# Safety Relay, ReLy Series, PL e, SIL 3, 24 VDC, 6 mA, Spring

![Product image](https://novapart.co/image/farnell:4414554/)

**URL**: https://novapart.co/products/RLY3-EMSS300/safety-relay-rely-series-pl-e-sil-3-24-vdc-6-ma
**SKU**: RLY3-EMSS300
**Manufacturer**: SICK
**Category**: Switches & Relays || Relays || Safety Relays
**Price**: €160.0200
**Stock**: 10+
**Lead Time**: 43 days (indicative)

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (04-Feb-2026) |
| Product Range | ReLy Series |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:4414554/)

RLY3-EMSS300 ReLy 

**SAFETY RELAYS** 

**RLY3-EMSS300 | ReLy** SAFETY RELAYS 

Ordering information **Type Part no.** RLY3-EMSS300 1099973 Other models and accessories www.sick.com/ReLy t ~~SS~~ Illustration may differ 

Detailed technical data 

## Features 

|**Applications**|Evaluation unit|
|---|---|
|**Compatible sensor types**|Safety sensors with potential-free outputs|



## Safety-related parameters 

|**Safety integrity level**|SIL 3 (IEC 61508)|
|---|---|
|**Category**|Category 4 (ISO 13849-1)|
|**Performance level**|PL e (ISO 13849-1)|
|**PFHD (mean probability of a dangerous fail-**|1.0 x 10-9|
|**ure per hour)**||
|**TM (mission time)**|20 years (ISO 13849-1)|
|**Stop category**|0 (IEC 60204-1)|



## Functions 

|**Sensor monitoring**|Discrepancy monitoring|
|---|---|
||Cross-circuit detection|
|**Restart interlock**|✔|
|**Reset**|Automatic|
||Manual|
|**External device monitoring (EDM)**|✔|



## Interfaces 

|**Connection type**|Front connector with spring terminals|
|---|---|
|**Inputs**|2 safety inputs<br>1 input for reset pushbutton or external device monitoring (EDM)|
|**Outputs**|3 enabling current paths (safe)<br>2 application diagnostic outputs (not safe)<br>3 test pulse outputs (not safe)|
|**Display elements**|LEDs|
|**Configuration method**|Hard wired|



**Product data sheet | 2024-03-01 02:11:23 Subject to change without notice** 

**2 SENS:CONTROL - SAFE CONTROL SOLUTIONS | SICK** 

**RLY3-EMSS300 | ReLy** SAFETY RELAYS 

## Electrical data 

## Operating data 

|**Voltage supply**|PELV or SELV|
|---|---|
|**Supply voltage VS**|24 V DC (16.8 V ... 30 V)|
|**Residual ripple**|≤ 2.4 V|
|**Power consumption**|≤ 2.5 W (DC)|



## Safety inputs 

|**Number**|2|
|---|---|
|**Input voltage**||
|HIGH|24 V DC (11 V ... 30 V)|
|LOW|0 V DC (–3 V ... 5 V)|
|**Input current**|4 mA ... 6 mA|
|**Activation time tolerance between the two**<br>**start buttons**|≤ 3 s|



Reset pushbutton or external device monitoring (EDM) input 

|**Number**|1|
|---|---|
|**Input voltage**||
|HIGH|24 V DC (11 V ... 30 V)|
|LOW|0 V DC (–3 V ... 5 V)|
|**Input current**|4 mA ... 6 mA|



## Enabling current paths 

|**Response time**|12 ms|
|---|---|
|**Number**|3|
|**Type of output**|N/O contacts, positively guided|
|**Contact material**|Silver alloy, gold flashed|
|**Switching voltage**|10 V AC ... 230 V AC<br>10 V DC ... 230 V DC|
|**Switching current**|10 mA ... 6 A|
|**Total current**|12 A|
|**Mechanical life**|1 x 107switching cycles|
|**Overvoltage category**|III (EN 60664-1)|
|**Rated impulse withstand voltage Uimp**|6 kV (EN 60664-1)|



Application diagnostic outputs 

|**Number**|2|
|---|---|
|**Type of output**|Push-pull semiconductor output, short-circuit protected|
|**Output voltage**||
|HIGH|≥ Vs– 3 V|
|LOW|≤ 3 V|
|**Input current (NPN)**|≤ 15 mA|
|**Output current (PNP)**|≤ 120 mA|
|Testpulse outputs||
|**Number**|3|



