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ISL: Latching Relay with Intrinsically Safe Outputs


• Two Inputs -

  Latching Function


• Compact Design


• Contact or Probe Input


• Built-in De-bounce



• Output and Input status



• Low Voltage Design for  

  12 or 24VAC/DC


• Din Mounting


• 12 or 24VDC Battery



Latching Relay 

The ISL has two independent outputs to the hazardous area and one (dry contact) relay output with a latching function. The outputs can be switches (float or pressure) or, when used with a conductive liquid, electrodes. Pump Down Operation: When output “B” is completed (contact closed or low resistance), 1 second later LED “B” lights but there is no change in the relay output contacts. and the dry output contact is energized. When output “A” is completed, LED “A” lights and the output relay is energized. When output “A” opens, there is no change in the output contact. When output “B” opens, the output relay is de-energized. Pump Up Operation: Use normally closed input devices and reverse the positions of “A” and “B” outputs.




Supply Voltage: 12 or 24 AC/DC ±10%

Power: 0.8 watts Inputs: Switch Closure or Probe

Input Sensitivity: 10k - 100k Ω

Pick-up & Drop-out Delays: 1 second

Max. Open Circuit Voltage: 5.9 volts DC

Max. Source Current: 0.1 milliamps

Output Rating @ 25°C:

     5 Amps @ 125VAC

     5 Amps @ 30VDC or 250VAC

     20,000,000 Mechanical Cycles



Mounting: Din Rail mount

Termination: Touch safe screw terminals, with lift mechanism,

     #12 AWG max.

Weight: 10 Oz.


Ambient Temperatures

Operating: 0°C to 55°C

Storage: -40°C to 85°C


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