Derivative Action in PID Control Without Noise Problems
Learn what derivative action contributes to a PID loop, why it can amplify measurement noise and setpoint changes, and how filtering, sampling, and staged tests make D tuning safer.
Manufacturer: ABB
Product No.: SPBRC400
Country of origin:Switzerland
Product Type: Controller with Expanded Memory
Barcode: 8537101190
Payment: T/T, Western Union
Weight: 500g
Dimensions: 3.5 cm x 32 cm x 17.6 cm
Shipping port: Xiamen
Warranty: 12 months
The SPBRC400 (SPBRC400) is a high-performance central unit controller featuring expanded memory, designed for the ABB Symphony Plus (Harmony Rack HR Series) control system. As a core component of industrial automation, this controller manages complex logic and data processing within the Harmony Rack hardware environment. The SPBRC400 is engineered to provide reliable electric control for systems operating at voltages not exceeding 1,000 V, making it a critical asset for power generation and water industries where stable, long-term control is essential.
The SPBRC400 operates as a Central Unit within the Symphony Plus architecture. To maintain system time and critical volatile data during power cycles, the unit is equipped with a single Lithium button cell battery weighing 5 g. This hardware is categorized under the HR Series (Harmony Rack) and is designed for high-density control applications that require the increased processing overhead provided by its expanded memory capacity.
| Feature | Specification |
| Model |
SPBRC400 |
| Brand |
ABB |
| Product Type |
Central Unit |
| Memory |
Expanded Memory |
| Battery Type |
1x Lithium Button Cell (5 g) |
| Net Weight |
0.499 kg |
| Dimensions (H x W x D) |
358.14 x 271.78 x 71.12 mm |
| HS Code |
85371091 |
| WEEE Category |
5. Small Equipment (No dimension > 50 cm) |
What is the primary function of the battery in the SPBRC400?The controller contains one Lithium button cell battery used to back up internal real-time clocks or specific memory registers when the main system power is disconnected.
Which control system series is this controller compatible with?The SPBRC400 is specifically designed for the Symphony Plus Control Systems, specifically within the Harmony Rack (HR Series) hardware family.
What are the voltage limitations for the bases equipped with this controller?Following standard industrial classifications for this product type, it is intended for use in bases, panels, or cabinets for electric control where the voltage does not exceed 1,000 V.
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Returns & Warranty



Global Express Shipping
Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Color pattern |
Multicolor
|
| Country of origin |
Switzerland
|
| Power source |
DC Power
|