SIRIUS 3SK1 Safety Relays

SIRIUS 3SK1 safety relays

SIRIUS 3SK1 safety relays are the key elements of a consistent, cost-effective safety chain. Whether you need EMERGENCY-STOP disconnection, protective door monitoring, light arrays, laser scanners or the protection of presses or punches – with SIRIUS safety relays 22.5 mm wide every safety application can be implemented to optimum effect in terms of engineering and price.

The following safety-oriented functions are available:

Monitoring the safety functions of sensors
Monitoring the sensor leads
Monitoring correct functioning of safety relays
Monitoring the actuators in the shutdown circuit
Safety-oriented disconnection when dangers arise

SIRIUS 3SK1 safety relays satisfy the most stringent requirements of IEC 61508/IEC 62061 (SIL 3) and EN ISO 13849-1 (PL e).

SIRIUS 3SK1 safety relays stand out due to their flexibility for both parameterization and system designs with several evaluation units. Optimized solutions when selecting components are facilitated by a clearly structured component range:

Standard basic units
Advanced basic units
Output expansions
Input expansions
Accessories

The 3SK1 Standard basic units are characterized by the following features:

Compact design
Simple operation
Relay and semiconductor outputs
Economical solution

However, the 3SK1 Advanced basic units also offer the following:

Universal application opportunities thanks to multifunctionality
Time-delayed outputs
Expansion of inputs and outputs

In the case of Advanced basic units, the 3ZY1 device connector allows safety functions involving several sensors and actuators to be constructed very quickly.

The 3SK1 Standard and Advanced series are a high-quality replacement for the 3TK28 safety relays. In their narrower design, and equipped with greater functionality, they can replace every 3TK28 device. The only exceptions are devices with special functions, such as 3TK28 26, 3TK28 45 and the 3TK28 10 devices. See below for an order number reassignment table 3TK28 to 3SK1.

Functional overview of the 3SK1 series

Type	Standard basic units		Advanced basic units
	Relay enabling circuits	Solid-state enabling circuits	Relay enabling circuits	Solid-state enabling circuits
Sensors
Mechanical	✓	✓	✓	✓
Single-ended	✓	✓	✓	✓
Antivalent	--	--	✓	✓
Expandable	--	✓ by means of cascading	✓	✓
Parameter
Start (auto/monitored)	✓	✓	✓	✓
Sensor connection, 2 x 1-channel/ 1 x 2-channel	--	✓	✓	✓
Crossover monitoring	✓ Using wiring	✓	✓	✓
Start test ON/OFF	--	✓	✓	✓
Monitoring of two-hand operation consoles	--	--	✓	✓
Enabling circuits
Instantaneous	✓	✓	✓	✓
Time-delayed	--	--	✓	✓
Expandable with relay enabling circuits	✓ Using wiring	✓ Using wiring	✓	✓
Device connectors	--	--	✓	✓
Rated control supply voltage
24 V DC	✓	✓	✓	✓
115 … 240 V AC/DC	✓	--	✓¹⁾	✓¹⁾

✓ Available

-- Not available

1) Possible using 3SK1 230 power supply via device connector.

3SK1 12 and 3SK1 112 safety relays with DIP switch

The 3 SK1 12 and 3SK1 112 safety relays are configurable safety relays. They are used as evaluation units for typical safety chains (detect, evaluate, deactivate). A number of functions can be set using the DIP switches on the front. This makes the 3SK1 12 and 3SK1 112 universally usable.

OFF	DIP switch no.	ON
Autostart sensor input	1	Monitored start sensor input
without crossover monitoring	2	With crossover monitoring
2 x single-channel sensor connection	3	1 x 2-channel sensor connection
with start test	4	without start test

Number of safe outputs

	Relay enabling circuits		Solid-state enabling circuits		3ZY1 device connector
	Instantaneous	Delayed	Instantaneous	Delayed
3SK1 Standard basic units
3SK1 111	3	--	--	--	--
3SK1 112	--	--	2	--	--
3SK1 Advanced basic units
3SK1 120	--	--	1	--	✓
3SK1 121-.AB40	3	--	--	--	✓
3SK1 121-.CB4.	2	2	--	--	✓
3SK1 122-.AB40	--	--	3	--	✓
3SK1 122-.CB4.	--	--	2	2	✓
3SK1 expansion units
3SK1 211	4	--	--	--	✓
3SK1 213	3	--	--	--	✓

✓ available

-- not available

Can be expanded by adding the 3RM1 motor starter

With previous safety relay and motor starter designs an enormous amount of wiring was required to monitor the motor starters in safety applications.

