
D21-PS Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $709.02 | Condition is New, THERMOLEC D21-PS / D21PS (BRAND NEW), shipping cost = $12.90 | 99.7% |



The Thermolec D21-PS Relay Controller is a versatile and reliable device designed for controlling multiple electrical loads in various applications. This 2-channel relay controller is equipped with solid-state relays, offering superior performance and longevity compared to traditional mechanical relays.
The D21-PS features two independently controlled 20A, 250VAC/DC relay outputs. Each relay has a built-in diode, ensuring proper operation in both AC and DC applications. The controller is designed to operate in temperatures ranging from -40 C to 85 C, making it an ideal choice for use in industrial environments.
The Thermolec D21-PS Relay Controller offers a wide range of input options, including 12VDC and 24VDC, allowing for compatibility with various power sources. It also features opto-isolated input contacts, providing electrical isolation between the control circuit and the load, ensuring safety and preventing electrical noise from affecting the control signal.
The controller is equipped with LED indicators for each relay channel, providing easy-to-understand visual feedback on the status of the relay outputs. The D21-PS is designed for ease of installation and operation, with a compact size and mounting screw holes on the bottom of the unit.
The Thermolec D21-PS Relay Controller is a high-quality, reliable solution for controlling electrical loads in a variety of applications, including HVAC systems, industrial control systems, and automation systems. Its solid-state relays, wide input voltage range, and opto-isolated input contacts make it a versatile and durable choice for any application requiring reliable relay control.
Pros of buying Thermolec D21-PS Relay Controller:1. High-quality construction: The Thermolec D21-PS relay controller is built to withstand harsh environments, making it ideal for industrial applications.
2. Versatile: This relay controller can handle a wide range of loads, from 12V to 240V AC and 12V to 48V DC.
3. Easy to use: The D21-PS has a user-friendly interface with LED indicators and a straightforward programming process.
4. Reliable: Thermolec's D21-PS relay controller is known for its dependability, with a long lifespan and minimal downtime.
5. Energy-efficient: The controller features a power-saving mode, which reduces energy consumption when not in use.
Cons of buying Thermolec D21-PS Relay Controller:1. Price: Compared to some lower-end relay controllers, the Thermolec D21-PS is relatively expensive.
2. Limited programming options: While the controller is easy to program, it may not offer as many advanced programming options as some other high-end models.
3. Limited input and output channels: The D21-PS has a limited number of input and output channels, which may not be sufficient for some applications.
In conclusion, the Thermolec D21-PS relay controller is a high-quality, reliable, and versatile option for controlling electrical loads in industrial applications. Its construction, ease of use, and energy-saving features make it an excellent choice for many scenarios. However, its price and limited input/output channels may be a drawback for some users. If price is not a concern and the number of input/output channels is sufficient for your needs, the Thermolec D21-PS relay controller is a recommended purchase. If you are looking for a more cost-effective option or require more advanced programming features, you may want to consider other options.
Details:
Condition: removed from a new heater that had shipping damage. Removed from heater brand Thermolec model SC-cutback.
specifications maxohvac:
- brand: Thermolec
- mpn: D21-ps
- part type: Controller
seller maxohvac:
- rating: 100.0%
- # reviews: 997
- city: elkton, south dakota
offer maxohvac:
- best offers: true
- availability: in stock
- started: june 14, 2024
- price: $709.02
- item condition: New
- sold #: 29
- in stock #: 1
- options: ship-to-home
returns maxohvac:
- paid by: buyer
- policy: returns accepted
- time: 30 days
- method: money back
general maxohvac:
- category: Business & Industrial > Hvac Refrigeration
payments maxohvac:
- credit card: discover
- wallet: google-pay
shipping maxohvac:
- transit: 4-7 days
- class: standard
- carrier: usps
- service: usps ground advantage
- type: calculated
