Danfoss VLT2807 コンパクト周波数コンバータ

Typical Application Scenarios for ダンフォス VLT2807 (0.75 kW)

The VLT2807 is a small-size general-purpose open-loop V/F frequency converter. It supports Constant Torque (CT) / 可変トルク (VT) selection, built-in PID and AMA auto-adaptation. Compact side-by-side installation is supported. Mainly used for OEM equipment, HVAC-light-industry and assembly-line drives. Not suitable for high-precision vector control, heavy-shock loads or high-inertia lifting applications.

状態: 製造中止. Legacy compact general-purpose 周波数変換器, 0.75 kW, widely used for fans, パンプス, assembly lines and small-size drive equipment.

モデルのデコード (Full-model example: VLT2807PT4B20SBR1DBF12A00C1)

28: VLT2800 series

07: Power rating 0.75 kW / 1HP

P: Process variant

T: 三相入力

4: 380-480 VAC

B: Book-style construction, IP20

R1: Built-in Class A1 EMC filter; R0 = No EMC filter

D: No brake chopper; B = Built-in brake chopper

F12: LCP local control panel; F00 = Without panel

Example order number: 134H2368 (with EMC filter and control panel)

コアの電気仕様 (380-480 V version)

アイテム	仕様
定格電力	0.75 kW (1HP)
電源	3×380‑480 V ±10 %, 50/60 Hz
定格出力電流	4.2 あ
皮相電力	1.7 kVA
保護クラス	IP20
スイッチング周波数	4‑16 kHz adjustable
放熱	Cabinet mounting; maintain 100 mm clearance top and bottom
正味重量	約. 2.1 kg

A single-phase 220 V version VLT2807 (1×220-240 V) is also available, same 0.75 kW power rating, 4.2 A output current.

Hardware Interface Overview

Main-circuit Terminals

入力: L1, L2, L3; Motor output: U, V, W; PE protective earth; Brake resistor terminals (selected variants only)

Control Terminals (VLT2800 series)

デジタル入力: 18, 19, 27, 29, 33

Analogue inputs: 53 (電圧/電流), 60 (現在)

Analogue output: 42

RS485: 68/69 (Profibus-DP via optional expansion card)

サポートされている機能: Multi-speed, スタート/ストップ, PID, analogue reference, pulse reference, precision stop, auto-restart, AC braking.

主な特長
Quick Menu: Fast commissioning with 12 key motor-setup parameters; supports AMA motor auto-adaptation (Parameter P107).
V/F制御; selectable constant-torque / variable-torque mode; built-in PID for constant-pressure water-supply and fan applications.
Supports brake resistor and AC braking; fault auto-reset and auto-restart.
Optional Profibus-DP and DeviceNet fieldbus expansion cards.
LCP panel supports parameter copy for batch-unit commissioning.
Discontinued-product Replacement Solution

公式の直接交換品: VLT Midi Drive FC280, 0.75 kW, 380-480 V

Highly compatible mounting dimensions and terminal layout; plug-in terminals are reusable; parameters can be migrated.

Added Safe Torque-Off (STO) safety function with enhanced overall performance.

Alternative reference: FC-051 (エコノミータイプ, not direct terminal-compatible; requires full rewiring for retrofit).

一般的な故障コード

Err 8: DC-bus under-voltage. 入力電圧を確認してください, supply voltage drop or momentary power loss.

Err 1: 過電流; Err 4: 地絡; Err 14: 地絡; Err 16: 短絡; Err 29: 過熱.

Second-hand Unit Inspection Checklist
目視チェック: Swollen electrolytic capacitors, PCB corrosion, fan ageing.
Power-on without motor: Check for alarms; test all panel keys.
Run with small-size motor at no-load; verify three-phase output-voltage balance.
Verify power rating, presence of EMC filter and built-in brake chopper.
Back-up complete parameter set. Electrolytic capacitors are the main failure risk on this legacy series.
Variable-torque loads (ファン & パンプス, VT mode)

Torque decreases with speed; energy-saving operation; built-in PID for pressure/flow closed-loop regulation.