Traditional system design

With the integration of the SIRIUS 3RM1 motor starter into the SIRIUS 3SK1 safety relay system family, this wiring has been minimized for the first time.

Motors up to 3 kW can easily be integrated into the safety relay system using SIRIUS 3ZY1 device connectors, without having to run a cable between the evaluation unit and the motor starter.

System design using 3SK1 and 3RM1

Order number reassignment table

The table below lists the existing 3TK28 order numbers with the corresponding 3SK1 order numbers.

Order number 3TK28 basic unit	Order number 3SK1 Standard basic units	Order number 3SK1 Advanced basic units
3TK28 20
3TK28 20-1AJ20	3SK1 111-1AW20	3SK1 121-1AB40 + 3SK1 230-1AW20
3TK28 20-1AL20	3SK1 111-1AW20	3SK1 121-1AB40 + 3SK1 230-1AW20
3TK28 20-1CB30	3SK1 111-1AB30	3SK1 121-1AB40
3TK28 20-2AJ20	3SK1 111-2AW20	3SK1 121-2AB40 + 3SK1 230-2AW20
3TK28 20-2AL20	3SK1 111-2AW20	3SK1 121-2AB40 + 3SK1 230-2AW20
3TK28 20-2CB30	3SK1 111-2AB30	3SK1 121-2AB40
3TK28 21
3TK28 21-1CB30	3SK1 111-1AB30	3SK1 121-1AB40
3TK28 21-2CB30	3SK1 111-2AB30	3SK1 121-2AB40
3TK28 22
3TK28 22-1CB30	3SK1 111-1AB30	3SK1 121-1AB40
3TK28 22-2CB30	3SK1 111-2AB30	3SK1 121-2AB40
3TK28 23
3TK28 23-1CB30	3SK1 111-1AB30	3SK1 121-1AB40
3TK28 23-2CB30	3SK1 111-2AB30	3SK1 121-2AB40
3TK28 24
3TK28 24-1AJ20	3SK1 111-1AW20	3SK1 121-1AB40 + 3SK1 230-1AW20
3TK28 24-1AL20	3SK1 111-1AW20	3SK1 121-1AB40 + 3SK1 230-1AW20
3TK28 24-1BB40	3SK1 111-1AB30	3SK1 121-1AB40
3TK28 24-1CB30	3SK1 111-1AB30	3SK1 121-1AB40
3TK28 24-2AJ20	3SK1 111-2AW20	3SK1 121-2AB40 + 3SK1 230-2AW20
3TK28 24-2AL20	3SK1 111-2AW20	3SK1 121-2AB40 + 3SK1 230-2AW20
3TK28 24-2BB40	3SK1 111-2AB30	3SK1 121-2AB40
3TK28 24-2CB30	3SK1 111-2AB30	3SK1 121-2AB40
3TK28 25
3TK28 25-1AB20	3SK1 111-1AW20	3SK1 121-1AB40 + 3SK1 230-1AW20
3TK28 25-1AJ20	3SK1 111-1AW20	3SK1 121-1AB40 + 3SK1 230-1AW20
3TK28 25-1AL20	3SK1 111-1AW20	3SK1 121-1AB40 + 3SK1 230-1AW20
3TK28 25-1BB40	3SK1 111-1AB30	3SK1 121-1AB40
3TK28 25-2AB20	3SK1 111-2AW20	3SK1 121-2AB40 + 3SK1 230-2AW20
3TK28 25-2AJ20	3SK1 111-2AW20	3SK1 121-2AB40 + 3SK1 230-2AW20
3TK28 25-2AL20	3SK1 111-2AW20	3SK1 121-2AB40 + 3SK1 230-2AW20
3TK28 25-2BB40	3SK1 111-2AB30	3SK1 121-2AB40
3TK28 27
3TK28 27-1AB20	--	--
3TK28 27-1AB21	--	--
3TK28 27-1AJ20	--	3SK1 121-1CB42 + 3SK1 230-1AW20
3TK28 27-1AJ21	--	3SK1 121-1CB41 + 3SK1 230-1AW20
3TK28 27-1AL20	--	3SK1 121-1CB42 + 3SK1 230-1AW20
3TK28 27-1AL21	--	3SK1 121-1CB41 + 3SK1 230-1AW20
3TK28 27-1BB40	--	3SK1 121-1CB42
3TK28 27-1BB41	--	3SK1 121-1CB41
3TK28 27-2AB20	--	--
3TK28 27-2AB21	--	--
3TK28 27-2AJ20	--	3SK1 121-2CB42 + 3SK1 230-2AW20
3TK28 27-2AJ21	--	3SK1 121-2CB41 + 3SK1 230-2AW20
3TK28 27-2AL20	--	3SK1 121-2CB42 + 3SK1 230-2AW20
3TK28 27-2AL21	--	3SK1 121-2CB41 + 3SK1 230-2AW20
3TK28 27-2BB40	--	3SK1 121-2CB42
3TK28 27-2BB41	--	3SK1 121-2CB41
3TK28 28
3TK28 28-1AB20	--	--
3TK28 28-1AB21	--	--
3TK28 28-1AJ20	--	3SK1 121-1CB42 + 3SK1 230-1AW20
3TK28 28-1AJ21	--	3SK1 121-1CB41 + 3SK1 230-1AW20
3TK28 28-1AL20	--	3SK1 121-1CB42 + 3SK1 230-1AW20
3TK28 28-1AL21	--	3SK1 121-1CB41 + 3SK1 230-1AW20
3TK28 28-1BB40	--	3SK1 121-1CB42
3TK28 28-1BB41	--	3SK1 121-1CB41
3TK28 28-2AB20	--	--
