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Description
Waveshare Industrial 4-Ch PWM Output Module Modbus RTU RS485, Adjustable Frequency & Duty Cycle, Modbus RTU PWM Output 4CH1. This product is an industrial standard isolated RS485 to PWM pulse output module. Four channels of frequency and duty cycle are independently adjustable. It adopts Modbus RTU protocol and includes built in protection circuits such as power isolation, magnetic coupling isolation, self recovery fuse, and TVS. 2. The output uses high speed optocoupler isolation, and the output high level voltage can be selected via internal jumpers. 3. Four channels
1. This product is an industrial standard isolated RS485 to PWM pulse output module. Four channels of frequency and duty cycle are independently adjustable. It adopts Modbus RTU protocol and includes built-in protection circuits such as power isolation, magnetic coupling isolation, self-recovery fuse, and TVS.
2. The output uses high-speed optocoupler isolation, and the output high-level voltage can be selected via internal jumpers.
3. Four channels of PWM pulse output with frequency and duty cycle independently adjustable.
4. Supports setting device address (1 to 255) to cascade multiple devices via the RS485 bus.
5. On-board voltage regulator chip supports wide voltage supply from 7V to 36V.
6. On-board integrated power isolation provides stable isolation voltage; the isolated end requires no additional power supply.
7. On-board integrated magnetic coupling isolation enables signal isolation, with high reliability and strong anti-interference capability.
8. On-board self-recovery fuse and TVS (Transient Voltage Suppressor) effectively suppress surge voltage and transient spike voltage in the circuit, protecting against overcurrent, overvoltage, lightning, and static electricity.
9. Built-in watchdog ensures stable output without crashing.
10. Rail-mounted enclosure design, compact size, easy installation.
11. External 3 LED indicators for convenient viewing of power status and signal transmission/reception status.
Parameters:
1. Communication Interface: RS485
2. Communication Baud Rate: 4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000
3. Default Communication Format: 9600, N, 8, 1
4. Modbus Protocol: Standard Modbus RTU Protocol
5. Supply Voltage: DC 7V to 36V
6. Output Voltage: Default 3.3V, can be set to 5V via internal jumper
7. Output Current: Signal type, less than 30mA
8. Pulse Frequency: 1Hz to 200KHz
9. Frequency Resolution: 0.01Hz
10. Frequency Accuracy: 0.5 percent (equivalent to 5 per mille)
11. Duty Cycle: 0 to 100 percent
12. Duty Cycle Resolution: 0.01 percent
13. Duty Cycle Accuracy: 0.5 percent (1Hz to 50KHz), 1 percent (50KHz to 200KHz)
Specification:
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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
4.4 ★★★★★
Based on 25 reviews
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Product Reviews
★★★★★ 5
They Shouldn’t Work But Here We Are
Size: 13 Little Kid, Color: Mystic Purple
Let’s address the elephant in the room: Crocs look like a rubber cheese grater had a baby with a sandal. And yet somehow these things are a parenting cheat code. The comfort is unreal (10/10). Kids slip them on and suddenly they’re walking on clouds, bouncing around like tiny caffeinated marshmallows. Cleaning them is almost suspiciously easy (10/10) mud, juice, questionable playground goo just rinse and move on like nothing ever happened. The ventilation holes (9/10) actually do their job, keeping little feet from becoming sweaty disasters, though they also double as convenient entry points for sand, pebbles, and whatever treasures your kid decides to collect.
Style wise (7/10), look… no one is winning fashion awards here, but kids love them and confidence is half the battle. The heel strap (9/10) deserves a medal flip it back and suddenly your child enters “sport mode” like a video game character with boosted speed stats. The color options (10/10) are wild enough to satisfy even the most chaotic tiny human, from neon explosions to surprisingly normal shades. They’re ridiculously lightweight (10/10), which is great until your kid forgets they’re wearing them and tries to wear them to bed.
Durability (9/10) is solid they can handle running, jumping, puddle stomping, and general kid nonsense without falling apart. And the independence factor (10/10) Huge. No laces, no struggle, no dramatic “I can’t do it!” moments just slip on and go. Crocs as a brand (9/10) clearly know their lane comfort over cool, and honestly, it works.
Final Score: 9.2/10
They may not be pretty, but they’re practical, indestructible, and weirdly lovable like the chicken nuggets of footwear
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Reviewed in the United States on March 29, 2026
★★★★★ 5
Comfy and great quality
Size: 3 Little Kid, Color: Blue Bolt
Perfect fit and comfortable!
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Reviewed in the United States on May 15, 2026
★★★★★ 5
Kid friendly
Size: 6 Big Kid, Color: Blue Calcite
Easy to slip on, and simple to clean, which is really convenient. My child says they’re comfortable for playing outside and wearing around the house. The only downside is they can get a little slippery on wet surfaces, and the fit seems slightly wide. Overall, they’re durable and practical, but maybe not the best option for every activity. I buy new crocs for my kids every year, we love it! Add little charms to create your child’s own croc style.
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Reviewed in the United States on May 20, 2026
★★★★★ 4
Expensive and Ugly
Size: 3 Little Kid, Color: Blue Bolt
My grandson loves and wears crocs all the time so he really appreciated a new pair of them. I personally think they’re ugly and would never wear. Rubber shoes?! Ridiculous. There’s plenty of other stylish and nice looking shoes that are just as comfortable. The cost of crocs is crazeeee! That’s why I will only give 4 stars. However, it was all about pleasing my grandkid.
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Reviewed in the United States on March 2, 2026
★★★★★ 5
Good looking shirts. Will not disappoint.
Size: Large, Color: Carbon Heather
These shirts are a great quality. They wash great with no shrinkage. They are very comfortable based on my husband’s feedback. They look as advertised. The variation in colors were perfect. The size fits perfectly. My husband is an XL for the long sleeve but a L for the short sleeved Carhartt T-shirts. The neckline is comfortable. Would recommend to others and will be purchasing more.
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Reviewed in the United States on April 21, 2026