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Description
SR2B121BDMain Range of product Zelio Logic Product or component type Compact smart relay Complementary Local display With Number or control scheme lines 0240 with ladder programming 0500 with FBD programming Cycle time 690 ms Backup time 10 years at 25 C Clock drift 12 min year at 055 C 6 s month at 25 C Checks Program memory on each power up [Us] rated supply voltage 24 V DC Supply voltage limits 19. 230 V Maximum supply current 100 mA (without extension)
Main
| Range of product | Zelio Logic |
| Product or component type | Compact smart relay |
Complementary
| Local display | With |
| Number or control scheme lines | 0…240 with ladder programming 0…500 with FBD programming |
| Cycle time | 6…90 ms |
| Backup time | 10 years at 25 °C |
| Clock drift | 12 min/year at 0…55 °C 6 s/month at 25 °C |
| Checks | Program memory on each power up |
| [Us] rated supply voltage | 24 V DC |
| Supply voltage limits | 19.2…30 V |
| Maximum supply current | 100 mA (without extension) |
| Power dissipation in W | 3 W without extension |
| Reverse polarity protection | With |
| Discrete input number | 8 conforming to EN/IEC 61131-2 type 1 |
| Discrete input type | Resistive |
| Discrete input voltage | 24 V DC |
| Discrete input current | 4 mA |
| Counting frequency | 1 kHz for discrete input |
| Voltage state 1 guaranteed | >= 15 V for I1...IA and IH...IR discrete input circuit >= 15 V for IB...IG used as discrete input circuit |
| Voltage state 0 guaranteed | <= 5 V for I1...IA and IH...IR discrete input circuit <= 5 V for IB...IG used as discrete input circuit |
| Current state 1 guaranteed | >= 1.2 mA (IB...IG used as discrete input circuit) >= 2.2 mA (I1...IA and IH...IR discrete input circuit) |
| Current state 0 guaranteed | <= 0.5 mA (IB...IG used as discrete input circuit) <= 0.75 mA (I1...IA and IH...IR discrete input circuit) |
| Input compatibility | 3-wire proximity sensors PNP for discrete input |
| Analogue input number | 4 |
| Analogue input type | Common mode |
| Analogue input range | 0...10 V 0...24 V |
| Maximum permissible voltage | 30 V for analogue input circuit |
| Analogue input resolution | 8 bits |
| LSB value | 39 mV for analogue input circuit |
| Conversion time | Smart relay cycle time for analogue input circuit |
| Conversion error | +/- 5 % at 25 °C for analogue input circuit +/- 6.2 % at 55 °C for analogue input circuit |
| Repeat accuracy | +/- 2 % at 55 °C for analogue input circuit |
| Operating distance | 10 m between stations, with screened cable (sensor not isolated) for analogue input circuit |
| Input impedance | 12 kOhm for IB...IG used as analogue input circuit 12 kOhm for IB...IG used as discrete input circuit 7.4 kOhm for I1...IA and IH...IR discrete input circuit |
| Number of outputs | 4 relay |
| Output voltage limits | 24...250 V AC (relay output) 5...30 V DC (relay output) |
| Contacts type and composition | NO for relay output |
| Output thermal current | 8 A for all 4 outputs for relay output |
| Electrical durability | AC-12: 500000 cycles at 230 V, 1.5 A for relay output conforming to EN/IEC 60947-5-1 AC-15: 500000 cycles at 230 V, 0.9 A for relay output conforming to EN/IEC 60947-5-1 DC-12: 500000 cycles at 24 V, 1.5 A for relay output conforming to EN/IEC 60947-5-1 DC-13: 500000 cycles at 24 V, 0.6 A for relay output conforming to EN/IEC 60947-5-1 |
| Switching capacity in mA | >= 10 mA at 12 V (relay output) |
| Operating rate in Hz | 0.1 Hz (at Ie) for relay output 10 Hz (no load) for relay output |
| Mechanical durability | 10000000 cycles for relay output |
| [Uimp] rated impulse withstand voltage | 4 kV EN/IEC 60947-1 and EN/IEC 60664-1 |
| Clock | With |
| Response time | 10 ms (from state 0 to state 1) for relay output 5 ms (from state 1 to state 0) for relay output |