Small centrifugal fans: Workshop exhaust fans, cabinet cooling fans, air-handling-unit fans, small waste-gas-treatment fans.
Water-supply / 循環ポンプ: Small-scale constant-pressure water supply, cooling-water circulation pumps, metering pumps, process make-up pumps.
HVAC terminal-units and small-building ventilation systems.

✅ 利点: PID sleep-wake-up function; soft-start to minimise water hammer; prominent energy-saving effect.

Constant-torque loads (CT mode, 160 % overload for 1 min)

Torque remains largely independent of speed; sufficient starting-torque required. Mainly for assembly-line and light-industrial machinery.

Conveying equipment: Small belt conveyors, ローラーコンベア, chain conveyors, sorting-line equipment.
包装機械: Small packaging machines, sealers, ラベラー; precision-stop function for station positioning.
Mixing-stirring equipment: Small mixing tanks, blenders and agitators.
Light-industry & 繊維: Auxiliary drives for small-size unwinding/winding, textile-machinery and cutting equipment.
押し出し & small-process equipment: Micro-extruders, material feeders.

注記: For long-time operation below 10 Hz, standard-motor cooling deteriorates. Variable-frequency motor with separate cooling fan is recommended.

Ⅲ. Industry Sectors

空調設備: Fans and circulation pumps (most-common application).
包装 & light-industry OEM: Small-power drive units integrated into machinery.
水処理: Small-size water-supply and chemical-dosing metering pumps.
食べ物 & 飲み物: Small conveyors and agitators.
General-factory automation: Auxiliary drives for production-lines.
Unsuitable Operating Conditions
High-inertia hoisting / lifting machines (only permitted for light-duty auxiliary mechanisms, not for main lifting drives).
Applications requiring closed-loop vector control or high-dynamic-response servo-level performance.
Continuous heavy-duty operation with frequent shock-loading.
Long-term high-speed spindle operation above 400 Hz.
Configuration Tips for Typical Applications
ファン / ポンプ: Select R1 variant with built-in EMC filter; set P101 to Variable-Torque (VT).
コンベア / agitator: Requires high starting-torque; set P101 to Constant-Torque (CT). For frequent braking duty, select variant with built-in brake chopper (suffix-B in model code).
Fieldbus control: Add Profibus-DP option card for PLC interfacing.

Complete Technical Specifications of Danfoss VLT2807 (VLT2800 series)

状態: 製造中止. 0.75 kW, available in single-phase 220 V and three-phase 380-480 V versions.

Power-stage Electrical Parameters

① Three-phase 3×380-480 V (widely-used VLT2807PT4)

アイテム	仕様
モーター定格出力	0.75 kW / 1HP
Continuous rated output current Iinv	2.1 あ
60‑second overload current	3.3 あ (160 % overload for 1 min)
皮相電力	1.7 kVA
Input supply	3×380‑480 VAC ±10 %, 50/60 Hz
Rated input current	1.9 あ
60‑s maximum input current	3.0 あ
DC‑bus voltage range	540‑800 VDC

② Single-phase 1×220-240 V (VLT2807P1)

アイテム	仕様
モーター定格出力	0.75 kW / 1HP
Continuous rated output current Iinv	4.2 あ
60‑second overload current	6.7 あ (160 % overload for 1 min)
皮相電力	1.7 kVA
Input supply	1×220‑240 VAC ±10 %, 50/60 Hz
Rated input current	10.6 あ
60‑s maximum input current	16.7 あ
DC‑bus voltage range	280‑380 VDC

Overload rating: Constant-Torque (CT): 160 %, 60 s; Variable-Torque (VT): 110 % continuous.

パフォーマンスパラメータ

Control principle: Open-loop V/F control. User-programmable V/F curve; no closed-loop vector capability.

Output-frequency range: 0-1000 Hz; factory default 0-50 Hz.

Carrier switching frequency: 4-16 kHz adjustable, factory default 4 kHz. Current-derating applies at higher switching frequencies.

