Omron G7S-4A2B safety relay with positive force-guided contacts 24VDC, 4x NO 2x NC 240VAC 6A

Relays are used as an interface between different signal levels or to isolate one signal from another. Relay is similar in function to a contactor. The modules are often used to enable the outputs of PLC's to control higher voltage and current loads. For example, a load voltage can be even 250 V and it will be still completely galvanically isolated from the PLC.

Relays have the following qualities:

• Cheap
• Small size, but compared to size can still connect large currents and voltages
• Simple construction
• Does not interfere with the controlled signal besides for the contacts resistive effect (in practice no effect on anything)
• Can drive alternating current and directed current loads

Some examples of relay applications:

• Control of AC / DC loads
• Application with electrical isolation
• To convert an NPN output into a PNP output
• To convert an PNP output into a NPN output

Omron G7S-4A2B compact relay technical information:

• Nominal operating voltage:
  • 24VDC
• Operating current:
  • 30mA
• Output form:
  • 4PDT (4-pole double throw)
• Operation indicator:
  • No indicator
• Max contact voltage:
  • AC:
    • 250V
  • DC:
    • 24V
• Contact max current:
  • 6A
• Contact material:
  • AgAu
• Operate (set) time:
  • 50ms max
• Operate (reset) time:
  • 50ms max
• Operating frequency:
  • 18000x in a hour
  • 1800x in a hour with nominal load nimelliskuormal
• Dielectric strength:
  • Coil / contacts:
    • 2500V
  • Contacts / contacts:
    • 1500V
• Vibration resistance:
  • 10...55Hz 1mm double amplitude
• Shock resistance:
  • 1000m/s² (approx. 100G)
• Operating temperature:
  • -10...70°C
• Ambient humidity:
  • 35...85%RH (non condensing)
• Input protection:
  • Nothing
• Suitable connecting sockets (relay bases):
  • P7S-14F
  • P7S-14A
  • P7S-14P
  • P7S-A10

Relay socket which is featured in pictures is there for illustrative purposes only. Relay bases are sold separately.