IS4-L: Latching Relay with Intrinsically Safe Inputs
• Latching Logic
• Pump Down or Pump Up
• 4 Channels
• Shorted Input Sensing
• Open Input Sensing
• Contact or Probe Inputs
• Output and Input LED
Indication
Operation
Four Channel Latching Relay
Supply voltage must be applied to the IS4-L relay during operation. The latching logic is set up for a pump down operation. (Pump up is available too.) When IS input #1 closes its LED changes and #1 output contact closes. When IS input #2 closes, output contact #2 closes, latches in and starts the first pump. When IS inputs #3 and #4 close, Output contacts #3 and #4 latch closed, respectively. All output contacts remain closed, even if their inputs open, until input #1 opens, and all output contacts open, indicating that the system has pumped down. LED indicators will be: Red - When the IS input is open or high Green - When both the IS input & output contact are closed Amber - Latch Logic - IS input open & Output closed Flashes - During transition delay A green LED indicates when supply voltage has been applied to the IS4-L.
Specifications
Electrical
Supply Voltage: 24, 120 & 240VAC ±10%
Power: 2VA
Inputs: Switch Closure or Probe (Conductivity)
Input Sensitivity: 3K - 1.5MΩ
Pick-up & Drop-out Delays: 1 second
Max. Open Circuit Voltage: 5 volts AC
Max. Source Current: 0.1 milliamp AC
Output Rating @ 25°C:
5 Amps or 100VA per contact
10 Amps total
250VAC maximum contact rating
10,000,000 Mechanical Cycles
Physical
Mounting: Din Rail mount
Termination: Touch safe screw terminals, with lift mechanism,
#12 AWG max.
Weight: 10 Oz.
Ambient Temperatures
Operating: 0°C to 50°C
Storage: -40°C to 85°C