Comelit 1122/A DIN rail mountable relay 12/24VDC, SPDT 277VAC 10A

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

Relay technical information:

• Nominal operating voltage:
  • 12/24VDC
• Operating current:
  • Not stated
• Output form:
  • SPDT (Single pole double throw)
• Operation indicator:
  • There is none
• Max contact voltage:
  • AC:
    • 277V
• Contact max current:
  • 10A
• Contact material:
  • Not stated
• Operate (set) time:
  • Not stated
• Operate (reset) time:
  • Not stated
• Operating frequency:
  • Not stated
• Dielectric strength:
  • Not stated
• Vibration resistance:
  • Not stated
• Shock resistance:
  • Not stated
• Operating temperature:
  • Not stated
• Ambient humidity:
  • Not stated
• Input protection:
  • There is none
• Suitable connecting sockets (relay bases):
  • 35mm DIN-rail mounting