Leading Manufacturer of Safety Interlock Switches and Machine Guard Safety Switch Devices for Automation and Process Safety

Emergency Stop Device with LED 4-Pole Contacts in 316 Stainless Steel (ESL-SS-L)

IDEM’s Heavy Duty Emergency Stop Switches are designed to provide robust Emergency Stop protection for exposed conveyors or machines. The IP69K enclosure protection is maintained by a double seal gasket and anti-rust, stainless steel internal screws. The Bi-colour LED indicates switch status from a distance. 3NC + 1NO contact configuration recommended for bi-colour operation.


  • Body Material: Rugged 316 Grade Stainless Steel
  • Ingress Protection: IP69K
  • Contacts: 4NC, 3NC + 1NO or 2NC + 2NO
  • LED Voltage: 24Vdc, 110Vac, 230Vac
  • Conduits: 3 x M20 or ½” NPT
Part No. Part Description
232017A ESL-SS(L) M20 2NC 2NO LED 24v
232017B ESL-SS(L) M20 2NC 2NO LED 110V
232017C ESL-SS(L) M20 2NC 2NO LED 230V
232018-AS ESL-SS(L) ½NPT 2NC 2NO Steady LED 24v
232018-BS ESL-SS(L) ½NPT 2NC 2NO Steady LED 110V
232018A ESL-SS(L) ½NPT 2NC 2NO LED 24v
232018B ESL-SS(L) ½NPT 2NC 2NO LED 110V
232018C ESL-SS(L) ½NPT 2NC 2NO LED 230V
232019-AS ESL-SS(L) M20 3NC 1NO Steady LED 24V
232019A ESL-SS(L) M20 3NC 1NO LED 24V
232019B ESL-SS(L) M20 3NC 1NO LED 110V
232019C ESL-SS(L) M20 3NC 1NO LED 230V
232020-AS ESL-SS(L) ½NPT 3NC 1NO Steady LED 24v
232020-BS ESL-SS(L) ½NPT 3NC 1NO Steady LED 110V
232020A ESL-SS(L) ½NPT 3NC 1NO LED 24v
232020B ESL-SS(L) ½NPT 3NC 1NO LED 110V
232020C ESL-SS(L) ½NPT 3NC 1NO LED 230V
232021A ESL-SS(L) M20 4NC LED 24V
232021B ESL-SS(L) M20 4NC LED 110V
232021C ESL-SS(L) M20 4NC LED 230V
232022A ESL-SS(L) ½NPT 4NC LED 24V
232022B ESL-SS(L) ½NPT 4NC LED 110V
232022C ESL-SS(L) ½NPT 4NC LED 230V

Important Note
When required by local regulations, please affix the supplied yellow emergency stop sticker.

Technical Data
ApprovalscULus
TechnologyEmergency Stop, Twist-To-Release
Housing Material316 Grade Stainless Steel
Button MaterialUV Resistant Polyester
IndicationSee data sheet or technical drawings tab
Safety Contact typeIEC 60947-5-1 Double break Type Zb
TerminationClamp up to 2.5 sq. mm conductors
RatingUtilisation Category : AC15
Operational RatingAC15 A300 240V. 3A /120V 6A. ac
Thermal Current (Ith)10A
Rated Insulation Voltage (Ui)500V
Withstand Voltage (Uimp)2500V.
Short Circuit Overload ProtectionFuse Externally 10A. (FF)
Operating Temperature-25 ... +80 °C
Enclosure ProtectionIP67, IP69K (NEMA 6)

Safety Classification and Reliability Data
Mechanical Reliability B10d1.5 x 10 6 operations at 100mA load
ISO 13849-1up to PLe depending upon system architecture
EN 62061up to SIL3 depending upon system architecture
Safety Data - Annual Usage8 cycles per hour / 24 hours per day / 365 days MTTFd 214 years

INFORMATION WITH REGARD TO UL508
Type 1 Enclosure Contact Blocks A300 230V/3A 120V/6A Wire range: 16AWG – 12AWG Stranded Copper Conductors Terminal Torque 7lb/in (0.8Nm) 24V LED (if fitted) powered by LVLC or Class 2 only.