Miki Pulley BEW-S Types
Specifications
| Model | BEW-2S | BEW-4S | |||||
|---|---|---|---|---|---|---|---|
| Input voltage | 100 V AC | ± 10％ 50/60 Hz | ● | ● | |||
| 200 V AC | ● | ● | |||||
| 400 V AC | ● | ||||||
| Maximum input voltage | AC250V | AC250V | AC510V | AC510V | AC510V | ||
| Rectification method | Half-wave rectification | ||||||
| Output voltage | DC45V | DC90V | DC45V | DC90V | DC180V | ||
| Output current | When the ambient temperature is 20℃ values in () are for an ambient temperature of 60℃ | DC1.0A (DC0.6A) | |||||
| Output Wattage | When the ambient temperature is 20℃ values in () are for an ambient temperature of 60℃ | 45W (25W) | 90W (50W) | 45W (25W) | 90W (50W) | 180W (100W) | |
| Size setting | Voltage specifications numbers in parentheses are input in voltages | DC45V (AC100V) | DC90V (AC200V) | DC45V (AC100V) | DC90V (AC200V) | DC180V (AC400V) | |
| ●: Applicable △: Applicable depending on clutch/brake model | 01 | ● | ● | ● | ● | ● | |
| 02 | ● | ● | ● | ● | ● | ||
| 03 | ● | ● | ● | ● | ● | ||
| 04 | ● | ● | ● | ● | ● | ||
| 05 | ● | ● | ● | ● | ● | ||
| 06 | ● | ● | ● | ● | ● | ||
| 08 | ● | ● | ● | ● | ● | ||
| 10 | ● | ● | ● | ● | ● | ||
| 12 | ● | ● | ● | ||||
| 14 | ● | ● | ● | ||||
| 16 | ● | ● | ● | ||||
| 18 | △ | △ | ● | ||||
| 20 | △ | △ | △ | ||||
| 25 | △ | △ | △ | ||||
| Applied clutches/brakes | MIKI PULLEY electromagneticactuated clutches and brakes Rated voltage DC 45/90/180 V | Spring-actuated brake | |||||
| Insulating resistance | Between terminal and body | DC 500 V, 100 M Ω with Megger | |||||
| 1000 V AC, 50 Hz, 1 min. | 2000 V AC, 50 Hz, 1 min. | ||||||
| Usage environment | With no condensation | －20℃ to ＋60℃ | |||||
| Mass | Per product | 0.021 kg | |||||
Dimensions
Structure
Terminals and Functions
| Terminal symbol | Terminal name | Function description |
|---|---|---|
| 1-2 | Power supply input terminal | Connector for a commercial power supply |
| 3-4 | Output terminal | Connector for an electromagnetic clutch or brake |
Characteristics
Output type
BEW-2S/4S types take a commercial power supply as the input and generate a half-wave rectified DC voltage on the output side. These power supply devices are known for their very simple construction and low cost, but their voltage pulse is large. They are therefore prone to generating variations in operating response in electromagnetic clutches and brakes, they produce a howling noise when conducting, and they tend to generate more heat from their electromagnetic coils than full-wave rectified supplies or smoothing supplies.
When the above are to be avoided, consider changing to a full-wave rectified supply (BEW-R types), smoothing supply, or a DC 24 V specification.
How to Calculate Output Voltage
Output voltage = Input voltage × a (a set coefficient)
* a (set coefficient) = 0.45: half-wave rectification
(Ex.)
BEW-2S: AC100V × 0.45 = DC45V
BEW-4S: AC400V × 0.45 = DC180V
Note that when the rated voltage of the electromagnetic coil does not match the output voltage calculated above, you will not be able to obtain the electromagnetic clutch/brake characteristics given in the specifications.
Wiring Methods and Timing Charts
Primary Control
Secondary Control
