Product Feature
The RNB2000 Low Voltage Variable Frequency Drive (VFD), with its high-end control platform, rich interface resources, multiple communication modes, advanced control algorithms, and flexible expansion interfaces, is designed to meet the high standards of production processes across various applications.
- Adopting the latest motor control digital signal processor (DSP) from TI, USA, its main frequency can reach 150 MHz.
- Utilizing the fourth-generation IGBT module from Infineon, Germany, combined with a maximum junction temperature of 175°C and PWM modulation mode, the drive reduces switching losses and eliminates the need for derating even at an ambient temperature of 50°C.
- Supporting both asynchronous and permanent magnet synchronous motors, it can accurately recognize motor parameters. Two sets of motor parameters can be configured, allowing the drive to switch between two different motors via communication or the multifunction terminal.
- The V/F control mode enables high-precision current limit control, preventing overcurrent alarms during fast acceleration/deceleration or stalls, while also providing protection for the drive. The vector control mode allows high-precision torque limiting control, enabling the drive to deliver either strong or soft torque according to the user's process control needs, thus protecting the mechanical equipment.
| Control Mode | Start Torque | Speed Range | Speed Precision | Torque Response |
| V/F control | 0.5Hz 180% | 1:100 | ±0.5% | |
| Vector control without PG | 0.5Hz 180% | 1:100 | ±0.2% | ＜10ｍｓ |
| Vector control with PG | 0 Hz 200% | 1:200 | ±0.02% | ＜5ｍｓ |
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- V/F Separation Control Mode: In this mode, the output frequency and output voltage can be set separately. This control mode is suitable for frequency conversion power supplies, torque motor control, and similar applications.
- Intelligent Expansion Interface: The low voltage variable frequency drive features an intelligent expansion interface that allows simultaneous connection of two expansion cards, meeting user requirements for industry-specific control.
- PG Vector Control: Even when the encoder is not positioned at the shaft end, PG vector control can still be achieved as long as the motor shaft and the encoder shaft maintain a fixed deceleration ratio.
- Speed Search: The speed search function is accurate and reliable, supporting a smooth, no-impact start of a rotating motor.
- Process PID Control: The process PID control has extensive settings and feedback modes, supporting the easy switching between two sets of proportional, integral, and differential parameters, as well as the choice between positive and negative feedback. This control is especially useful for energy-saving applications in fans and pumps.
- DC Power Input: The drive supports DC power input, allowing users to conveniently create a common DC bus application.
- Overvoltage Stall Protection: During fast deceleration of a large inertia load, regeneration energy can cause an overvoltage fault. Instantaneous adjustments of the output frequency can reduce the likelihood of overvoltage trips, ensuring continuous and reliable system operation.
- Undervoltage Adjustment: When instantaneous undervoltage or power failure occurs, the DC bus voltage remains stable by automatically reducing the output frequency, guaranteeing the continuous operation of the drive for a short period. This function is particularly useful for fans and pumps.
- Overcurrent Stall Protection: During the fast acceleration of a heavy load, large slip can result in an overcurrent fault. Instantaneous adjustments of the output frequency help reduce the probability of overcurrent trips, ensuring continuous and reliable operation of the system.
- Low-Frequency Oscillation Suppression: When starting a large power motor under no-load or light-load conditions, acute oscillations can occur, causing fault trips. Enabling this function effectively suppresses oscillations, ensuring reliable system operation.
- Wave-by-Wave Current Limiting Function: During heavy load starts or rapid increases in load, this function automatically limits the output current before overcurrent faults occur, preventing frequent tripping of the VFD.
- Parameter Backup: This function provides convenience for users to back up, test, and restore parameters.
Adaptable performance meets simplicity in a durable design.
The RNB2000 Low Voltage Variable Frequency Drive is a general-purpose drive designed to reduce automation complexity while enhancing operational dependability and energy efficiency across diverse processes. Engineered to manage compressors, conveyors, mixers, pumps, centrifuges, fans, and both variable- and constant-torque loads, it includes critical integrated components by default. This streamlines drive selection and eliminates the need for hardware add-ons.
Intuitive configuration menus and guidance tools expedite deployment, startup, operation, and maintenance. As a member of RENLE's fully interoperable drive family, the RNB2000 uses shared architecture and control interfaces, improving ease of use and ensuring seamless integration across industrial sectors.
Key benefits
- Versatile open-loop vector drive performance.
- High-performance open-loop vector control mode.
- High-performance closed-loop control function.
- Closed-loop vector control compatible with both asynchronous motors and permanent magnet synchronous motors.
- Supports multiple PG card extensions.
- Scalable GPRS and Wi-Fi wireless monitoring.
- Integration of synchronous and asynchronous drives, with comprehensive open-loop and closed-loop control.
