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

External Mount Trapped Key Control Isolation Switch with Solenoid Controlled Key Release (SS-ISB4-SR)

The SS-ISB4-SR is used for isolating an electrical control circuit. The key is solenoid controlled and requires an unlock sign before the key can be turned to the OFF position, allowing it to be removed and transferred to the next stage in the Trapped Key System. The SS-ISB4-SR is housed in a robust 316 grade stainless steel enclosure and tested to IP69K for washdown environments.

  • 316 Grade Stainless Steel
  • Ingress Protection up to IP69K
  • 2NC + 2NO, 3NC + 1NO Monitoring Contact Blocks
  • Indication via LED 1 Solenoid Status Indication / LED 2 is an Optional Auxiliary Indication Circuit
  • Connection via 3 x M20

Part NumberDescriptionConfigurationMaterialKey Included
SS-ISB4-SR-22Control Switch Solenoid Release, 2NC 2NO (M20)2 N/C + 2 N/O316 Grade Stainless SteelNO
SS-ISB4-SR-31Control Switch Solenoid Release, 2NC 2NO (M20)3 N/C + 1 N/O316 Grade Stainless SteelNO

Key sold separately
Optional integral request button available

Technical Data
Enclosure Material316 Grade Stainless Steel
Enclosure protectionIP67, IP69K (NEMA 6)
Operating Temperature-20 ... +40 °C
Solenoid Voltage24V.dc (+/- 10%)
LED2 voltage24V.dc (+/- 10%)
Mechanical Life (B10d)1,000,000 cycles
Changeover pushbutton (if fitted)24V.dc / 400mA