Setting the Terminal Block for Safety Contact Output (TBSTO)

The safety controller supplies a dual relay contact output signal for safety purposes. If the robot is at power cut stop (STO: Safe Torque Off) status, each dual contact opens. If the robot is supplied with operating power (Ready, Run, Jog, etc.), each dual contact closes.

While the output value of the two contacts must be identical, different output values may be generated when open/close takes place. If the output values of the two contacts are longer than the times in the table below, assume connection shortage and hardware defect of the connected external device, and perform inspections. The rated voltage/current of the safety controller relay connected to the contact output terminal is 250VAC/6A.