Model Description
| RN | Shanghai RENLE Science & Technology Co., Ltd. |
| B | Low-voltage Variable Frequency Drive |
| 2 | 2000 Series |
| XXX | Power Code: such as 000: 0.75kW; 001: 1.5kW; 037: 37kW; 110: 110kW... |
| 2S -- | 380 VAC 2S: 220 VAC Q: Specialized for Hoisting U: Specialized for Oilfield HF: Specialized for High-speed Permanent Magnet Synchronous Motor |
Examples of product applications
Application in the hoisting industry
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High starting torque and fast response
Vector control without PG: 0.25Hz, up to 180% output torque, with a <10ms torque response time.
Vector control with PG: 0Hz, up to 200% output torque, with a <5ms torque response time.
This function prevents accidents such as load slip caused by insufficient torque at low speeds.
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Support for dual motor switching
The VFD can store two sets of motor parameters separately, allowing it to drive two different motors-one for linear motion and one for translational movement-using a single VFD.
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Brake control function
The brake logic control and monitoring function of the VFD is designed for the hoisting industry, providing greater flexibility to achieve smooth starting and stopping of cranes, effectively preventing objects from dropping.
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Comprehensive protection function
With a full range of alarm and protection functions, the VFD meets industry safety standards.
Application in the oilfield industry
Tower cranes, bridge cranes, harbor cranes, electric hoists, construction hoists, winch gates, electric winches, and mine hoists.
- Low frequency and high torque.
- No shock to the power grid during operation.
- No belts and pulleys: The asynchronous motor on the oil well is replaced by a semi-direct drive synchronous motor for improved safety.
- Semi-direct drive synchronous motors are more efficient than asynchronous motors.
- Energy-saving: The energy generated when the oil well pumping machine operates downstream can be fed back into the power grid with the built-in energy feedback unit.
- Adjustable stroke: The stroke can be adjusted using a knob, eliminating the need to replace the belt and gear.
Application
Beam-pumping unit and tower pumping unit.
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Product Specification
RNB2000 Series VFD Technical Parameter Sheet
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Input-output characteristics |
Input voltage range |
Single-phase 220 VAC (-15%) ~ 240 VAC (+10%); Three-phase 380 VAC (-15%)~ 440 VAC (+10%) |
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Input frequency range |
50 ~ 60 Hz±5% |
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Output voltage range |
0 ~ Rated input voltage |
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Output frequency range |
0 ~ 600 Hz, unit 0.01Hz |
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Output overload capacity |
150% 1 min; 180% 10s; 200% 1 s |
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Operation control characteristics |
Control mode |
V/F control; No PG vector control 0 (for synchronous motors); No PG vector control 1 (for asynchronous motors) |
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Speed control range |
Asynchronous motor 1：200 (V/F control, No PG vector control 1); Synchronous motor1：20 (No PG vector control 0) |
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Speed control accuracy |
±0.5% (V/F control); ±0.2% (No PG vector control) |
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Speed fluctuation |
± 0.3% (No PG vector control) |
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Torque response |
<20ms (No PG vector control) |
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Torque control accuracy |
10% (No PG vector control) |
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Starting torque |
Asynchronous motor: 0.25 Hz/150% (No PG vector control 1); Synchronous motor: 2.5 Hz/150% (No PG vector control 0) |
RNB2000 Series Technical Parameter Sheet
continued from previous table
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Basic functions |
Starting frequency |
0.00 ~ 50.00Hz |
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Acceleration and deceleration time |
0.0 ~ 3000.0s |
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Carrier frequency |
1.0kHz ~ 15.0kHz |
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Frequency setting mode |
UP/DOWN setting, digital setting, analog setting, pulse frequency setting, multispeed operation setting, simple PLC setting, PID setting, Modbus communication setting, PROFIBUS communication setting, etc. A combination of settings and switching of setting channels is possible. |
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Start-up method |
Starting frequency start, Start after DC brake, speed search start |
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Stopping method |
Deceleration stop, free stop, deceleration stop + DC brake, deceleration stop + flux brake |
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Motor type |
asynchronous motors, permanent magnet synchronous motor |
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DC braking capacity |
DC braking frequency: 0 ~600Hz; DC braking waiting time: 0 ~ 50s; DC braking current: 0.0 ~ 100.0% (VFD rated current); DC braking time: 0.0 ~ 50.0s. |
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Automatic voltage adjustment |
It can keep a constant voltage output when the power grid voltage changes |
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Instantaneous frequency reduction |
It can reduce the frequency instantly to maintain the bus voltage when the power grid is undervoltage. |
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Control terminals |
Digital input terminals |
10 inputs as standard, 1 of which can be used as a high-speed pulse input (HDI1) |
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Analog output terminals |
3 analog inputs as standard : AI1: 0 ~ 10V or 0/4 ~ 20mA input selectable AI2: 0 ~10V or 0/4 ~ 20mA input selectable AI3: -10V ~ +10V input |
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Digital output terminals |
2 multi-function collector outputs as standard, 1 of which can be used as a high-speed pulse output (HDO). |