**2024-03-01 02:11:23 | Product data sheet Subject to change without notice** 

**SENS:CONTROL - SAFE CONTROL SOLUTIONS | SICK** 

**3** 

**RLY3-EMSS300 | ReLy** SAFETY RELAYS 

|**Type of output**|PNP semiconductors, short-circuit protected|
|---|---|
|**Output voltage**|≥ Vs– 3 V|
|**Test pulse width**|2 ms|
|**Test pulse interval**|40 ms|
|Mechanical data||
|**Dimensions (W x H x D)**|18 mm x 124.6 mm x 85.5 mm|
|**Weight**|150 g|
|Ambient data||
|**Enclosure rating**|IP20 (IEC 60529)|
|**Ambient operating temperature**|–25 °C ... +55 °C|
|**Storage temperature**|–25 °C ... +70 °C|
|**Air humidity**|≤ 95 %, Non-condensing|
|**Interference emission**|According to IEC 61000-6-4|
|**Interference resistance**|According to IEC 61326-3-1|
||According to IEC 61000-6-2|
||According to IEC 60947-5-1|
|Classifications||
|**eCl@ss 5.0**|27371990|
|**eCl@ss 5.1.4**|27371990|
|**eCl@ss 6.0**|27371819|
|**eCl@ss 6.2**|27371819|
|**eCl@ss 7.0**|27371819|
|**eCl@ss 8.0**|27371819|
|**eCl@ss 8.1**|27371819|
|**eCl@ss 9.0**|27371819|
|**eCl@ss 10.0**|27371819|
|**eCl@ss 11.0**|27371819|
|**eCl@ss 12.0**|27371819|
|**ETIM 5.0**|EC001449|
|**ETIM 6.0**|EC001449|
|**ETIM 7.0**|EC001449|
|**ETIM 8.0**|EC001449|
|**UNSPSC 16.0901**|41113704|



## Mechanical data 

## Ambient data 

## Classifications 

**4** 

**Product data sheet | 2024-03-01 02:11:23 Subject to change without notice** 

**SENS:CONTROL - SAFE CONTROL SOLUTIONS | SICK** 

**RLY3-EMSS300 | ReLy** SAFETY RELAYS 

## Dimensional drawing (Dimensions in mm (inch)) 

## EMSS3, LOOP1, MULT1, OSSD3 

**==> picture [222 x 220] intentionally omitted <==**

**----- Start of picture text -----**<br>
20.1<br>(0.79) 87.7 (3.45)<br>18 85.5 (3.37)<br>(0.79)<br>78.7 (3.1)<br>(2.54)<br>)<br>64.4<br>(4.75) (4.91) 5.05(<br>38.<br>120.7  124.6  12<br>**----- End of picture text -----**<br>


**2024-03-01 02:11:23 | Product data sheet Subject to change without notice** 

**SENS:CONTROL - SAFE CONTROL SOLUTIONS | SICK** 

**5** 

## SICK At A GlAnCe 

SICK is one of the leading manufacturers of intelligent sensors and sensor solutions for industrial applications. A unique range of products and services creates the perfect basis for controlling processes securely and efficiently, protecting individuals from accidents and preventing damage to the environment. 

We have extensive experience in a wide range of industries and understand their processes and requirements. With intelligent sensors, we can deliver exactly what our customers need. In application centers in Europe, Asia and North America, system solutions are tested and optimized in accordance with customer specifications. All this makes us a reliable supplier and development partner. 

Comprehensive services complete our offering: SICK lifetime Services provide support throughout the machine life cycle and ensure safety and productivity. 

For us, that is “Sensor Intelligence.” 

## WOrldWIde preSenCe: 

Contacts and other locations www.sick.com 

SICK AG | Waldkirch | Germany | www.sick.com 



## Links

- [View this product on Novapart](https://novapart.co/products/RLY3-EMSS300/safety-relay-rely-series-pl-e-sil-3-24-vdc-6-ma)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/sick/rly3-emss300/safety-relays-rely/dp/4414554)
---

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