SRB324LT 24V

Product features

Optional: Short-circuit recognition, Manual reset with edge detection in fail-safe circuit, Automatic reset function
Suitable for the signal processing of outputs with contact sensors
Suitable for signal processing of outputs connected to potentials (AOPDs), e.g. safety light grids/curtains
3 safety contacts, STOP 0;2 safety contacts, STOP 1 (adjustable 1 … 30 s)
3 Signalling outputs, 1 Auxiliary contact

Ordering data

Note (Delivery capacity)Not available!

Product type descriptionSRB324LT 24V

Article number (order number)101204855

eCl@ss number, version 12.027-37-18-19

eCl@ss number, version 11.027-37-18-19

eCl@ss number, version 9.027-37-18-19

ETIM number, version 7.0EC001449

ETIM number, version 6.0EC001449

Approvals - Standards

CertificatescULusTÜV

General data

StandardsEN IEC 60204-1EN IEC 60947-1EN IEC 60947-5-1EN IEC 60947-5-3EN IEC 60947-5-5EN IEC 61508EN IEC 62061EN ISO 13849-1

Climatic stressEN 60068-2-78

Housing materialGlass-fibre reinforced thermoplastic, ventilated

Gross weight480g

General data - Features

Electronic FuseYes

Wire breakage detection Yes

Cross-circuit detectionYes

Removable TerminalsYes

Start inputYes

Feedback circuit Yes

Automatic reset functionYes

Reset edge detectionYes

Earth connection detectionYes

Integral system diagnostics, statusYes

Number of auxiliary contacts1

Number of LEDs6

Number of normally closed (NC)2

Number of undelayed semi-conductor outputs with signaling function3

Number of safety contacts5

Number of signalling outputs3

Safety classification

StandardsEN IEC 60947-5-1EN IEC 61508

Stop-Category01

Safety classification - Relay outputs

Performance Level, stop 0, up toe

Performance Level, stop 1, up tod

Category, Stop 04

Category, Stop 13

Diagnostic Coverage (DC) Level, Stop 0≥ 99%

Diagnostic Coverage (DC) Level, Stop 1> 60%

PFH value, Stop 02.00 x 10⁻⁸/h

PFH value, Stop 12.00 x 10⁻⁷/h

Safety Integrity Level (SIL), Stop 0, suitable for applications in3

Safety Integrity Level (SIL), Stop 1, suitable for applications in2

Mission time20Year(s)

Common Cause Failure (CCF), minimum65

Mechanical data

Mechanical lifetime, minimum10,000,000Operations

MountingSnaps onto standard DIN rail to EN 60715

Mechanical data - Connection technique

Terminal designationsIEC/EN 60947-1

Cable section, minimum0.25 mm²

Cable section, maximum2.5 mm²

Tightening torque of Clips0.6Nm

Allowed type of cableflexiblesolid single-wire

Terminal (mechanical)Screw terminals

Mechanical data - Dimensions

Width45mm

Height100mm

Depth121mm

Ambient conditions

IP Degree of protection of the enclosureIP40

IP Degree of protection of the installation spaceIP54

IP Degree of protection of clips or terminalsIP20

Ambient temperature-25 ... +60 °C

Storage and transport temperature-40 ... +85 °C

Resistance to vibrations10 ... 55 Hz, Amplitude 0.35 mm

Restistance to shock10 g / 11 ms

Ambient conditions - Insulation values

Rated impulse withstand voltage U_imp4kV

Overvoltage categoryIII

Degree of pollution2

Electrical data

Frequency range50Hz60Hz

Operating voltage24 VAC -15 % / +10 %
24 VDC -15 % / +20 %

Ripple voltage10%

Rated operating voltage24VAC

Rated operating voltage24VDC

Rated AC voltage for controls, 50 Hz, minimum20.4VAC

Rated control voltage at AC 50 Hz, maximum26.4VAC

Rated AC voltage for controls, 60 Hz, minimum20.4VAC

Rated control voltage at AC 60 Hz, maximum26.4VAC

Rated AC voltage for controls at DC minimum20.4VDC

Rated control voltage at DC, maximum28.8VDC

Electrical power consumption3.2W

Electrical power consumption7.1VA

Contact resistance, maximum0.1Ω

Note (Contact resistance)in new state

Drop-out delay in case of power failure, typically80ms

Drop-out delay in case of emergency, typically30ms

Drop-out delay in case of "emergency stop", maximum36ms

Pull-in delay at automatic start, maximum, typically250ms

Pull-in delay at RESET, typically20ms

Material of the contacts, electricalAgSn0, Ag-Ni, self-cleaning, positive drive

Electrical data - Digital inputs

Conduction resistance, maximum40Ω

Electrical data - Electromagnetic compatibility (EMC)

EMC ratingEMC-Directive

Status indication

Indicated operating statesInternal operating voltage U_iPosition relay K1Position relay K2Position relay K3

Other data

Note (applications)Emergency-Stop buttonGuard systemPull-wire emergency stop switchesSafety light curtainSafety sensor

Note

Note (General)Inductive loads (e.g. contactors, relays, etc.) are to be suppressed by means of a suitable circuit.

Wiring example

Note (Wiring diagram)(H2) = Feedback circuit2 channel control shown for a guard-door monitor with two contacts, of which at least one contact has positive break, with external reset button (R).Relay outputs: Suitable for 2 channel control, for increase in capacity or number of contacts by means of contactors or relays with positive-guided contacts.The control recognises cross-short, cable break and earth leakages in the monitoring circuit.The wiring diagram is shown with guard doors closed and in de-energised condition.

The details and data referred to have been carefully checked. Images may diverge from original. Further technical data can be found in the manual. Technical amendments and errors possible.

Generated on: 08/05/2026, 22:27