4 contacts.

Products Specifications

Property	T 422	T/M 441	T 454	T/M 461
Main Features	S1 series 1 contact Metal housing	S1 series 2 contacts Metal housing	S1 series 2 or 4 contacts Metal housing Stainless steel external parts	S1 series 3 or 4 contacts Metal housing
Technical Parameters
Electrical data
Switching principle	Slow action, positive break NC contacts	Slow action or snap action, positive break NC contacts	Slow action, positive break NC contacts	Slow action or snap action, positive break NC contacts
Max. switching capacity U/I	400 VAC / 4 A	Snap action type: 230 VAC / 4 A	230 VAC / 4 A	230 VAC / 4 A, 400 VAC / 4 A
Max. switching capacity U/I	400 VAC / 4 A	Slow action type: 400 VAC / 4 A	230 VAC / 4 A	230 VAC / 4 A, 400 VAC / 4 A
Mechanical data
Housing material	Cast iron, galvanised, painted surface
Cable entry	2 x M20	2 x M20	2 x M20	2 x M20
Connection	Screw terminals
Cable cross-section ¹⁾	Max. 2.5 mm²
Dimensions (WxHxD)	75 x 71 x 63 mm	75 x 99 x 63 mm	83 x 127 x 64 mm	83 x 155 x 64 mm
Ambient conditions
Ambient temperature	-30 °C … +90 °C -40 °C … +200 °C	-30 °C … +90 °C -40 °C … +200 °C	-40 °C … +70 °C	-30 °C … +90 °C -40 °C … +200 °C
Degree of protection	IP65	IP65	IP66, IP67	IP65
Safety classification
Standard	IEC 60947-5-1
B10D NC contacts	2,000,000
Certificates
Other versions
ATEX / IECEx explosion-proof	–	Zones 21, 22	Zones 1, 21	–
Gold-plated contacts	0.3 µm	0.3 µm	0.3 µm	0.3 µm

S1 Series recommended models and ordering information

Switching system	Contacts	Actuator	Type designation	Article no.
Snap action	1 NO / 1 NC	Extended plunger – 2 S	M2S 015-11Y	101160497
		Roller plunger K	MK 015-11Y	101160412
		Plunger S	MS 015-11Y	101170443
		Rod V	MV 015-11Y	101174600
		Roller arm 3H	MV3H 015-11Y	101058452
		Roller arm H	MVH 015-11Y	101160442
		Plunger S	TS 015-11Y	101170456
Slow action	1 NO / 1 NC	Angled roller lever 2K	T2K 015-11Y	101170062
Slow action	1 NO / 1 NC	Extended plunger – 2 S	T2S 015-11Y	101161467
Slow action	2 NC	Roller plunger K	TK 015-02Y	101054782
	2 NO / 1 NC	Extended plunger – 2 S	T2S 016-21Y	101054869
	3 NC	Plunger S	TS 016-03Y	101168064
Snap action	3 NC	Rod V	TV 016-03Y	101060212
Slow action	2 NO / 2 NC	Roller plunger K	TK 017-22Y	101054954
Snap action	2 NO / 2 NC	Roller plunger K	MK 017-22Y	101164045
Auxiliary actuating lever		Spring rod 6H		101064152
		Spring rod lever on shaft 4H		101064151
		Roller arm 3H		101064143
		Roller arm 7H		101064153
		Roller arm 8H		101064239
		Roller arm H		101064128
		Rod lever 10H		101064157
		Rod lever 9H		101064156

Advantages Of SCHMERSAL Limit Sensor Switch

System-universal series

Position detection and monitoring, compact and rugged design.

Thanks to these features, the new PS series of limit switches is suitable for a wide range of applications in all areas of mechanical and plant engineering as well as elevator technology.

Overview of the advantages of the new PS series of limit switches:

Reliable position detection
Wide range of uses
Safe and reliable
Modular design, can be combined in various ways

Application areas

In accordance with ISO 14119, the Category 1 PS series of limit switches is suitable for confirming and monitoring the position of moving parts on machines and of laterally moving or hinged guards, and can be used in all industrial environments.

The PS series of limit switches, with protection ratings up to IP66 and IP67, meets the requirements for use in harsh environments.

Design and operating principle

All PS series limit switches are equipped with positive break NC contacts in accordance with IEC 60947-5-1, and are available in snap-action and slow-action versions. In conjunction with a suitable safety controller, Performance Level PL d can be achieved with a single limit switch. In accordance with ISO 13849-1, Performance Level PL e can be achieved using two limit switches.

Flexible solutions

Switching elements with up to 3 contacts

Switching elements with three contacts ensure redundant disconnection and are supplied with a signalling contact. All switching elements with various contact combinations are equipped with electrically isolated contacts with positive break NC contacts.

Latching function

To latch the switching status, versions with snap action and an optional latching function are available. In these versions, the actuating element must be manually reset.

Modular diversity

The modular design gives all series a consistent range of components, reduces the number of different versions, reduces the amount of work required for storage and increases availability.