3TK28 28-2AB21	--	--
3TK28 28-2AJ20	--	3SK1 121-2CB42 + 3SK1 230-2AW20
3TK28 28-2AJ21	--	3SK1 121-2CB41 + 3SK1 230-2AW20
3TK28 28-2AL20	--	3SK1 121-2CB42 + 3SK1 230-2AW20
3TK28 28-2AL21	--	3SK1 121-2CB41 + 3SK1 230-2AW20
3TK28 28-2BB40	--	3SK1 121-2CB42
3TK28 30
3TK28 30-1AJ20	3SK1 211-1BW20	3SK1 211-1BB40
3TK28 30-1AL20	3SK1 211-1BW20	3SK1 211-1BB40
3TK28 30-1CB30	3SK1 211-1BB40	3SK1 211-1BB40
3TK28 30-2AJ20	3SK1 211-2BW20	3SK1 211-2BB40
3TK28 30-2AL20	3SK1 211-2BW20	3SK1 211-2BB40
3TK28 30-2CB30	3SK1 211-1AB30	3SK1 211-2BB40
3TK28 34
3TK28 34-1AB20	--	--
3TK28 34-1AJ20	--	3SK1 121-1AB40 + 3SK1 230-1AW20
3TK28 34-1AL20	--	3SK1 121-1AB40 + 3SK1 230-1AW20
3TK28 34-1BB40	--	3SK1 121-1AB40
3TK28 34-2AB20	--	--
3TK28 34-2AJ20	--	3SK1 121-2AB40 + 3SK1 230-2AW20
3TK28 34-2AL20	--	3SK1 121-2AB40 + 3SK1 230-2AW20
3TK28 34-2BB40	--	3SK1 121-2AB40
3TK28 40
3TK28 40-1BB40	3SK1 112-1BB40	3SK1 122-1AB40
3TK28 40-2BB40	3SK1 112-2BB40	3SK1 122-2AB40
3TK28 41
3TK28 41-1BB40	3SK1 112-1BB40	3SK1 122-1AB40
3TK28 41-2BB40	3SK1 112-2BB40	3SK1 122-2AB40
3TK28 42
3TK28 42-1BB41	--	3SK1 122-1CB41
3TK28 42-1BB42	--	3SK1 122-1CB42
3TK28 42-1BB44	--	3SK1 122-1CB44
3TK28 42-2BB41	--	3SK1 122-2CB41
3TK28 42-2BB42	--	3SK1 122-2CB42
3TK28 42-2BB44	--	3SK1 122-2CB44
3TK28 50
3TK28 50-1AJ20	3SK1 111-1AW20 + 3SK1 213-1AJ20	3SK1 120-1AB40 + 3SK1 213-1AB40
3TK28 50-1AL20	3SK1 111-1AW20 + 3SK1 213-1AL20	3SK1 120-1AB40 + 3SK1 213-1AB40
3TK28 50-1BB40	3SK1 111-1AB30 + 3SK1 213-1AB40	3SK1 120-1AB40 + 3SK1 213-1AB40
3TK28 50-2AJ20	3SK1 111-2AW20 + 3SK1 213-2AJ20	3SK1 120-2AB40 + 3SK1 213-2AB40
3TK28 50-2AL20	3SK1 111-2AW20 + 3SK1 213-2AL20	3SK1 120-2AB40 + 3SK1 213-2AB40
3TK28 50-2BB40	3SK1 111-2AB30 + 3SK1 213-2AB40	3SK1 120-2AB40 + 3SK1 213-2AB40
3TK28 51
3TK28 51-1AJ20	3SK1 111-1AW20 + 3SK1 213-1AJ20	3SK1 120-1AB40 + 3SK1 213-1AB40
3TK28 51-1AL20	3SK1 111-1AW20 + 3SK1 213-1AL20	3SK1 120-1AB40 + 3SK1 213-1AB40
3TK28 51-1BB40	3SK1 111-1AB30 + 3SK1 213-1AB40	3SK1 120-1AB40 + 3SK1 213-1AB40
3TK28 51-2AJ20	3SK1 111-2AW20 + 3SK1 213-2AJ20	3SK1 120-2AB40 + 3SK1 213-2AB40
3TK28 51-2AL20	3SK1 111-2AW20 + 3SK1 213-2AL20	3SK1 120-2AB40 + 3SK1 213-2AB40
3TK28 51-2BB40	3SK1 111-2AB30 + 3SK1 213-2AB40	3SK1 120-2AB40 + 3SK1 213-2AB40
3TK28 52
3TK28 52-1AL20	3SK1 111-1AW20 + 3SK1 213-1AL20	3SK1 120-1AB40 + 3SK1 213-1AB40
3TK28 52-1BB40	3SK1 111-1AB30 + 3SK1 213-1AB40	3SK1 120-1AB40 + 3SK1 213-1AB40
3TK28 52-2AL20	3SK1 111-2AW20 + 3SK1 213-2AL20	3SK1 120-2AB40 + 3SK1 213-2AB40
3TK28 52-2BB40	3SK1 111-2AB30 + 3SK1 213-2AB40	3SK1 120-2AB40 + 3SK1 213-2AB40
3TK28 53
3TK28 53-1BB40	3SK1 111-1AB30 + 3SK1 213-1AB40	3SK1 120-1AB40 + 3SK1 213-1AB40
3TK28 53-2BB40	3SK1 111-2AB30 + 3SK1 213-2AB40	3SK1 120-2AB40 + 3SK1 213-2AB40
3TK28 56
3TK28 56-1BB40	3SK1 213-1AB40	3SK1 213-1AB40
3TK28 56-2BB40	3SK1 213-2AB40	3SK1 213-2AB40
3TK28 57
3TK28 57-1BB41	--	3SK1 213-1AB40 (delay as for basic unit)
3TK28 57-1BB42	--	3SK1 213-1AB40 (delay as for basic unit)
3TK28 57-1BB44	--	3SK1 213-1AB40 (delay as for basic unit)
3TK28 57-2BB41	--	3SK1 213-2AB40 (delay as for basic unit)
3TK28 57-2BB42	--	3SK1 213-2AB40 (delay as for basic unit)
3TK28 57-2BB44	--	3SK1 213-2AB40 (delay as for basic unit)