Motor auto-adaptation AMA: Static AMA supported (P107).

Acceleration / deceleration times: 0.05-3600 s; four independent ramp-time sets selectable.

PIDコントローラー内蔵: Closed-loop for fans/pumps; sleep-wake-up, ドライラン保護, no-flow detection.

Braking modes: AC-braking; optional built-in brake chopper (-B model suffix) for external brake-resistor; DC-bus paralleling for load-sharing.

Restart functions: Fault auto-reset & restart, flying-start, power-drop protection.

Ⅲ. Control-terminal Ratings

デジタル入力 (から: Terminals 18, 19, 27, 29, 33)

量: 5 デジタル入力; internal 24 V supply; compatible with NPN / PNP logic.

機能: スタートストップ, 前進/後進, マルチスピード, fault-reset, pulse reference, output-inhibit.

Analogue Inputs

Terminal 53: 0-10 V voltage / 0-20 ミリアンペア / 4-20 ミリアンペア, 設定可能.
Terminal 60: 4-20 mA current-input only.

Analogue Output (Terminal 42)

1 analogue output: 0-20 ミリアンペア / 4-20 mA programmable. May output frequency, output-current, output-voltage and other process variables.

リレー出力

1 リレー出力; contact rating AC250 V / 3 あ. Configurable for fault-signal, drive-running, frequency-reached and other status-signals.

通信インターフェース

標準: RS485 (Terminals 68/69), supports Modbus-RTU and Metasys-N2 protocols.
Optional expansion cards: プロフィバス-DP, デバイスネット (hardware option required).
機械式 & 環境仕様

アイテム	仕様
エンクロージャの種類	Book‑style, IP20; cabinet‑mount only
寸法 (高さ×幅×奥行き)	200 × 75 × 168 mm
正味重量	約. 2.1 kg (without panel); 2.2‑2.6 kg with panel+filter
取り付け	Vertical wall‑mount; side‑by‑side tight‑mount allowed; ≥100 mm vertical clearance top/bottom
Main‑circuit terminal torque	0.5‑0.6 Nm; PE‑earth terminal 2‑3 Nm
使用周囲温度	0‑50 °C; derating above 45 °C
保管温度	‑20 °C ~ +65 °C
高度	No derating ≤1000 m above sea‑level; derating required >1000 m
保護クラス	IP20; not for outdoor installation

Maximum Permissible Motor-cable Length

Unshielded cable: 200 m (with motor-reactor fitted).

Shielded cable: 100 m (with motor-reactor fitted).

R1 version (built-in A1-EMC filter): マックス. 50 m shielded cable.

R0 version (no built-in filter): マックス. 25 m shielded cable.

EMC & Safety Standards

R1 variant: Complies with EN55011 Class A1 (industrial EMC filter). R0: No internal filter.

承認: UL, CE. No built-in Safe-Torque-Off (STO) (STO introduced on successor FC280).

Ⅶ. Model-code Breakdown (VLT2807 full-model string)

VLT2807 P T 4 B 20 S B R1 D B F12 A00 C1

P = Process; T = Three-phase; 4 = 380-480 V; B = Book-style; 20 = IP20

R1 = Built-in A1-EMC filter; R0 = No filter

D = No brake chopper; B = Built-in brake chopper

F12 = With LCP keypad; F00 = Without keypad

VIII. Reference Order Numbers

VLT2807PT4B20SBR1DBF12A00C1 (with filter + panel): 134H2368

VLT2807PT4B20STR0DBF00A00C1 (no filter, no panel): 195N1013

Replacement-model Parameter Comparison

FC280 Midi Drive 0.75 kW, 380-480 V

Identical power rating; high terminal-hardware compatibility; STO safety-function integrated; standard RS485 Modbus. Direct hardware replacement for VLT2807.

Control Modes of Danfoss VLT2807

Parameter P100 (Configuration Mode) defines the high-level drive-operating mode. The underlying motor algorithm is fixed as open-loop V/F. Vector-control and field-oriented control are not supported.

