Machine emergency stop
Monitors a dual-channel e-stop button and drops the output when either channel opens.
Safety Relay · Emergency Stop
LE-S3014 Safety Relay Module (Emergency Stop)
An emergency-stop safety relay module with dual-channel monitoring, category 4 to EN ISO 13849-1 and safety level 3 to IEC 61508 / IEC 62061. 24 V DC, ≤2 W,
Model LE-S3014 · Brand LE Raun · Category: Safety Relay Modules
FunctionEmergency stop
Safety category4 (EN ISO 13849-1)
Safety level3 (IEC 61508/62061)
Protection levelIP40 (terminals IP20)
Overview
The LE-S3014 is the emergency-stop module of the range: a dual-channel safety relay that monitors e-stop and safety-switch contacts and drops the output when either channel opens.It shares the family's safety data — category 4 to EN ISO 13849-1, safety level 3 to IEC 61508 / IEC 62061, conformity to EN ISO 13849-1, EN ISO 13849-2, EN 62061, IEC 61508 and IEC 62061 — and the same electrical platform: 24 V DC supply, ≤2 W module consumption, built-in resettable fuse, 10 V DC / 10 mA minimum load, 300 V AC rated insulation voltage, 10–55 Hz / 0.35 mm vibration resistance, IP40 (terminals IP20), ≥5,000,000 mechanical cycles and −10 to +55 °C operation, non-condensing.
Application scenarios
Line e-stop chains
One module per monitored group in a multi-station line.
Gate switch monitoring
Supervises safety door switches wired in series.
Light curtain input
Accepts the OSSD pair from a safety light curtain.
Cabinet safety circuits
Standard 24 V DC safety stage inside the control cabinet.
Industries
- General machinery
- Machine tools
- Automotive
- Food processing
Technical specifications
| Model | LE-S3014 |
|---|---|
| Start-up mode | Emergency stop |
| Compliant standards | EN ISO 13849-1 · EN 62061 · EN ISO 13849-2 · IEC 61508 · IEC 62061 |
| Corresponding safety category | SIL 3 / PL e (Cat. 4); SIL 2 / PL d (Cat. 3) on reduced configs |
| Safety level | 3 (IEC 61508 / IEC 62061) |
| Module power consumption | ≤2 W (at 24 V DC) |
| Power supply & output protection | Built-in power protection |
| Minimum permissible load | 10 V DC / 10 mA |
| Rated insulation voltage | 300 V AC (reinforced / double insulation) |
| Vibration resistance | 10–55 Hz, single amplitude 0.35 mm |
| Protection level | IP40 (terminals IP20) |
| Mechanical durability | ≥5,000,000 cycles |
| Operating ambient temperature | −10 to +55 °C (non-condensing) |
| Product applications | Suitable for safety light curtain input. Performs dual-signal monitoring for emergency stop and safety switches on machinery and machine tools. |
| Standards | EN ISO 13849-1:2015, EN ISO 13849-2:2012, EN 62061:2015 |
| Performance level | PLe / SIL 3, Category 4 architecture |
| Safety outputs | 3 NO contacts (13–14, 23–24, 33–34) |
| Signal output | 1 transistor output (41–42) |
| Contact rating | AC-15 3 A / 240 VAC, DC-13 1 A / 24 VDC |
| Conventional thermal current | 6 A |
| Contact material | AgSnO₂ with 2 µm Ag plating, silver-alloy contacts |
| Contact resistance | ≤100 mΩ |
| Electrical life | 100,000 operations |
| Mechanical life | ≥5,000,000 operations |
| Operating frequency | 0.5 Hz |
| Release time | ≤10 ms after power-off (status-LED delay excluded) |
| Rated impulse withstand | 2,500 V (1.2/50 µs) |
| Terminals | Removable blocks, 2 × 1.5 mm² solid or 2 × 1 mm² stranded |
| Mounting | 35 mm DIN rail |
| Indication | 3 green LEDs — power, channel 1, channel 2 |
Dimensions
| Item | Value |
|---|---|
| Height | 114.5 mm |
| Depth | 23 mm |
| Enclosure | IP40, DIN-rail module |
| Weight | approx. 230 g |
The e-stop module lands in the same 23 mm slot; it is the one that drops the safety output the instant any button in the chain breaks, so it is wired at the start of the safety bus.
Wiring & output
| Terminal | Function |
|---|---|
| S11 / S12 | Safety input, channel 1 — light curtain OSSD or first contact of a two-channel device |
| S21 / S22 | Safety input, channel 2 — second channel for dual-channel devices |
| 13–14 | Safety output 1, NO, closed when both channels are healthy |
| 23–24 | Safety output 2, NO |
| 33–34 | Safety output 3, NO |
| 41–42 | Transistor signal output for the PLC (state mirror) |
| SB1 / SB2 | Start / reset button, and two-hand control inputs on the two-hand module |
| KM1 / KM2 | External contactor feedback (EDM) — opens the enable path if a contactor welds |
How to specify
- 01
Count the safety outputs
Every module has three NO safety outputs and one transistor signal output. Two outputs normally go to the two contactors of the main circuit, the third can report to the PLC or drive a second axis.
- 02
Match the start mode to the risk assessment
Manual start needs a deliberate reset after the field is clear; automatic start re-enables as soon as the field is clear and is only allowed where the operator cannot stand inside the guarded area. The two-hand module additionally requires both buttons within 0.5 s.
- 03
Check the contact rating against the contactors
3 A / 240 VAC is enough for the coil of a 24 VDC contactor but not for a large AC coil — use an interposing contactor or a force-guided pair.
- 04
Wire the feedback loop
The EDM input must see the NC auxiliary contacts of both switching contactors, otherwise a welded contact will not be detected and the module cannot reach Category 4.
Why this series
Category 4 architecture
Corresponding safety category 4 to EN ISO 13849-1, with safety level 3 according to IEC 61508 / IEC 62061.
Protected output
Built-in resettable fuse protects the power supply and the output circuit — no replaceable fuse to stock.
DIN-rail module
A compact housing for standard cabinet mounting, rated IP40 (terminals IP20) for installation inside an enclosure.
Questions
How many e-stop circuits can it monitor?
The module performs dual-signal monitoring for emergency stop and safety switches on machinery and machine tools. For multi-circuit cabinets, one module per monitored group is the usual arrangement — please confirm the configuration with our engineers.
Does it work with a light curtain?
Yes — the family is intended for safety light curtain input as well as e-stop and safety-switch monitoring.
What are the electrical ratings?
24 V DC, ≤2 W module consumption, built-in resettable fuse on the power supply and output, 10 V DC / 10 mA minimum permissible load, 300 V AC rated insulation voltage, IP40 (terminals IP20), −10 to +55 °C non-condensing.
Need a quotation for LE-S3014 Safety?
Send your application details or the guard opening dimensions and we will specify the right model and configuration for your machine.