BEM Models

Specifications

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BEM MODEL

[Specifications]

Model			BEM-2H		BEM-4H			BEM-2F
Input voltage	AC100V	± 10％ 50/60 Hz	●		●			●
	AC200V			●		●			●
	AC400V						●
	Maximum input voltage		AC250V		AC510V			AC250V
Rectification method	Rectification method		Half-wave rectification					Full-wave rectification
Output voltage			DC45V	DC90V	DC45V	DC90V	DC180V	DC90V	DC180V
Output current	When the ambient temperature is 20℃ Values in () are for an ambient temperature of 60℃		DC1.0A (DC0.6A)		DC1.0A (DC0.6A)			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)	90W (50W)	180W (100W)
Size setting	Voltage specification Numbers in parentheses are input voltages		DC45V (AC100V)	DC90V (AC200V)	DC45V (AC100V)	DC90V (AC200V)	DC180V (AC400V)	DC90V (AC100V)	DC180V (AC200V)
	●: Applicable △: Applicable depending on clutch/brake model	01	●	●	●	●	●	●	●
		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
Insulating resistance	Between terminal and body		1500 V AC, 50 Hz, 1 min.		2200 V AC, 50 Hz, 1 min.			1500 V AC, 50 Hz, 1 min.
Lead wire	UL style / Size		UL3398・AWG22		UL3271・AWG22			UL3398・AWG22
Usage environment	With no condensation		－15～＋60℃
Mass	Per product		0.020 kg		0.021 kg			0.023 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]

Use of both half-wave rectification and full-wave rectification

BEM-2H/4H 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 (BEM-2F types), smoothing supply, or a DC 24 V specification. BEM-2F types generate a full-wave rectified DC voltage. These power supply devices are known for having smaller voltage pulses than halfwave rectified supplies and tending to have little variation in electromagnetic clutch and brake operating response. [Method for Calculating Output Voltage] Output voltage = Input voltage × a (a set coefficient) * a (set coefficient) = 0.45: half-wave rectified/0.9: full-wave rectified (Ex.) BEM-2H, -4H: 200 V AC×0.45 = 90 V DC BEM-2F: 100 V AC×0.9 = 90 V DC Note that the electromagnetic clutches and brakes will not operate at the performance specified by the specifications unless the output voltage calculated above and the rated voltage for the electromagnetic coil are the same.