When it comes to space-saving switching devices, our SIGUARD safety relay combinations fully reflect market trends. However, not only are they small, but they are great performers. This is because they have a contact arrangement that allows them to switch with intrinsic safety. Normally Closed (NC) and normally open (NO) contacts are positively driven in pairs. This means that if one of the contacts welds, then the other contact interrupts the circuit. A positively driven NC contact detects the faulted NO contact. This means that the safety relay would also drop out if all of the contacts of the circuit to be protected were to weld.

Standard Safety Relays (3TK282.)
These are used to safely monitor E-Stop devices and protective doors. In addition to instantaneous release contacts, the SIGUARD basic devices are also equipped with off-delay release contacts for Stop category 1. E-Stop devices must have priority over all other functions. Resetting the drives must not initiate a restart. The E-Stop must either operate as a Stop according to Cat. 0 or Cat. 1. The basic devices of the SIRIUS Safety relays can be used for E-Stop applications up to maximum Cat. 4 according to EN 954-1. In the case of protective door monitors according to EN 1088, a distinction is made between interlocking guards and interlocking guards with tumbler The SIRIUS Safety relays are also ideal for this purpose. Controllers available up to Cat. 4 according to EN 954-1.
Control Supply Voltages - 24 VAC/DC, 115 VAC, 230 VAC
Automatic and/or Manual Start options
Versions for Stop Category 0 (immediate shutdown, no time delay)
Versions for Stop Category 1 (controlled shutdown, adjustable time delayed)
Compact housing widths of 22mm and 45mm
Certified up to Category 4 acc. to EN954-1

Relay Expansion Blocks
These must not be operated separately in safety circuits, but must be combined with a basic device. The category of a controller with expansion unit corresponds to that of the basic device.
Control Supply Voltages - 24 VAC/DC, 115 VAC, 230 VAC
3TK2830 Series offers 4 N.O. safe expansion contacts, 22mm width
3TH42 Series Relays offer 8 N.O. positive guided expansion contacts
3TH43 Series Relays offer 10 N.O. positive guided expansion contacts

Two Hand Control Relays - Press Control Devices (3TK2834)
The two-hand control is a device the operator's hands are required to be on the two-hand control panel at the same time within a time window of 500 ms. These press control systems are ideal for controllers of excenter, hydraulic and fly presses up to Cat. 4 according to EN 954-1. Type III C according to EN 574 is also available especially for presses.
Control Supply Voltages - 24 VAC/DC, 115 VAC, 230 VAC
2 N.O. Safe Contacts and 2 N.C. Signalling Contacts
Certified up to Category 4 acc. to EN954-1

The SIRIUS Safety Relays - Solid State Outputs (3TK284.)

.........Fast, safe and wear-free switching!

Safety Relays with electronic components are clearly establishing themselves in safety-related applications. It’s natural – the advantages are quite clear: Due to permanent function monitoring and wear-free operation, a significantly higher switching frequency and longer electrical lifetime is achieved. The compact and light devices also feature an input that allows for cascading of multiple relays or even a command from a PLC that permit safe logical circuits to be created. The devices can be supplemented by the 3TK2830 expansion units if several or electrically isolated (dry contact) enable circuits are required in your application. It goes without saying that you can depend on our electronic safety combinations providing a maximum of safety; they are certified for Category 4 according to EN 954-1 and SIL 3 (Safety Integrity Level) according to IEC 61508. SIGUARD electronic safety combinations can be controlled through 1 or 2 channels. They are suitable for monitored as well as automatic start, for EMERGENCY OFF or protective door monitoring.

Solid -Safety Relay (3TK284.)

Permanent, cyclical self test in sensor/actuator circuit
Sensor leads up to 200m
1 & 2 Channel Inputs
Versions for Stop Category 0 (immediate shutdown, no time delay)
Versions for Stop Category 1 (controlled shutdown, adjustable time delayed)
Expandable and Cascading
Autostart and Manual Start
Control Supply Voltages - 24 VDC
Compact housing widths of 22mm and 45mm
Certified up to Category 3 & 4 acc. to EN954-1
Certified up to SIL 2 & 3 acc. to IEC 61508

Solid-State Safety Relay with Dual Auxiliary Relays (3TK285.)

With these devices, solid-state safety combinations are connected with 3RH control relays. This combination is supplied as a complete self contained unit, fully wired up and tested for snapping on to a standard DIN rail. This combines the advantages of a solid-state safety relay and those of control relays with positive-driven contacts as a single device. It has been certified by the appropriate authorities as a complete unit.

Same rich features as the above 3TK284. with the addition of the following

Integrated redundant dual auxiliary relays of the modular SIRIUS 3RH Series
Wired and tested as a complete unit
Control Supply Voltages - 24 VDC, 115 VAC, 230 VAC
Housing width of 90mm
Certified up to Category 3 & 4 acc. to EN954-1
Certified up to SIL 2 & 3 acc. to IEC 61508