NDC06.V

% & ( ( ) ( ( *+ % % %*% 1/8 NDC SERIES STEPPING MOTOR DRIVES 1) GENERAL CHARACTERISTICS NDC 04 NDC 06 NDC 94 NDC 96 NDC NDC 04.V NDC 06.V from 24 to 75 from 24 to 75 from 24 to 75 from 24 to 75 Vnom (V) DC 0.65 1.9 0.65 1.9 I min (A) NP I max (A) 2 6 2 6 NP Dimensions (mm) 93.5 101 25 110 108 34 Operating temperature from + 5C to + 45C (see point 7) Table 1 Terms definition in Table 1 V nom Nominal value of DC voltage supply (range) at which the drive can operate without stabilized DC supply. I Nominal phase current (peak value) which flow in each motor winding, measurable with motor NP turning at low speed. This current can be selected by user among eight different values using DIP-SWITCHES. Automatic current reduction at motor standstill is 50% of value set using DIP- SWITCHES. I min and max Minimum and maximum value of nominal phase current setting. NP 2) LOGIC INPUT AND OUTPUT SIGNALS (connectors AM3 or C2, see Fig. 1, 7, 9 and 10) All inputs and outputs are optically insulated (mutually and respect to internal power circuit). For all inputs and outputs you have both positive and negative terminal. The input corresponding to 6 and 7 terminals has different function in STEP operation mode and in RUN operation mode (set using OS jumper). Driving an input with a slow signal (i.e. relays) or with variable delay (i.e. PLC output) can give precision problem or, worse, make the board do not work at all. If you have this type of signal, contact R.T.A. 2(-) 3(+) CURRENT OFF INPUT: When this signal is ON drive is active. When it is OFF drive is inhibited, thus motor current (and so holding torque) is turned to zero. With jumper CO this input is always ON (drive is always active). 4(-) 5(+) DIRECTION INPUT: With this signal ON motor rotation direction is opposite to the one obtained with input OFF. This signal has to be valid at least 100 sec. before STEP signal (or ENABLE signal) and has to stay in this state for at least 100 sec. after last step sent to the drive (or ENABLE input disabled). 6(-) 7(+) STEP INPUT (STEP operation mode): Step is performed on ON-OFF transition of this signal. Suggested duty-cycle: 50%. Max. frequency: 150 KHz with square wave signal supplied from a source with voltage between 3.5 and 13 Volt. In any case STEP signal half period has to be higher than 3 sec. ENABLE INPUT (RUN operation mode): When this signal is ON, motor rotate in the direction set by DIRECTION signal. When this signal is OFF the motor stops and after adjustment it keeps the load blocked with the torque at 50% of the set value (automatic current reduction). The maximum delay at enabling or disabling is lower than 1.5 millisec. In case a revolution time lower than 20 millisec is needed. command circuit has to be realized very carefully and thus it is suggested to contact RTA. 8(-) 9(+) DRIVER FAULT OUTPUT: When this output is SHORTED, drive is normally working when it is OPEN drive is in no-working state. Drive automatically goes in no-working state when some protection is active and automatically recovers when the protection resets. 1 10 INTERNAL GND: (internally interconnected and connected to terminals 12, 13 and 18). Galvanically insulated from logic inputs and outputs and connected to power supply common. They can be used to connect the shield of logic signal cable (if that is mandatory or useful depending on type of control system). R.T.A. s.r.l. - Via E. Mattei Fraz. Divisa 27020 Marcignago (PV) Tel. +39.0382.929.855 - Fax +39.0382.929.150