Description
The SCF series of frequency inverters are compact micro-drives engineered by Lenze Americas to provide precise control for AC motors. Multiple models supporting output power between ¼ HP to 30 HP are available in the SCF series. It is an ideal component for new or existing motor driven applications.
The SCF series microdrives are designed to meet the IP20 rating for protection against solid objects up to a diameter of 12mm. It has a neatly arranged panel layout that features input power terminals, electronic program module, programming buttons, 3-Digit LED display, control terminal strip, DC bus terminals, and motor output terminals.
System integrators can easily connect to the terminals of the SCF series that are clearly labeled for start/stop, analog input, digital inputs, and outputs. The SCF range of frequency inverters also supports Modbus, a standard industry protocol on 2-Wire RS485 cable. This makes configuration and control of the frequency inverter possible on remote stations.
Applications that require fast stopping or deceleration feature will find the packaged dynamic brake solution handy for ease of implementation. While the SCF inverters are easy to install, they must be done with care if the system is to comply with EMC requirements.
Technicians and support personnel will find the visual controls and indicators handy in setting up and commissioning the unit. Besides setting key parameters such as minimum frequency, and acceleration time, the LED display also returns error messages to aid troubleshooting efforts.
A quick summary of SCF series frequency inverters.
- Output power: ¼ HP to 30 HP (0.18 to 22 kW).
- Frequency inverter in IP20 with V/f Control
- Connections: start/stop, analog input, digital inputs and outputs (5/2)
- Serial Communications: 2-Wire RS-485 Modbus RTU.
- Packaged Dynamic brake option includes control and resistors in an easy-to-implement solution for fast stopping or deceleration requirements
Technical documentation for the SCF Series Drive, and all AC Tech brand drives, is available in our
Technical Library.
SF230 SCF Series Features
1. SF230 SCF Series Communication
The SCF series frequency inverters support standard Modbus protocol over the RS485 wired connection. It is set to operate in slave mode on a 9600 baud rate. This allows a control station to remotely configure and monitor the operation of the SCF series frequency inverters. Each of the drives can be configured with a specific address between 1-247, although only 32 devices (including the master) can be supported in the conventional RS485 network.
2. SF230 SCF Series Electronic Programming Module
The Electronic Programming Module or EPM is a functional module that stores operational parameters and custom settings. It is placed on the main control board of the drive. This special module helps can be removed from the existing control board and fixed onto a replacement board to ensure it operates with the existing configurations.
3. SF230 SCF Series Fault Troubleshooting
All of the SCF series frequency inverters are built with safety in mind. In the cause of a fault condition, in the event of a FAULT, the drive can be programmed to restart where 3 attempts will be made. If the condition that triggers the FAULT persist, the drive will place itself into a FAULT LOCKOUT mode and can only recover once the fault condition is resolved and drive manually reset.
SF230 Other SCF Series Features
1. SF230 Input Voltage Ratings
- SF200 Series drives are rated for 208/240 Vac, three phase, 50-60 Hz input
- SF200Y Series drives are rated for 208/240 Vac, single or three phase, 50-60 Hz input
- SF400 Series drives are rated for 400/480 Vac three phase, 50-60 Hz input.
- SF500 Series drives are rated for 480/590 Vac, three phase, 50-60 Hz input
2. SF230 Specifications
- Storage Temperature : -20° to 70° C
- Ambient Operating Temperature: 0° to 50° C (derate 2.5% per °C above 50°)
- Ambient Humidity :< 95% (non-condensing)
- Maximum Altitude : 3300 ft (1000 m) above sea level (derate 5% per additional 3300 ft)
- Input Line Voltages : 208/240 Vac, 400/480 Vac, 480/590 Vac
- Input Voltage Tolerance : +10%, -15%
- Input Frequency Tolerance : 48 to 62 Hz
- Output Wave Form : Sine Coded PWM
- Output Frequency : 0 - 240 Hz (consult factory for higher output frequencies)
- Carrier Frequency : 4 kHz to 10 kHz (over 6 kHz requires derating; see parameter P02)
- Service Factor : 1.00 (up to 6 kHz carrier; derate above 6 kHz; see parameter P02)
- Efficiency : Up to 98% Power Factor (displacement) 0.96 or better
- Overload Current Capacity : 150% for 60 seconds, 180% for 30 seconds
- Speed Reference Follower : 0-10 VDC, 4-20 mA
- Control Voltage : 15 VDC
- Power Supply for Auxiliary Relays : 50 mA at 12 VDC
- Analog Output : 0 - 10 VDC or 2 - 10 VDC: Proportional to frequency and load
- Digital Outputs Open-collector outputs : 50 mA at 30 VDC
3. SF230 Installation For EMC Requirements
- Compliance with EN 61800-3/A11
- The input to the drive (or group of drives) must include a filter to reduce the electrical noise reflected back to the AC Line.
