Press start
Both hand controls must be operated before the stroke is released, keeping hands outside the tool.
Safety Relay · Two-Hand Start
LE-S3013 Safety Relay Module (Two-Hand Start)
A two-hand start safety relay for press and machine-tool control: both hand controls must be actuated within the synchronous window before the output closes.
Model LE-S3013 · Brand LE Raun · Category: Safety Relay Modules
FunctionTwo-hand start
Safety category4 (EN ISO 13849-1)
Safety level3 (IEC 61508/62061)
Durability≥5,000,000 cycles
Overview
The LE-S3013 is the two-hand start module in the LE Raun safety relay family. Output closure requires both hand controls to be operated, which keeps the operator's hands occupied and outside the danger zone during the start of the cycle.Safety data: category 4 to EN ISO 13849-1 and safety level 3 to IEC 61508 / IEC 62061, conforming to EN ISO 13849-1, EN ISO 13849-2, EN 62061, IEC 61508 and IEC 62061. Supply 24 V DC with ≤2 W module consumption; power supply and output protected by a built-in resettable fuse; minimum permissible load 10 V DC / 10 mA; rated insulation voltage 300 V AC; vibration resistance 10–55 Hz at 0.35 mm single amplitude; IP40 (terminals IP20); ≥5,000,000 mechanical cycles; −10 to +55 °C, non-condensing.
Application scenarios
Press brake bending
Two-hand start for the bending cycle on a hydraulic press brake.
Assembly presses
Prevents one-handed operation of a small press.
Riveting and staking machines
Two-hand initiation on bench-top machines.
Machine tools with manual load
Forces both hands away from the tool during clamp and start.
Industries
- Metal forming
- Automotive
- Appliances
- Hardware
Technical specifications
| Model | LE-S3013 |
|---|---|
| Start-up mode | Two-hand start |
| 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 two-hand start module monitors that both buttons go down together — the 23 mm body is the same, the difference is the input wiring and the 0.5 s window the logic enforces.
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
What is a two-hand start relay for?
It forces the operator to use both hands on two separate controls, keeping them out of the hazard zone while the machine cycle starts — a long-standing requirement on press and press-brake work.
Can it also take light curtain input?
The module family is intended for safety light curtain input and performs dual-signal monitoring for emergency stop and safety switches on machinery and machine tools. Confirm the exact input configuration for your application with our engineers.
What are the electrical ratings?
24 V DC supply, ≤2 W module consumption, built-in resettable fuse, 10 V DC / 10 mA minimum permissible load, 300 V AC rated insulation voltage, IP40 (terminals IP20), −20 to 60 °C non-icing.
Need a quotation for LE-S3013 Safety?
Send your application details or the guard opening dimensions and we will specify the right model and configuration for your machine.