WashiON KYORITSU KEIKI CM2 Type DC Contactors

Manufacturer: WashiON KYORITSU KEIKI
Model: CM2

Features

Supports forward and reverse switching of DC motors.
Enables speed control for DC motors.
Ideal for battery-powered vehicles such as:
Forklifts
Lift pallet vehicles
Fixed platform trucks

Main contact rated voltage		DC 48V
Main contact rated current		20A continuous
Main contact arrangement		1A
Main contact capacity	Condition	Making	Breaking	Time constant	No. of times
	Make & break capacity	150 A	150 A	L / R = 15 ms	125 times
	Rated working current ^※1	80 A	20 A	L / R = 10 ms	500,000 times
Switching frequency		1200 times / hour
Coil	Voltage	DC 12V	DC 24V	DC 48V
	Current	0.7 A	0.36 A	0.18 A
	Resistance	17.2 Ω	66.6 Ω	266.6 Ω
	Power consumption	8.5 W
	Insulation class	B class
Min. pickup voltage		70% or below of rated voltage (hot coil)
Release voltage		5% ~ 30% of rated voltage
Insulation resistance		5MΩ or above (DC500V megger)
Withstand voltage		AC 1500V 50 / 60 Hz One minute
Ambient temperature		−20°C ~ +60°C (no condensation)
Relative humidity		45% ~ 85% RH
Vibration resistance (X, Y, Z directions)		5G in excited state		4G in non-excited state
Shock resistance (X, Y, Z directions)		8G in excited state		4G in non-excited state
Mechanical life		5 million times
Electrical life		500,000 times (when used under condition of ※1)
Weight		0.25 kg

[*1]The current and resistance values of the coil represent those at an ambient temperature of +20°C, and the tolerance on them is ±10%.
[*2]The minimum pickup voltage represents that at an ambient temperature of +60°C and hot coil start.

■Relationship Between Current, Max. On Time And Duty Cycle

Duty cycle	5% ED	10% ED	25% ED	50% ED	75% ED	100% ED
Current	70 A	50 A	40 A	35 A	28 A	20 A
Max. ON time	30 sec	60 sec	120 sec	180 sec	360 sec	Continuous
OFF time	570 sec	540 sec	360 sec	180 sec	120 sec	—

[*1]Use 11 to 14 kg·cm as the tightening torque of the main circuit terminal (M4).
[*2]Connect the positive pole (+) to the terminal marked with the main circuit polarity marking P.
(The contactor structure is such that arc is led out front by a built-in magnet.)
[*3]Install the DC contactor with the UP side up.
[*4]Provide a space of 10 mm or more between contactors when two or more contactors are to be installed side by side.