- Shielded cable must be used for all control and power cables and exposed wiring must be kept as short as possible.
4. SF230 Speed Reference Signals
- SPEED POT : Connect the wiper of a speed pot to terminal TB-5, and connect the high and low end leads to terminals TB-6 and TB-2, respectively. The speed pot can be 2.5kΩ up to 10kΩ.
- 0-10 VDC : Wire the positive to terminal TB-5 and the negative to terminal TB-2. TB-5 input impedance is 120 kilohms.
- 4-20 mA : Wire the positive to terminal TB-25 and the negative to terminal TB-2. TB-25 input impedance is 100 ohms.
Superior Drive Performance:
SF230 - Modes Of Operation:
- V / Hz (Constant or Variable)
SF230 - Performance Features:
- IP 20 enclosure with power terminals on top, motor terminals on the bottom
- Optional footprint filter
- 0-10 VDC or 4-20 mA speed reference
- Two open-collector outputs w/ internal power supply, can drive external relays
- Up to 8 selectable preset speeds
- Isolated start/stop plus 3 programmable inputs
- DC injection braking on stop (up to 1 hr)
- 2 analog outputs (speed & load)
SF230 - Drive Specifications:
- UL Approved Thermal O/L
- 8 Preset Speeds
- 0 - 10 VDC, 4-20 mA Speed Reference
- DC Braking
- One Relay and Open-Collector Output
- 3 or more Programmable Inputs
- Fault History (Last 8)
- Programming via
- Drive Face
- Remote Keypad
- PC with TechLink
- EPM Programmer
- Isolated Control Terminals
- Highly visible 3 digit LED Display
- Quiet Motor Operation
- Forward / Reverse
- EPM
- Two Year Warranty
SF230 - Control Terminals:
- Digital Inputs (Active low, NPN):
- 1 Dedicated Stop
- 1 Dedicated Start
- 3 Programmable
- Digital Outputs:
- Analog Inputs:
- 1 voltage (0-10VDC)
- 1 current (4-20mA)
- Analog Outputs:
- 2 Outputs (0-10 VDC, 2-10 VDC can be converted to 4-20mA) proportional to speed and load
- Serial Communications:
- 2-Wire RS-485 Modbus RTU protocol for programming, monitoring and controlling
- Other:
- Speed Potentiometer Power Supply
- Signal Common
- 12 VDC 50 mA Supply
SF230 - Programmable Features:
- Carrier Freq. 4 – 10 kHz
- Independent Accel and Decel Ramps
- 2nd Accel / decal ramp
- Auxiliary Ramp to Stop
- 240 Hz Maximum Output Freq.
- DC Injection Braking
SF230 - Speed References:
- Keypad
- JOG (Fwd or Rev)
- Floating Point Control (MOP)
- 0-10 VDC Analog Reference (scalable)
- 4-20 mA Analog Reference (scalable)
- Potentiometer
- 8 Programmable Preset Speeds
- Modbus RTU Serial Speed Reference
SF230 - Popular Applications Include:
- Food Processing Machinery
- Packaging Machinery
- Material Handling Systems
- Conveyor Systems
- Pump Systems
- Fan Systems
- Milling Machines
- Hydraulic Systems
- HVAC Systems
- ... And many others!
SF230 - Global Standards:
- UL (North America)
- cUL (Canada)
- CE Low Voltage Directive (EN61800-5-1) (Europe)
- CE EMC Directive (EN61800-3)
SF230 - Environment:
- 0 to 40 Degrees Celsius
- Derate 2.5% per Degree Celsius above 40 Degrees Celsius
SF230 - Other Benefits And Features:
SF230 - Electronic Programming Module (EPM)
When you need to program or replace a drive, whether it is 1 or 100 drives, the Electronic Programming Module (EPM) gets it done simply, quickly and most important, accurately. There is no hassle of reconfiguring each parameter or resetting the drive to factory or user default settings. When drive reset is necessary, reset to factory default or customer settings in seconds with the EPM. When the EPM equipped drive is used on a line containing multiple drives with the identical setup, it takes just minutes to program the entire line. And EPMs can be replaced with or without power connected. When a drive must be replaced, the parameter configuration is not lost, simply plug in the pre-programmed EPM. You are good to go with Ever Present Memory.