Underlying Motor-control Algorithm
オープンループV/F (Voltage-to-Frequency) コントロール (only motor-control algorithm)

Selectable Constant-Torque (CT) / Variable-Torque (VT) via P101; custom V/F curve available.

Static AMA motor auto-adaptation is supported for motor-stator-voltage-drop compensation.

No encoder-based closed-loop speed-vector control; not for high-precision speed-regulation.

Four Operating-mode Settings of Parameter P100

P100 Value	Mode Name	説明	代表的な用途
0	Open‑loop speed control	V/F open‑loop; speed reference from external source; no feedback	ファン, パンプス, コンベア, general‑purpose speed‑regulation (most‑used setting)
1	Closed‑loop speed control	Hardware‑encoder interface is not available on VLT2807. This is a residual menu‑option and cannot be used in practical projects.	Encoder‑based closed‑loop speed‑control (not implementable on VLT2807)
2	Reserved	Spare setting	Not used
3	Process‑PID closed‑loop control	Built‑in PID controller, regulates against pressure/flow process‑feedback signal	Constant‑pressure water‑supply, constant‑air‑volume fans; pump‑sleep function available

✅ Practical field-usage: P100=0 Open-loop speed control and P100=3 Process-PID closed-loop control.

Ⅲ. Reference-source & Command-source Options

Local panel control (LCP keypad)

Parameter 002=1 LOCAL

スタートストップ, forward/reverse and frequency reference set via keypad buttons.

Used for commissioning and local manual operation of standalone units.

External-terminal remote control (Parameter 002=0 REMOTE)

① Analogue-reference speed setting

Terminal 53: 0-10 V / 0-20 ミリアンペア / 4-20 ミリアンペア; potentiometer-speed-setting.

Terminal 60: 4-20 mA current-input only.

Terminal 33 configurable as pulse-frequency reference, max. 67.6 kHz.

② Digital-terminal control

Multi-speed: Combinations of digital-input terminals, まで 8 preset fixed-speed setpoints.

Start-stop and direction: Terminal 18 for start, Terminal 19 for reverse.

Jog-function, precision-stop, fault-reset, output-inhibit.

Fieldbus communication control
Native RS485 (Terminals 68/69): Modbus-RTU, Metasys-N2. PLC controls start-stop, speed-reference and parameter-access.
Optional expansion cards: プロフィバス-DP / DeviceNet for bus-based command & reference.
Mixed-source control

Command-source and reference-source may differ. 例: Terminals for start-stop while bus provides frequency-reference; or bus for start-stop with potentiometer-analogue reference.

Braking Modes
AC-braking: Low-frequency AC excitation for fast deceleration; 追加のハードウェアは必要ありません.
DC-injection braking: DC injection to lock motor-shaft during stop; configurable braking-time and braking-voltage level.
Brake-chopper + brake-resistor (-B model suffix): Energy-dissipation braking for high-inertia regenerative-load applications.
Start-stop Logic Types
Ramp-start-stop: Smooth speed-ramp-up / ramp-down following acceleration-deceleration times.
Flying-start: Detect and synchronise to already-rotating motor speed.
Precision-stop: Counter-based stop for conveyor-station positioning.
Free-coast stop; Fast-stop OFF3.
Unsupported Control Functions

❌ No vector control (no VVC-plus, no flux-vector).

❌ No encoder-based closed-loop speed-control (no hardware encoder-interface).

❌ No positioning or servo-position-control.

❌ No Safe-Torque-Off (STO).

Typical Application-configuration Examples

General fan / conveyor speed-regulation: P100=0 Open-loop speed; terminal-start-stop + potentiometer reference on Terminal 53.
Constant-pressure water-supply pump: P100=3 Process-PID closed-loop; 4-20 mA pressure-transmitter connected to Terminal 60.
PLC fieldbus control: P100=0 Open-loop speed; RS485 Modbus-RTU; start-stop and speed-reference fully via bus.