BEW Models

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Features of BEW Models

These are basic models of power supplies for controlling electromagnetic clutches and brakes with rated voltages of 45 V DC/90 V DC/180 V DC. The direct current required to operate electromagnetic clutches and brakes can be obtained simply by connecting/inputting using 100 V AC, 200 V AC, or 400 V AC specifications.Power supplies are available with a variety of specifications, including half-wave rectified and full-wave rectified, and are compact and lightweight as well. These are of the terminal block type, which allows easy connection to wiring, with a DC switching terminal.

BEW Models Specifications

BEW Models

[Specifications]

Model	BEW-2G	BEW-4G	BEW-1R	BEW-2R	BEW-4R
Input voltage	AC100V	± 10％ 50 Hz/60 Hz	●		●			●	●
AC200V		●		●				●	●
AC400V					●					●	●
Input voltage range	AC 280 V max.	AC 480 V max.	AC90 ～ 140V	AC180 ～ 280V	AC360 ～ 480V
Rectification method	Half-wave rectification	For both half- and full-wave rectification
Half-wave	Full-wave	Half-wave	Full-wave	Half-wave	Full-wave
Output voltage	DC45V	DC90V	DC45V	DC90V	DC180V	DC45V	DC90V	DC90V	DC180V	DC180V	DC360V
Output current	When the ambient temperature is 20℃ values in () are for an ambient temperature of 60℃	DC1.0A (DC0.7A)	DC1.0A(DC0.7A)	DC2.0A (DC1.5A)	DC1.0A(DC0.7A)	DC0.7A (DC0.5A)
Output Wattage	When the ambient temperature is 20℃ values in () are for an ambient temperature of 60℃	45 W (25 W)	90 W (50 W)	45 W (25 W)	90 W (50 W)	180 W (100 W)	90 W (50 W)	180 W (100 W)	90 W (50 W)	180 W (100 W)	126 W (90 W)	252 W (180 W)
Size settings	Voltage specifications Numbers in parentheses are input voltages	DC45V (AC100V)	DC90V (AC200V)	DC45V (AC100V)	DC90V (AC200V)	DC180V (AC400V)	DC45V (AC100V)	DC90V (AC100V)	DC90V (AC200V)	DC180V (AC200V)	DC180V (AC400V)	DC360V (AC400V)
●: Applicable △: Applicable depending on clutch/brake model	01	●	●	●	●	●	●	●	●	●	●
02	●	●	●	●	●	●	●	●	●	●
03	●	●	●	●	●	●	●	●	●	●
04	●	●	●	●	●	●	●	●	●	●
05	●	●	●	●	●	●	●	●	●	●
06	●	●	●	●	●	●	●	●	●	●
08	●	●	●	●	●	●	●	●	●	●
10	●	●	●	●	●	●	●	●	●	●
12		●		●	●		●	●	●	●
14		●		●	●		●	●	●	●
16		●		●	●		●	●	●	●
18		△		△	●		●	△	●	●
20		△		△	●		●	△	●	●
25		△		△	●		●	△	●	●
Applicable clutches/brakes	Miki Pulley Clutches & Brakes, Rated voltage: DC 45/90/180 V	Spring-actuated brake	All
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.	1500 V AC, 50 Hz, 1 min.	2000 V AC, 50 Hz, 1 min.
Usage environment	With no condensation	－20℃ to ＋60℃
Mass	Per product	0.04 kg

Model

BEW-2G

BEW-4G

BEW-1R

BEW-2R

BEW-4R

Input voltage

AC100V

± 10％ 50 Hz/60 Hz

●

AC200V

●

AC400V

●

Input voltage range

AC 280 V max.

AC 480 V max.

AC90 ～ 140V

AC180 ～ 280V

AC360 ～ 480V

Rectification method

Half-wave rectification

For both half- and full-wave rectification

Half-wave

Full-wave

Half-wave

Full-wave

Half-wave

Full-wave

Output voltage

DC45V

DC90V

DC45V

DC90V

DC180V

DC45V

DC90V

DC180V

DC360V

Output current

When the ambient temperature is 20℃ values in () are for an ambient temperature of 60℃

DC1.0A (DC0.7A)

DC1.0A(DC0.7A)

DC2.0A (DC1.5A)

DC1.0A(DC0.7A)

DC0.7A (DC0.5A)

Output Wattage

When the ambient temperature is 20℃ values in () are for an ambient temperature of 60℃

45 W
(25 W)

90 W
(50 W)

45 W
(25 W)

90 W
(50 W)

180 W
(100 W)

90 W
(50 W)

180 W
(100 W)

90 W
(50 W)

180 W
(100 W)

126 W
(90 W)

252 W
(180 W)

Size settings

Voltage specifications Numbers in parentheses are input voltages

DC45V
(AC100V)

DC90V
(AC200V)

DC45V
(AC100V)

DC90V
(AC200V)

DC180V
(AC400V)

DC45V
(AC100V)

DC90V
(AC100V)

DC90V
(AC200V)

DC180V
(AC200V)

DC180V
(AC400V)

DC360V
(AC400V)

●: Applicable
△: Applicable depending on clutch/brake model

●

△

●

△

●

△

●

△

●

△

●

△

●

Applicable clutches/brakes

Miki Pulley Clutches & Brakes, Rated voltage: DC 45/90/180 V

Spring-actuated brake

All

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.

1500 V AC, 50 Hz, 1 min.

2000 V AC, 50 Hz, 1 min.

Usage environment

With no condensation

－20℃ to ＋60℃

Mass

Per product

0.04 kg

[Dimensions]

[Structure]

[Terminals and Functions]

Model	Terminal symbol	Terminal name	Function description
BEW(G)	1-2	Power supply input terminal	Connector for a commercial power supply
2-3	Control terminal	Output is controlled by opening and closing between terminals with a relay or other contact
3-4	Output terminal	Connector for an electromagnetic clutch or brake
BEW(R)	1-2	Power supply input terminal	Connector for a commercial power supply
2-4	Output terminal (half-wave)	Connector for an electromagnetic clutch or brake (when half-wave rectified)
3-4	Output terminal (full-wave)	Connector for an electromagnetic clutch or brake (when full-wave rectified))

Model

Terminal symbol

Terminal name

Function description

BEW(G)

1-2

Power supply input terminal

Connector for a commercial power supply

2-3

Control terminal

Output is controlled by opening and closing between terminals with a relay or other contact

3-4

Output terminal

Connector for an electromagnetic clutch or brake

BEW(R)

1-2

Power supply input terminal

Connector for a commercial power supply

2-4

Output terminal (half-wave)

Connector for an electromagnetic clutch or brake (when half-wave rectified)

3-4

Output terminal (full-wave)

Connector for an electromagnetic clutch or brake (when full-wave rectified))

[Characteristics]

Output type

Two systems are available, half-wave rectified and full-wave rectified. Half-wave rectified takes a commercial power supply as the input and generates a halfwave 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, smoothing supply, or a DC 24 V specification.
Full-wave rectified power supply devices are known for having smaller voltage pulses than half-wave rectified supplies and tending to have little variation in electromagnetic clutch and brake operating response. They can thus be used not just for spring-actuated brakes but also for electromagnetic-actuated clutches and brakes.
Note that when the rated voltage of the electromagnetic coil does not match the voltage output from the power supply device, you will not be able to obtain the electromagnetic clutch/brake characteristics given in the specifications.

[Wiring Methods and Timing Charts]

BEW(G)　Secondary Control (Basic Wiring)