| Connections - terminals | Screw terminals, 1 x 0.2...1 x 2.5 mm² (AWG 25...AWG 14) semi-solid Screw terminals, 1 x 0.2...1 x 2.5 mm² (AWG 25...AWG 14) solid Screw terminals, 1 x 0.25...1 x 2.5 mm² (AWG 24...AWG 14) flexible with cable end Screw terminals, 2 x 0.2...2 x 1.5 mm² (AWG 24...AWG 16) solid Screw terminals, 2 x 0.25...2 x 0.75 mm² (AWG 24...AWG 18) flexible with cable end |
| Tightening torque | 0.5 N.m |
| Overvoltage category | III conforming to EN/IEC 60664-1 |
| Net weight | 0.25 kg |
Environment
| Immunity to microbreaks | 1 ms |
| Product certifications | GL CSA UL GOST C-Tick |
| Standards | EN/IEC 61000-4-12 EN/IEC 61000-4-4 level 3 EN/IEC 61000-4-5 EN/IEC 61000-4-11 EN/IEC 61000-4-2 level 3 EN/IEC 60068-2-6 Fc EN/IEC 61000-4-6 level 3 EN/IEC 60068-2-27 Ea EN/IEC 61000-4-3 |
| IP degree of protection | IP20 (terminal block) conforming to IEC 60529 IP40 (front panel) conforming to IEC 60529 |
| Environmental characteristic | EMC directive conforming to EN/IEC 61000-6-2 EMC directive conforming to EN/IEC 61000-6-3 EMC directive conforming to EN/IEC 61000-6-4 EMC directive conforming to EN/IEC 61131-2 zone B Low voltage directive conforming to EN/IEC 61131-2 |
| Disturbance radiated/conducted | Class B conforming to EN 55022-11 group 1 |
| Pollution degree | 2 conforming to EN/IEC 61131-2 |
| Ambient air temperature for operation | -20…40 °C in non-ventilated enclosure conforming to IEC 60068-2-1 and IEC 60068-2-2 -20…55 °C conforming to IEC 60068-2-1 and IEC 60068-2-2 |
| Ambient air temperature for storage | -40…70 °C |
| Operating altitude | 2000 m |
| Maximum altitude transport | 3048 m |
| Relative humidity | 95 % without condensation or dripping water |
Offer Sustainability
| Sustainable offer status | Green Premium product |
| REACh Regulation | REACh Declaration |
| EU RoHS Directive | Pro-active compliance (Product out of EU RoHS legal scope) EU RoHS Declaration |
| Mercury free | Yes |
| RoHS exemption information | Yes |
| China RoHS Regulation | China RoHS declaration |
| Environmental Disclosure | Product Environmental Profile |
| Circularity Profile | End of Life Information |
| WEEE | The product must be disposed on European Union markets following specific waste collection and never end up in rubbish bins |
Contractual warranty
| Warranty | 18 months |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 22 reviews
Sort
Product Reviews
★★★★★ 5
A must try for hot sleepers!
Color: Blue, Size: Queen (U.S. Standard), Set name: Silky, Color: Blue, Size: Queen (U.S. Standard), Set name: Silky
If you are a hot sleeper these pillowcases are for you! Not only are they silky and beautiful, but they are cool to the touch!The Arc-Chill fabric absorbs heat and instantly cools your skin! If you are prone to insomnia, night sweats, give these a try! They come in a 2 pack and have a few different colors to try out. Highly recommend.
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Reviewed in the United States on May 27, 2026
★★★★★ 5
Freezing !
Color: Gray, Size: Queen (U.S. Standard), Set name: Stretchy and Soft
### Product Review: Avolare 2 Pack Cooling Pillow Cases
#### Overview
The Avolare 2 Pack Cooling Pillow Cases are designed to provide a cooler and more comfortable sleeping experience, especially for hot sleepers. Made with Arc-Chill fabric, these pillowcases promise to offer a cooling effect, protect hair and skin, and add a touch of luxury with their soft and silky texture. The pillowcases come in a standard gray color, suitable for standard and queen-size pillows.
#### Material and Design
**Rating: ★★★★★**
The Avolare Cooling Pillow Cases are crafted from Arc-Chill fabric, known for its high Q-max value (>0.5), indicating excellent cooling properties. The material feels incredibly soft and silky to the touch, providing a luxurious feel that enhances sleep quality. The gray color is neutral and versatile, fitting seamlessly with various bedding styles.