Order No. scheme

Digit of the Order No.	1. - 3. ❒❒❒	4. ❒	5. ❒	6. ❒	7. ❒	–	8. ❒	9. A	10. ❒	11. ❒	12. ❒
Safety relays	3SK
Generation		❒
Device version			❒
Device series				❒
Type of outputs					❒
Connection type							❒
Rated control supply voltage									❒
Type of rated control supply voltage										❒
Time delay											❒
Example	3SK	1	1	2	1	–	1	A	B	4	0

Note:

The Order No. scheme is presented here merely for information purposes and for better understanding of the logic behind the order numbers.

Область применения

SIRIUS 3SK1 safety relays are used mainly in autonomous safety applications which are not connected to a safety-oriented bus system. Their function here is to evaluate the sensors and the safety-oriented shutdown of hazards. Also they check and monitor the sensors, actuators and safety-oriented functions of the safety relay.

Особенности

General

Suitable for all safety applications because of its compliance with the highest safety requirements (SIL 3 PL e)
Universally usable thanks to adjustable parameters
Usable worldwide thanks to globally valid certificates
Compact SIRIUS design
Device connectors with standard rail mounting for flexible connectability and expandability
Removable terminals for greater plant availability
Yellow terminal covers clearly identify the device as a safety component.
Sensor cable up to 2 000 m long allows it to be used in large-scale plants.

