Miki Pulley BEM-T Types
Specifications
| Model | BEM-2T | BEM-4T | |||||
|---|---|---|---|---|---|---|---|
| Input voltage | AC100V | ± 10％ 50/60 Hz |
● | ● | |||
| AC200V | ● | ● | |||||
| AC400V | ● | ||||||
| Maximum input voltage | AC280V | AC480V | |||||
| Rectification method | Half-wave rectification | ||||||
| Output voltage | DC45V | DC90V | DC45V | DC90V | DC180V | ||
| Output current | When the ambient temperature is 20℃ Values in parentheses are for an ambient temperature of 60℃ | DC1.0A (DC0.6A) | DC0.7A (DC0.5A) | ||||
| 45W (25W) | 90W (50W) | 30W (20W) | 60W (40W) | 125W (90W) | |||
| Size setting | Voltage specifications Figures in parentheses are input voltages | DC45V (AC100V) | DC90V (AC200V) | DC45V (AC100V) | DC90V (AC200V) | DC180V (AC400V) | |
| ●: Applicable △: Applicable depending on clutch or brake model | 01 | ● | ● | ● | ● | ● | |
| 02 | ● | ● | ● | ● | ● | ||
| 03 | ● | ● | ● | ● | ● | ||
| 04 | ● | ● | ● | ● | ● | ||
| 05 | ● | ● | ● | ● | ● | ||
| 06 | ● | ● | ● | ● | ● | ||
| 08 | ● | ● | ● | ● | ● | ||
| 10 | ● | ● | ● | ● | ● | ||
| 12 | ● | ● | ● | ||||
| 14 | ● | △ | ● | ||||
| 16 | ● | △ | ● | ||||
| 18 | △ | △ | ● | ||||
| 20 | △ | △ | △ | ||||
| 25 | △ | △ | △ | ||||
| Applied clutches/brakes | MIKI PULLEY electromagnetic-actuated 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 | |||||
| Dielectric strength voltage | Between terminal and body | 1500 V AC, 50 Hz, 1 min. | 2000 V AC, 50 Hz, 1 min. | ||||
| Usage environment | With no condensation | －20℃ ～ ＋60℃ | |||||
| Mass | Per product | 0.008 kg | 0.011 kg | ||||
Dimensions
Structure
Terminals and Functions
| Terminal | Function name | Function description |
|---|---|---|
| Leads (two) | Input side | Connector for a commercial power supply |
| Tab terminals (two locations) | Output side | Connector for an electromagnetic clutch or brake |
Characteristics
Output System
BEM-2T/4T 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, compact size, 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 (BEM-2F 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.)
BEM-2T: AC200V × 0.45 = DC90V
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
