QF-RD21 5V Power-off Delay Disconnect Relay Module Timer Delay Switch Module

$18.99
  Availability: In Stock
  Shipping: Free Airmail 
  Estimated Delivery: 
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    Before we can ship your order, we prepare your products, do strict quality-control tests and carefully package the items. The time it takes to prepare your items for shipping is separate from the delivery time. It usually takes 1-3 business days to ship out .

    Shipping Methods

    You can choose the preferred shipping method on the cart page during the checkout process. We offers 3 international shipping methods:

    1. Airmail – Free untracked economy shipping via national postal services (HK Post, Singapore Post, China Post, PostNL, Swiss Post, Sweden Post, USPS, Royal Mail e.t.c.)
    2. Airmail Registered – Tracked shipping via national postal services (HK Post, Singapore Post, China Post, PostNL, Swiss Post, Sweden Post, USPS, Royal Mail e.t.c.)
    3. Expedited Shipping – Express shipping with courier delivery (DHL, UPS, FedEx, TNT)

    Delivery Time

    Airmail and Airmail Registered Area Estimated Delivery Time
    United States, Canada 7-25 business days
    Australia, New Zealand, Singapore, United Arab Emirates 10-25 business days
    United Kingdom, France, Spain, Germany, Netherlands, Japan, Belgium, Denmark, Finland, Ireland, Norway, Portugal, Sweden, Switzerland 10-25 business days
    Italy, Brazil, Russia, South Africa 10-45 business days
    Other countries 10-35 business days
    Expedited Shipping 3-10 business days to Worldwide

    Note: If you choose an expedited shipping, please remember to leave a valid contact number, this is required for expedited shipping’s courier delivery.

  •  Returns & Refund

    Last updated October 05, 2022

    Returns

    If you are not completely satisfied with your purchase for any reason, you may return it to us for a full refund within 15 days from delivery date. All returned items must be in new and unused condition, with all original tags and labels attached.

    Return Process

    To return an item, please email our customer service at sales@alexnld.com to obtain a Return Merchandise Authorization (RMA) number. After receiving a RMA number, place the item securely in its original packaging, and mail your return to the following address:

    Alex NLD
    Attn: Returns
    RMA #
    HaGiborim St 8
    Tiberias, 14388
    Israel

    Please note, you will be responsible for the return shipping charges. We strongly recommend that you use a trackable method to mail your return.

    All customers should contact us and obtain Return Merchandise Authorization (RMA) number before sending anything to us. We will not be responsible for returned item(s) without notifying us in advance.

    Refunds

    After receiving your return and inspecting the condition of your item, we will process your refund to the credit / debit card or PayPal account which was used to place the original order.

    Please allow at least seven (7) days from the receipt of your item to process your refund. Refunds may take 1-2 billing cycles to appear on your credit card statement, depending on your credit card company. We will notify you by email when your refund has been processed.

    Exceptions

    If an item is found damaged or defective on receipt, we kindly ask you to contact us within 15 days from the delivery date to arrange a refund or exchange without physical return of the item.

    Please provide us with following:

    1. Photos of the front and back sides of the packaging box;
    2. A photo, video or screenshot of the defective item or the defective part of the parcel.

    Our customer service team will communicate with you to arrange a refund or reshipment without physical return of the item.

    Warranty & Repair service

    If any of the items you have purchased from us is found defective within 1 year from receipt, you are entitled to a repair under warranty. Please kindly provide us with evidence photos or videos of the defective item. After providing such information to our Customer Service team  and the problem is acknowledged, you can send the items back to us for a repair.

    Note:  Please be aware, we do not cover the cost of the returns fees in  warranty & repair service.

    Order Cancellation

    If you want to cancel an order within 24 hours from confirmation of the payment, you will be entitled to a full refund. It is still possible to cancel an order after 24 hours, provided that it has not yet been shipped. If an order has been shipped, it’s impossible for us to cancel or modify it anymore. If you still want a refund, you required to return the item on it’s arrival.

    Questions

    If you have any questions concerning our return policy, please contact us at:

    +972 054-536-2888
    sales@alexnld.com

     


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Specifications:
 
Voltage: 5V DC (±1.5V)
Power consumption: <1.0W
Output: Passive output (ie dry contact), relay set of normally open + normally closed output. Do not exceed 10A at most.
Time range: (4 files, selected by switch)
First gear: range 0.2 seconds-30 seconds, accuracy: 0.1 seconds
Second gear: range 0.2 seconds – 300 seconds (5 minutes), accuracy: 0.3 seconds
Third gear: range 0.2 seconds-30 minutes, accuracy: 1.8 seconds
Four gears: range 0.2 seconds – 300 minutes (5 hours), accuracy: 18 seconds
Input: Voltage signal, above 1.5V is the effective signal, the current needs at least 0.1mA.
Dimensions: length 70mm * width 25mm * height 20mm
Screw hole: center distance 64.5, aperture 3.0mm
 
Wiring:
 
V+ module DC powered positive
GND The DC supply of the module is also the reference GND of the signal voltage.
IN signal voltage input, low level below 1V, high level above 1.5V, uncertain in the middle. Up to 30V
Normally open contact of the NO relay
Constant contact of NC relay
COM relay contact common
 
Instructions:
 
Time range setting:
– When the selector switch is placed in the 30 position, it means 0-30 adjustable
– When the selector switch is placed at position 300, it indicates that 0-300 is adjustable.
 
Adjustment of time value:
– Adjustable resistance rotates counterclockwise to the direction of the number to reduce the time, clockwise to the + direction increases the time
 
Time unit setting:
– When the selector switch is placed in the Sec position, the unit is: second
– When the selector switch is placed in the Min position, the unit is: minute
 
Example:
Request a delay of 50 minutes:
1. The range is placed at 300 position
2. The time unit is placed in the Min position.
3. Adjust the adjustable resistance to 50 position, adjust to 300, so adjust to 1/5 is 50.
Note: The potentiometer adjustment can also be quickly adjusted with the multimeter voltage file. For example, the range is 30, and it needs to be adjusted to 12, then the voltage can be adjusted to 2.
 
t=Ut/5*30=2.0V / 5.0V * 30 =12
 
Ut is the voltage measured by the multimeter, 30 is the range selected by the selector switch, and can also be selected to 300.
 
Applications:
 
Combined with the travel switch and the inductive switch:
1. Timeout automatically closes the door
2. Pipeline product flow monitoring
3. Current flow monitoring such as water flow
4. Other uses
 
Package Included:
 
1 x QF-RD21 5V Power-off Delay Disconnect Relay Module Timer Delay Switch





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