From March 31st 2016, Motor controller [SC series] was end of product.

Appearance	Model Number	Control Axis	Motor Type of Built-in Driver	Run Current	Micro-Step Division	Computer Interface
	SC-021	2	5-phase stepper motor	0.35,0.75A/Phase	1/1~1/250 (16 types)	RS-232C
	SC-210	2		0.35~1.4A/Phase		RS-232C GP-IB
	SC-410	4

Replacing the backup battery of SC series

In the case of the SC series, a backup battery is used for keeping the system parameters when the power is off. If the system parameters cannot be kept in memory because of the battery degradation, the system of SC controller must reset at the start-up for using the controller normally.