Detailed Product Description of SEW BST0.7S-400V

SEW BST0.7S-400V (complete model: BST0.7S-400V-00, part number: 13000772) is an original SEW safety type motor braking rectifier module, specifically designed to provide a DC control power supply for the electromagnetic brake of 400V AC motors. It features safety shutdown, overvoltage protection, and fast response characteristics, and is widely used in the safety braking systems of motor-driven systems driven by frequency converters. 

I. Basic Information

Product Series: BST Series Safety Brake Rectifier Module

Full Model: BST0.7S-400V-00

Material Number: 13000772

Product Type: Safety Brake Rectifier (Electromagnetic Brake Rectifier)

Applicable Motors: SEW 400V AC Series Brake Motors (DR/DV/DT series with BE/BG/BR electromagnetic brakes)

Installation Method: Control Cabinet Rail Installation (DIN Rail)

Protection Grade: IP20 (Internal Module, Installed Inside the Cabinet)

Weight: Approximately 0.8 kg

Size: Approximately 110 × 60 × 80 mm

II. Model Meaning Explanation

BST: Brake Safety Module (Safety Type Brake Module)

0.7: Rated Output Current 0.7 A

S: Standard Type (Standard)

400V: Input AC Voltage 400V AC

00: Standard Version (No Additional Interfaces)

III. Core Technical Parameters

1. Electrical Parameters

Input Voltage: 3×400V AC (Three-phase 380–415V)

Input Frequency: 50/60 Hz

Output Voltage: DC Brake Voltage (Approximately 180–200V DC, Compatible with BE Brakes)

Rated Output Current: 0.7 A

Maximum Braking Power: Approximately 140 W (Compatible with 0.7A Class Brakes)

DC Bus Range: 350–750V DC (Frequency Converter Drive Compatible)

Control Input: 24V DC Logic Control (Safety Shutdown)

Safety Level: EN ISO 13849-1 PL d / Cat.3 (Safety Brake Control)

Switching Frequency: ≤ 120 times / Minute (Frequent Braking Compatible) SEW-EURODRIVE

2. Functional Characteristics

Rectification Method: Three-phase Full Wave Rectification + Electronic Voltage Stabilization

Safety Shutdown: Dual Independent Shutdown Circuits (Safety Brake Command)

Overvoltage Protection: Built-in DC Bus Overvoltage Suppression (350–750V DC)

Overload Protection: Overcurrent / Short Circuit Automatic Cut-off Output

Response Time: ≤ 10 ms (Brake Rapid Response) SEW-EURODRIVE

Anti-interference: EMC Filtering, Industrial-grade Noise Resistance

Status Indicators: LED Operating / Fault Indicator Lights

3. Interface Definitions (Standard Terminals)

L1/L2/L3: Three-phase 400V AC Input

PE: Protective Ground

BR+/BR-: Brake DC Output

IN1/IN2: 24V DC Safety Control Input (Enable / Shutdown)

OUT1/OUT2: Status Output (Operation / Fault)

IV. Functions and Advantages

1. Safety Brake Control

PL d Safety Level: Meets Mechanical Safety Standards (EN ISO 13849-1)

Dual Path Shutdown: Independent Control Circuits, Prevents Single Point Failure

Quick Shutdown: Immediately Cut Off Brake Power in Emergency Stop

2. Stable and Reliable

SEW Original Matching: Perfectly Compatible with SEW BE/BG Series Brakes

Full Wave Rectification: Output DC Smooth, No Ripple, Brake Stable

Wide Voltage Compatibility: 380–415V AC Input, Compatible with Grid Fluctuations

Long Life: No Mechanical Contacts, Electronic Solid State Design

3. Installation Convenient

DIN Rail: Standard Control Cabinet Quick Installation

Plug-in Terminals: Simple Wiring, Easy Maintenance

Compact Volume: Saves Cabinet Space

4. Applicable Scenarios

Frequency Converter Motor Drive: Synchronous Brake Control

Lifting / Hoisting Equipment: Safety Brake Control Machine tools / Conveyor belts: Frequent start-stop braking

Packaging / Printing machinery: High-precision positioning braking

V. Typical Applications

Compatible brakes: SEW BE2A, BE2B, BG2, BR2 series (400V AC)

Motor power: 0.25–7.5 kW (400V brake motor)

System configuration: Frequency converter + BST0.7S + Brake motor (safety closed loop)

VI. Selection and Installation Tips

Current matching: Brake current ≤ 0.7 A (no overload allowed)

Safety wiring: IN1/IN2 must be connected to safety relays (PL d requirement)

Heat dissipation: Cabinet ventilation, ambient temperature -10°C ~ +40°C

Grounding: Reliable PE grounding (EMC and safety)

VII. Order Information

Model: BST0.7S-400V-00

Part number: 13000772

Standard configuration: Module body, DIN rail clip, terminal block

Warranty: 12 months (industrial standard)

VIII. Comparison within the Series

BST0.7S-400V: 0.7A, 400V, standard safety type

BST1.2S-230V: 1.2A, 230V, suitable for small power brakes

BGE/BME: Non-safety type rectifiers (low cost) SEW-EURODRIVE