Control Signal Input/Output Description; Input Signal - Fastech Ezi-Step BT-42 Series Operating Manual

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9. Control signal Input/Output Description

Input signals of the drive are all photocoupler inputs. The signal shows the status of in-

ternal photocouplers [ON: conduction], [OFF: Non-conduction], not displaying the voltage

levels of the signal.

CW(Pin:1,2), CCW(Pin:3,4)

CW, CCW Input

◆

This signal can be used to receive a positioning pulse command from a user-side host motion

controller. A user can select 1-pulse input mode of 2-pulse input mode. The input schematic

of CW, CCW is designed for 5V TTL level. When using 5V level as an input signal, the resistor

Rx is used and connect to the drive directly. When the level of input signal is more than 5V,

have to add Rx. If this resistor is absent, the inner schematic can be broken. In input signal

level is 12V case, Rx value is 680ohm and in 24V case, 1.8Kohm is suitable for Rx value.

Motor Free Input

◆

This input can be used only to adjust the position by manually moving the motor shaft from

the load-side. By setting the signal [ON], the drive cuts off the power supply to the motor.

Then, one can manually adjust output position. When setting the signal back to [OFF], the

drive resumes the power supply to the motor and recovers the holding torque. When driv-

ing a motor, one needs to set the signal [OFF]. In normal operations set the signal [OFF] of

disconnect a wire to the signal.

Alarm Reset

Input

◆

When a protection mode has been activated, a signal to this Alarm Reset input cancels the

Alarm output. By setting the alarm reset input signal [ON], cancel Alarm output. Before cancel

the Alarm output, have to remove the source of alarm.

[Caution] If Alarm Reset input signal still remains [ON], motor will be Free state. Keep in mind to change

[ON]→[OFF] state. It operates reversely compare to Normal mode, when you set inverse mode.

Alarm Reset(Pin:8)

21 - www.fastech.co.kr

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