The design includes a hidden zipper, ensuring that the pillowcase stays securely on the pillow while maintaining a smooth and sleek appearance. The zipper is discreet and doesn’t interfere with comfort, which is a thoughtful addition to the overall design.
#### Cooling Effect
**Rating: ★★★★★**
One of the standout features of these pillowcases is their cooling effect. The Arc-Chill fabric effectively wicks away heat and moisture, making them ideal for hot sleepers or those living in warmer climates. Users have reported a noticeable difference in temperature, which contributes to a more restful and comfortable night’s sleep. This cooling property is particularly beneficial during the summer months or for individuals who tend to overheat while sleeping.
#### Hair and Skin Benefits
**Rating: ★★★★☆**
In addition to their cooling properties, the Avolare pillowcases are also beneficial for hair and skin. The smooth and silky texture reduces friction, helping to prevent hair breakage and skin irritation. This can be particularly advantageous for individuals with sensitive skin or those prone to hair damage. While the pillowcases are not a cure-all for skin and hair issues, they do contribute positively by creating a gentler surface.
#### Durability and Care
**Rating: ★★★★☆**
The Avolare Cooling Pillow Cases are easy to care for, maintaining their cooling properties and softness even after multiple washes. They are machine washable, which adds to their convenience. However, it is recommended to follow the care instructions carefully to ensure the longevity of the cooling effect and fabric quality.
#### Versatility
**Rating: ★★★★☆**
These pillowcases are designed to fit both standard and queen-size pillows, adding to their versatility. They are perfect for use in any bedroom setting, from master bedrooms to guest rooms, and can be paired with various pillow types and fillings.
#### Pros and Cons
**Pros:**
- Excellent cooling properties ideal for hot sleepers.
- Soft and silky texture is gentle on hair and skin.
- Hidden zipper design for a secure fit.
- Machine washable and easy to care for.
- Versatile fit for standard and queen-size pillows.
**Cons:**
- Cooling effect may diminish slightly with frequent washing.
- Limited color options (only available in gray).
#### Final Verdict
**Overall Rating: ★★★★☆**
The Avolare 2 Pack Cooling Pillow Cases are an excellent choice for anyone looking to enhance their sleeping experience, particularly hot sleepers. The cooling properties of the Arc-Chill fabric, combined with the soft and silky texture, provide a comfortable and luxurious feel. The hidden zipper design adds practicality without sacrificing aesthetics.
While there are minor drawbacks, such as potential diminishing of the cooling effect with frequent washing and limited color options, the overall benefits make these pillowcases a worthwhile investment. If you’re seeking to improve your sleep quality and enjoy a cooler, more comfortable night’s rest, the Avolare Cooling Pillow Cases are definitely worth considering.
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Reviewed in the United States on June 1, 2024
★★★★★ 4
Cool as the other side of the pillow
Color: Gray, Size: Queen (U.S. Standard), Set name: Stretchy and Soft
Good quality and keeps cool on side of pillow. Have to flip pillow for constant cooling is the ok only down side. Love the material as it is very soft and silky feel to it. Doesn't wrinkle over pillow and had some good color options. Easy to clean. Fair price for a good product
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Reviewed in the United States on January 11, 2026
★★★★★ 5
Love!
Color: Blue, Size: Queen (U.S. Standard), Set name: Stretchy and Soft
Awesome cases! They really are cool to the touch. I didn’t sleep hot at all. I have a “cut-out” memory foam pillow, and this stretched around it perfectly. It is flexible enough that it doesn’t impede with the cut out. And while the material is “silky,” it doesn’t slide around the pillow while sleeping on it. The zipper feature is perfect. I washed and dried per the tag instructions and they washed very well. Super happy.
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Reviewed in the United States on April 8, 2026
★★★★★ 5
AMAZING - LOVE THESE!
Color: Blue, Size: Queen (U.S. Standard), Set name: Stretchy and Soft
I've been using these pillow cases for more than 6 months and LOVE them. They are well made, no wrinkling, fraying or wearing out, even with a weekly washing. I love the zippers on them, my pillows fits perfectly in the case and don't constantly escape from the case overnight. They definitely perform as described: they keep me cool at night and don't smell and actually don't make a mess of my hair. I bought an extra one and put it on a pillow I keep close to my body which helps me from overheating during the night. They are a great value for the price, I wish I could get top sheets in the same style as these and I'd be in heaven!
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Reviewed in the United States on March 23, 2026
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