% & ( ( ) ( ( *+ % % %*% 1/4 BSD SERIES STEPPING MOTOR DRIVES 1. GENERAL CHARACTERISTICS BSD 02 - BSD 02.V V DC (V) from 22 to 50* with stabilized supply (+/- 5%) V DC (V) from 24 to 45 with unstabilized supply (+/- 20%) I min (A) 0.7 NP I max (A) 2.2 NP Dimensions (mm) 78 68 21 Operating temperature from + 5C to + 45C (see point 7.3) Table 1 Terms definition in Table 1 V Nominal value of DC voltage supply (range) at which the drive can operate. DC I Nominal phase current (peak value) which flows in each motor winding, measurable with motor turning at low NP speed (see Table 2). Automatic current reduction at motor standstill is 50% of value set. I min and max Minimum and maximum value of nominal phase current setting using DIP-SWITCH. NP (*) NOTE: Never use any power supply voltage higher than allowed one. 2. LOGIC INPUT AND OUTPUT SIGNALS (AM3 Connector, see Fig. 1, 2, 3, 4 and chap. 7.2) 2- CURRENT OFF INPUT: When this signal is HIGH, the drive is active. When it is LOW, the drive is inhibited, thus motor current (and so holding torque) is turned to zero. 3- STEP INPUT: Step is performed on HIGH to LOW transition of this signal. Suggested duty-cycle: 50%. Max. frequency: 60 KHz with square wave signal supplied from a logic output at 5 volt. With duty cycle different from 50%, STEP signal half period has to be longer than 8 sec. 4- DIRECTION INPUT: With this signal HIGH motor rotation direction is opposite to the one obtained with input LOW. This signal has to be valid at least 100 s before STEP signal and has to stay in this state for at least 100 s after last step sent to the drive. 5- DRIVER FAULT OUTPUT: When drive is normally working, this output is SHORTED to GND when drive is in no-working state, the output is OPEN. The drive automatically goes in no-working state when some protection is active and automatically recovers when the protection resets. 1 and 6- INTERNAL GND: The terminals are internally connected between each others and to terminals 10 (the power supply common), 11 and 16. They can be used to connect the shield of logic signal cable (this is mandatory or useful depending on type of control system). SIMPLIFIED INPUT STRUCTURE SIMPLIFIED OUTPUT STRUCTURE R1 = 10 KOHM R2 = 3.3 KOHM +V =5V DC C = 220 pF for STEP input UP OUTPUT R1 = 22 KOHM DO R2 = 6.8 KOHM (max 50 Volt - 10 mA) C = 2.2 nF for DIRECTION input R2 GND R1 = 22 KOHM R2 = 6.8 KOHM INPUT C = 47 nF Vmax = 50 Volt R1 for CURRENT OFF Vin Imax = 10 mA input DRIVE INTERNAL CIRCUIT Vsat 0.8 Volt 0 Vin nom = 5 Volt Vin max = 24 Volt DRIVE INTERNAL CIRCUIT Fig. 1 a Fig. 1 b R.T.A. s.r.l. - Via E. Mattei Fraz. Divisa 27020 Marcignago (PV) Tel. +39.0382.929.855 - Fax +39.0382.929.150