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Analog input terminals |
2 outputs as standard: AO1, AO2 (0 ~ 10V or 0/4 ~ 20mA selectable) |
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Relay output |
2 relay outputs as standard |
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Standard communication interface |
RS485 communication |
Provide RS485 communication interface to communicate with external RS485, and support Modbus protocol (RTU mode). |
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Extended communication interface |
PROFIBUS-DP, Ethernet, CAN open |
Supports PROFIBUS-DP, CAN open, and Ethernet communication. |
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Fault protection |
Acceleration overcurrent, deceleration overcurrent, constant speed overcurrent, acceleration overvoltage, deceleration overvoltage, constant speed overvoltage, Bus undervoltage fault, motor overload, VFD overload, input phase loss, output phase loss, rectifier module overheating fault, inverter module overheating fault, external fault, communication fault, current detection fault, motor parameter recognition fault, EEPROM operation fault, PID feedback disconnection, brake unit fault, manufacturer running time reached. |
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Special functions |
Parameter copy, parameter backup, common DC bus, free switching of two sets of motor parameters, frequency switching, DC braking, short-circuit braking, flux braking, user password usage, over-modulation function, vector control of synchronous motors, speed tracking, oscillating-frequency control, fixed-length control, counting function, pre-excitation, overcurrent stall, overvoltage stall, power-down restart, skip frequency, 4 sets of acceleration/deceleration times, motor over-temperature protection, flexible fan control, process PID control, multi-speed control, instantaneous frequency reduction function, simple PLC control, droop control, parameter identification, weak magnet control, high-precision torque control, V/F separation control, fault recording, etc. |
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Keyboard display |
LCD |
LCD keyboard, optional LED digital keyboard with potentiometer |
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Others |
Operation place |
Indoor, at an altitude of less than 1,000 meters above sea level, free from direct sunlight, and free from dust, corrosive gases, flammable gases, oil mist, water vapor, dripping, salt, etc. |
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Ambient temperature |
-10 ~ +40℃, the device should be used with reduced capacity in 40 ~ 50℃. The rated output current should be reduced by 1% for every 1℃ of increase. |
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Humidity |
5 ~ 95%(no condensation) |
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Altitude |
0 ~ 2000 meters, the device should be used with reduced capacity when above 1000 meters. The rated output current should be reduced by 1% for every 100 meters of elevation. |
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Vibration |
less than 0.5g |
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Storage temperature |
-40 ~ +70℃ |
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Product Specification
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Model |
Power (kW) |
Input voltage (V) |
Input current (A) |
Output current (A) |
Power of applicable motor (kW) |
Note |
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RNB2000-2S |
0.75 |
Single-phase 220 VAC |
8.2 |
4.5 |
0.75 |
Built-in brake unit as standard |
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RNB2001-2S |
1.5 |
14.0 |
7.0 |
1.5 |
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RNB2002-2S |
2.2 |
23.0 |
9.6 |
2.2 |
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RNB2000 |
0.75 |
Three-phase 380 VAC |
8.2 |
4.5 |
0.75 |
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RNB2001 |
1.5 |
5.0 |
3.8 |
1.5 |
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RNB2002 |
2.2 |
5.8 |
5.3 |
2.2 |
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RNB2004 |
4.0 |
12.0 |
9.5 |
4.0 |
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RNB2005 |
5.5 |
18.5 |
14 |
5.5 |
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RNB2007 |
7.5 |
22.5 |
18.5 |
7.5 |
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RNB2011 |
11 |
30.0 |
25.0 |
11 |
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RNB2015 |
15 |
39.0 |
32.0 |
15 |
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RNB2018 |
18.5 |
45.0 |
38.0 |
18.5 |
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RNB2022 |
22 |
54.0 |
45.0 |
22 |
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RNB2030 |
30 |
68.0 |
60.0 |
30 |
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RNB2037 |
37 |
84.0 |
75.0 |
37 |
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RNB2045 |
45 |
98.0 |
92.0 |
45 |
Optional built-in brake unit |
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RNB2055 |
55 |
123.0 |
115.0 |
55 |
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RNB2075 |
75 |
157.0 |
150.0 |
75 |
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RNB2090 |
90 |
188.0 |
180.0 |
90 |
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RNB2110 |
110 |
221.0 |
215.0 |
110 |
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RNB2132 |
132 |
267.0 |
260.0 |
132 |
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RNB2160 |
160 |
309.0 |
305.0 |
160 |
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RNB2185 |
185 |
344.0 |
340.0 |
185 |
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RNB2200 |
200 |
384.0 |
380.0 |
200 |
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RNB2220 |
220 |
429.0 |
425.0 |
220 |
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RNB2250 |
250 |
460.0 |
480.0 |
250 |
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RNB2280 |
280 |
500.0 |
530.0 |
280 |
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RNB2315 |
315 |
580.0 |
600.0 |
315 |
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RNB2350 |
350 |
625.0 |
650.0 |
350 |
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RNB2400 |
400 |
715.0 |
720.0 |
400 |
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RNB2450 |
450 |
805.0 |
795.0 |
450 |
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RNB2500 |
500 |
848.0 |
860.0 |
500 |
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