RCM420-D-2 BENDER

RCM420-D-2 BENDER Power module

Product  Description：

The technical parameters of the RCM420-D-2 highlight its precision and versatility in industrial environments. It supports a monitored system voltage of up to $720 \text{ V}$ and operates on a flexible supply voltage ($U_s$) ranging from AC/DC $70 \text{ V}$ to $276 \text{ V}$ at frequencies of $42 \text{ Hz}$ to $460 \text{ Hz}$. The device features two independently adjustable response values, $I_{\Delta n1}$ (pre-alarm) and $I_{\Delta n2}$ (alarm), both ranging from $10 \text{ mA}$ to $10 \text{ A}$. Its frequency range for monitoring spans from $42 \text{ Hz}$ to $2000 \text{ Hz}$. For timing control, users can adjust delay settings ($t$, $t_{on}$, and $t_{off}$) from $0 \text{ s}$ up to $10 \text{ s}$. The output consists of two separate alarm relays, each equipped with one changeover contact. Additionally, the unit includes an RS-485 interface utilizing the Bender BMS protocol for data communication and a multi-functional LC display for real-time monitoring.

Product Advantages

One of the primary advantages of the RCM420-D-2 is its ability to significantly increase plant availability. By providing a pre-alarm before a total system shutdown occurs, it enables predictive maintenance and prevents costly unplanned downtime. The digital display provides high transparency by showing the currently measured residual current, making it much easier for technicians to troubleshoot specific circuits. Its wide frequency range ensures that it remains reliable even in electrical environments with high harmonic content. Furthermore, the compact DIN-rail mounting design allows for easy integration into existing distribution boards, while the two-stage alarm system provides flexible responses to different fault levels.

Important Considerations and Precautions

When implementing the RCM420-D-2, several precautions must be observed to ensure safety and accuracy. First, this device is a Type A monitor and is not designed to detect smooth DC residual currents; systems containing power electronics that could produce pure DC faults may require a Type B monitor instead. The device must be used in conjunction with a compatible Bender measuring current transformer (such as the CTBC or W series) to function correctly. It is strictly intended for use in grounded (TN or TT) systems and should never be used in ungrounded (IT) systems. Installation and parameter configuration must be carried out by qualified electrical professionals, and the integrated "Test" button should be used periodically to verify the functional integrity of the device and its wiring.

Product Applications

The RCM420-D-2 is widely utilized across various sectors where electrical safety and system continuity are paramount. In industrial manufacturing, it is used to monitor motors, production lines, and heavy machinery to prevent electrical fires and equipment damage. In data centers and telecommunications facilities, it ensures that leakage currents are managed without interrupting sensitive IT services. It is also an essential component in commercial building management for monitoring main distribution boards in malls, hotels, and hospitals. Additionally, it finds application in the renewable energy sector for monitoring AC circuits within solar or wind power installations where pulsed DC components might be present.

The structure and details of the product：

Our services：

Shipping Port:  China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

Warranty: one year

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JUSTWELL PTE. LTD

Our main products include DCS control system spare parts, PLC system spare parts, and robot system spare parts. Our advantageous brands include Allen Bradley, Bently Nevada, ABB, HIMA, Reliance, Bender, National Instruments, Emerson Ovation, Honeywell, Siemens, Allen Bradley, ICS Triplex, FOXBORO, Schneider, GE Fanuc, Motorola, HIMA, Prosoft, and other imported industrial components. Our main products serve a wide range of electronic, metallurgical, chemical, and power plants Industries such as steel mills, rubber, cement, machinery and equipment, and construction.