Detailed description - Time delay relay ERV-08M (0,1 s - 100 h), Un: 12-230 V AC/DC

The ERV-08M time relay is a universal delay relay designed to control delayed switch-on after supply voltage is applied. It offers a wide time range from 0.1 seconds to 100 hours, universal 12-230 V AC/DC power supply, simple operation and DIN rail mounting.

It is suitable for automation applications, controlling fans, motors, lighting, contactors and other appliances that require delayed start-up.

Main features

• Delayed NO contact start-up function when voltage is applied

• Wide time range: 0.1 s - 100 h

• Universal power supply: 12-230 V AC/DC (4 VA)

• 1× SPDT switching contact ( NO/NC), 5A/250VAC

• Two LED indicators:

  • ON (red) - power present

  • OUT (green) - output relay status

• Time setting by two rotary potentiometers

• DIN rail mounting 35 mm

• IP20 protection

• Compact dimensions: 91 × 18 × 65 mm

Controls and functions

LED indication

• ON (red) - relay is powered

• OUT (green, permanently lit) - output relay is energized (contact 2-3 connected)

• OUT (green, flashing) - countdown to switching is in progress

Time setting

The time relay allows you to create a precise delay using two potentiometers:

1. Potentiometer "t" (0.1 to 10)
   - fine adjustment in % of total range
   - 0.1 = 1%, 10 = 100%

2. Potentiometer "TS" - range selection:

   • A = 10 s

   • B = 100 s

   • C = 10 min

   • D = 100 min

   • E = 10 h

   • F = 100 h

The time change is activated the next time the power is connected.

Switching function

1) ON Delay - delayed switch-on (terminals 2-3, NO)

• When power is connected , the countdown of the set time starts

• After the time has elapsed, the Out relay (RLY) is activated - contact 2-3 (NO → COM) is switched on

2) OFF Delay via NC contact (terminals 2-1)

• Contact 2-1 (NC) is switched even without power supply

• When power is connected, the countdown starts

• After the time has elapsed, contacts 1-2 will open

Using

The ERV-08M timer relay is used for applications where a delayed on-load is required after an event occurs:

• The fan turns on only after the light is switched on (toilet, bathroom)

• Lighting in garage or hallway after door opening

• Gradual start-up of motors

• Delayed switching of contactors

• Sequential switching of multiple circuits

• Delayed appliance starts

Time counting starts whenever power is applied to the relay.