Duelco NST-3 safety relay 24VAC/24VDC 250V 6A 3x NO 1X NC

The NST-3 has 1x NC single channel input for use with gate interlocks and emergency stop buttons in lower risk applications.
The NST-3 has output monitoring that can accommodate an automatic / manual reset function. Automatic / manual reset can use a jumper or can be used to check operation of the contacts.
The NST-3 has 3x NO safety outputs and 1x NC auxiliary output. The safety outputs have independent and redundant internal contacts to help ensure the safety function. The auxiliary contact is a non-safety output intended to provide an external signal about the status of the safety outputs.

Features

• Design is based on the European Standard, EN 60204-1
• Category 2/3
• Single channel input
• Three N.O. safety outputs
• One N.C. auxiliary output
• 22.5 mm wide housing

Safety relay technical information:

• Status indicator:
  • Green LED
• Reset:
  • Auto / Manual or manual monitored
• Number of main contacts and type:
  • 3x NO (Normally open)
• Main contacts max current:
  • 6A
• Number of auxiliary contacts and type:
  • 1x NC (normally closed)
• Auxiliary contacts max current:
  • 6A
• Controlling voltage:
  • 24Vac / 24Vdc
• Contacts max operating voltage:
  • 250V
• Mounting:
  • DIN rail
• Safety relay width:
  • 22.5mm

Safety relays
Safety relays with positively driven contacts were the first components available for safe monitoring of sensors and actuators. They are optimally used if your machine or system requires few safety functions and logic operations to be implemented, such as for example:

• Emergency off / emergency stop
• Monitoring of moving safety equipment (for example safety door)
• Electro sensitive protective equipment
• Two-hand control devices up to type IIIC
• Speed monitoring

A safety relay for the safe monitoring of functions in machines and systems is based on relay technology with positively driven contacts according to EN 50205.

Positively driven contacts
In a safety device with integrated monitoring, the characteristic of positively driven operation is used for error detection. Dangerous errors, such as the welding of contacts, are thus reliably detected and a high level of safety is achieved.