Relay outputs

Different voltages can be switched through the floating contacts
Higher currents can be switched with relay contacts

Solid-state outputs

Wear-free
Suitable for operation in fast switching applications
Insensitive to vibrations and dirt
Good electrical endurance

Power outputs (3SK1 213 output expansion)

Different voltages can be switched through the floating contacts
The power relay contacts allow currents of up to 10 A AC-15/DC-13 to be connected.
Long mechanical and electrical endurance
Protective separation between enabling circuits and between enabling circuits and electronics

Can be expanded by adding the 3RM1 motor starter

SIRIUS 3SK1 safety relays are ideal for combining with the 3RM1 motor starters.

Combinations are made by means of

SIRIUS device connectors (3SK1 Advanced) or
conventional wiring (3SK1 Standard and Advanced).

This makes collective shutdown very easy in assemblies. The wiring, and ultimately the shutting down of the control supply voltage for the expansion components in EMERGENCY-STOP situations, is performed via the device connector. There is no further need for complex looping of the connecting cables between the safety relay to the motor starters.

The 3RM1 motor starter combines the benefits of semiconductor technology and relay technology. This combination is also known as hybrid technology.

The hybrid technology in the motor starter is characterized by the following features:

The inrush current in the case of motorized loads is conducted briefly via the semiconductors. Advantages include protection of the relay contacts and a long service life due to low wear.
The uninterrupted current is conducted via relay contacts. Advantages include lower heat losses compared with the semiconductor.
Shutdown is implemented again via the semiconductor. the contacts are only slightly exposed to arcs, and this results in a longer service life.
Integrated overload protection

Note:

For the SIRIUS 3RM1 motor starter, see "Load Feeders and Motor Starters for Use in Switchgear Cabinets" → "SIRIUS 3RM1 Motor Starter".

3ZY1 device connector

Using 3ZY1 device connectors to combine devices reduces the time required to configure and wire the components. At the same time errors are avoided during wiring, and this considerably reduces the testing required for the fully-assembled application.

Microprocessor systems

Flexible use thanks to many different integrated functions
Easy parameterization using DIP switches on the front
High functional reliability based on extensive monitoring functions
Operated by the machine control
Also connection of non-contact sensors (light arrays, light barriers etc.)

Configuration and stock keeping

Variable setting options by means of DIP switches, a wide voltage range and a special power supply unit reduce the cost of keeping stocks and the considerations involved in configuration where the evaluation units to be selected are concerned.

Spring-type terminal with push-in functionality

Push-in connections are a form of spring-type terminals allowing fast wiring without tools for rigid conductors or conductors equipped with end sleeves.

As with other spring-type terminals, a screwdriver (with 3.0 x 0.5 mm blade) is required to disconnect the conductor. The same tool can also be used to wire fine-stranded or stranded conductors with no end finishing.

The advantages of the push-in terminals are found, as with all spring-type terminals, in speed of assembly and disassembly and vibration-proof connection. There is no need for the checking and tightening required with screw-type connections.

Технические данные


Bestell-Nr.		3SK1
Produkt-Bezeichnung		Sicherheitsschaltgerät
Breite	mm	22,5
Höhe	mm	100
Tiefe	mm	120
Allgemeine technische Daten
Umgebungstemperatur
während Betrieb	°C	-25 … +60
während Lagerung	°C	-40 … +80
Aufstellungshöhe bei Höhe über NN maximal	m	2 000
Luftdruck
gemäß SN 31205	hPa	900 … 1 060
Schockfestigkeit		8g / 11 ms
Schwingfestigkeit gemäß IEC 60068-2-6		5 ... 500 Hz: 0,75 mm
Schutzart IP des Gehäuses		IP20
Berührungsschutz gegen elektrischen Schlag		fingersicher
Isolationsspannung Bemessungswert	V	300
Stoßspannungsfestigkeit Bemessungswert	V	4 000
Sicherheits-Integritätslevel (SIL) für zeitverzögerten Freigabekreis gemäß IEC 61508		SIL3
Performance Level (PL) für zeitverzögerten Freigabekreis gemäß ISO 13849-1		e
Elektromagnetische Verträglichkeit (EMV)
EMV-Störaussendung		IEC 60947-5-1, Klasse B
Eignungsnachweis		in Vorbereitung

SIRIUS 3SK1 Safety Relays

Информационные материалы

Functional overview of the 3SK1 series

3SK1 12 and 3SK1 112 safety relays with DIP switch

Number of safe outputs

Can be expanded by adding the 3RM1 motor starter

Order number reassignment table

Order No. scheme

Область применения

Особенности

General

Relay outputs

Solid-state outputs

Power outputs (3SK1 213 output expansion)

Can be expanded by adding the 3RM1 motor starter

3ZY1 device connector

Microprocessor systems

Configuration and stock keeping

Spring-type terminal with push-in functionality

Технические данные