What the SICK UE45-3S13D330 Safety Relay Delivers

The SICK UE45-3S13D330 is a safety relay from the UE45-3S1 series, designed for safety brake and time-delayed stop applications. It monitors safety switches and emergency stop pushbuttons, and its enabling current paths achieve SILCL 3 (EN 62061) and PL e (EN ISO 13849). For oil and gas operations, this relay is built for demanding environments where a dependable safety stop protects both people and mission-critical equipment.

From a cost perspective, every unplanned trip or component failure carries a price. This unit addresses this with a 20-year mission time (TM, EN ISO 13849) and relay contacts rated for 5 × 10⁶ mechanical switching cycles. These figures help maintenance planners reduce replacement frequency and the labor cost that comes with it.

Key Features and Technical Specifications

• Supply voltage (A1, A2): 24 V DC (20.4 V DC ... 26.4 V DC), PELV or SELV.
• Power consumption: 2.6 W (DC), with a disclosed maximum of 3.1 W.
• Operating temperature: −25 °C ... +55 °C, suitable for outdoor and unheated enclosures.
• Safety integrity: SILCL 3 for enabling paths 13/14 and 23/24; SILCL 2 for time-delayed path 37/38.
• Performance level: PL e for enabling paths; PL d for time contacts.
• Off-delay time: adjustable from 1.5 s to 30 s, covering a range of braking profiles.
• Enabling current paths: 2 N/O contacts (category 4) plus 1 off-delayed N/O and 1 on-delayed N/O (category 3).
• Current loading: 10 mA ... 6 A per enabling path; 12 A total across all contacts.
• Mechanical life: 5 × 10⁶ switching cycles; electrical life 2 × 10⁶ cycles.
• Protection rating: IP40 housing, IP20 terminals (EN 60529).

The wide 24 V DC working range tolerates the voltage sag common on offshore and remote power systems. Meanwhile, the 2.6 W power draw keeps heat load low inside sealed panels, which supports longer component life and lower cabinet cooling cost.

How the Relay Supports Circuit Breaker Panel Replacement Projects

When teams plan a circuit breaker panel replacement, the safety relay is often the component that ties the new panel to existing emergency stop and guard circuits. This unit accepts 24 V DC control voltage and provides positively driven, gold-flashed silver alloy contacts. This makes it a practical choice when existing wiring must be reused without a full re-engineering effort.

For circuit breaker replacement industrial work, the relay's 15 A circuit breaker recommendation on the nameplate simplifies upstream protection selection. In addition, the 300 V AC rated insulation voltage and 4 kV impulse withstand rating support integration into distribution panels that feed motor control centers. A single relay that covers both safety and switching duties can reduce the number of separate components and the panel space they occupy.

Installation and Commissioning Guidance

Mount the relay on a standard DIN rail inside an enclosure that respects the −25 °C ... +55 °C operating range. Connect the 24 V DC supply to terminals A1 and A2, and observe the PELV or SELV requirement. Terminal assignments follow the official operating instructions: S11/S12 for safety input 1/2, S21/S22 for input circuit 2 and cross-circuit detection, and S31/S32 for external device monitoring. The reset terminals S33/S34/S35 support closing, opening, or automatic reset, with reset times of ≤30 ms manual and ≤600 ms automatic.

Use conductors from 0.14 mm² to 2.5 mm² and tighten terminals to 0.5 N·m ... 0.6 N·m. The delay adjustment path on terminals 24-34 sets the off-delay between 1.5 s and 30 s. Because the relay has no galvanic separation between A1/A2 and S11/S21, verify the supply architecture before wiring. A correct first-time installation avoids rework cost and shortens commissioning time.

Maintenance and Long-Term Reliability

Schedule periodic inspections of terminal torque, contact condition, and enclosure sealing. The IP40 housing and IP20 terminals suit clean control rooms but require protection from dust and washdown in harsh areas. Shock resistance of 15 g (11 ms) and vibration resistance of 10 Hz ... 55 Hz at 0.5 mm help the relay tolerate the vibration found on skids and compressor packages.

From a cost standpoint, the 20-year mission time and 5 × 10⁶ mechanical cycles mean the relay can outlast several maintenance cycles of surrounding equipment. Replacing a failed safety relay during a shutdown can cost far more than the part itself, so long service life directly supports uptime and budget predictability.

Lifecycle Status and Sourcing

SICK has announced end of sales for this model and names the RLY3-TIME100 as successor. Datasheet 6024914 and operating instructions 8009662 remain available for reference. For projects that still specify This unit, PetroPartsOnline can confirm current availability. Contact PetroPartsOnline for parts suited to your application's requirements.

Frequently Asked Questions

What is the supply voltage of the SICK unit?

The SICK unit operates on 24 V DC with a working range of 20.4 V DC to 26.4 V DC, using a PELV or SELV supply. Power consumption is 2.6 W, with a disclosed maximum of 3.1 W.

What off-delay range does this safety relay offer?

The off-delay is adjustable from 1.5 s to 30 s via the delay adjustment path on terminals 24-34. This range covers time-delayed stop applications such as safety brakes.

Can This unit be used in circuit breaker panel replacement projects?

Yes. The relay's 24 V DC control voltage, 15 A circuit breaker recommendation, and 300 V AC rated insulation voltage make it suitable for integration into replacement panels. Its positively driven contacts support safety circuit continuity during the transition.

What are the operating temperature limits?

The operating temperature range is −25 °C ... +55 °C, and the storage range is −25 °C ... +75 °C. These limits suit many outdoor and unheated enclosure applications in oil and gas facilities.

Is a successor model available?

SICK lists the RLY3-TIME100 as the successor to This unit. Please verify current lifecycle status and availability with PetroPartsOnline before ordering.

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