Bose MR-J2S- B instruction manual Characteristics

11.CHARACTERISTICS

11.CHARACTERISTICS

11.1 Overload protection characteristics

An electronic thermal relay is built in the servo amplifier to protect the servo motor and servo amplifier from overloads. The operation characteristics of the electronic thermal relay are shown Fig 11.1 to 11.3. Overload 1 alarm (50) occurs if overload operation performed is above the electronic thermal relay protection curve shown below. Overload 2 alarm (51) occurs if the maximum current flew continuously for several seconds due to machine collision, etc. Use the equipment on the left-hand side area of the continuous or broken line in the graph.

In a machine like the one for vertical lift application where unbalanced torque will be produced, it is recommended to use the machine so that the unbalanced torque is 70% or less of the rated torque.

(1) MR-J2S-10B to MR-J2S-100B

HC-KFS series HC-MFS series HC-SFS series HC-UFS series

1000
						During rotation
100
time[s]			During servo lock
Operation	10
	1
	0.1
	0	50	100	150	200	250	300

Load ratio [%]

Fig 11.1 Electronic thermal relay protection characteristics 1

(2) MR-J2S-200B to MR-J2S-350B

HC-SFS series HC-RFS series HC-UFS series

1000
						During rotation
100
time [s]			During servo lock
Operation	10
	1
0.1
	0	50	100	150	200	250	300
				Load ratio [%]

Fig 11.2 Electronic thermal relay protection characteristics 2

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