Servo Drives New Generation

Characteristics of the Servo Drives New Generation

Digital servo drives for AC servo motors and direct drives (torque motors, linear motors)
Compact drives for control cabinet installation, complete with built-in power supply for direct connection to 230 V~ AC (size 1) or 3×400/480 V~ AC (size 2 and 3) (wide-range inputs)
Integrated safety system, wear-free, two-channel (PL e according to ISO 13849-1 and SIL 3 according to IEC 61800-2)
Design conforms to EMC requirements (CE marked; class A standard, class B through accessories)
Switching frequency 8 or 16 kHz selectable for optimum dynamic characteristics and small motor power loss
High dynamics and control quality through signal processor for digital control of current and speed (controller cycle time 62.5 µs)
Position control loop (32-bit FP microcontroller, cycle time 1 ms) integrated, setting the target positions via communication interfaces (standard) or positioning control with 500 blocks (option)
Rapid acceleration, deceleration, and reversing of the motor by momentary current increase to up to three times the rated current
High processor power for fast axis control and communication
Extensive technology functions, positioning control as an option
8 digital inputs, 4 digital outputs, additionally 2 analog inputs and 2 analog outputs (partly optional)
Communication via USB (standard) or EtherCAT, CANopen, Profinet, CAN, Modbus/TCP, or serial RS485, RS232 (e. g. Modbus RTU) according to CANopen profile CiA 402
Universal motor position sensor connector for resolver or absolute and incremental encoders with Hiperface, EnDat, or BiSS interface
Easy wiring, since all connections can be plugged in at the front and at the top (partly also at the bottom)
Comfortable commissioning and diagnosis using a personal computer
Function blocks for the development of customized application programs and easy integration in automation systems available

Data Sheet 6770.250 – Servo Drives New Generation

Order number	BN 6771	BN 6772	BN 6773	BN 6774 *
Rated supply voltage	230 V~ ±10%, 50 .. 60 Hz
Rated DC-bus voltage	320 V DC
Permissible supply voltage	85 .. 253 V~ (corresponds to 115 .. 340 V DC-bus voltage)
Rated current (rms value)	0.8 A	2 A	4 A	6 A
Peak current (crest value)	3.4 A	8.5 A	17 A	25.5 A
for AC servo motors	up to 0.5 Nm rated torque	up to 1.5 Nm rated torque	up to 3.5 Nm rated torque	up to 5.5 Nm rated torque
Switching frequency	8 or 16 kHz (to be selected)
Control supply voltage	24 V DC ±20%, 0.8 A
Dimensions w×h×d	70 × 195 × 200 mm (size 1)

* BN 6774 (6 A device) servo drives may be operated up to a loading of 70% without restrictions. For a higher loading, the device must be installed next to a control cabinet fan or equipped with a sub-assembled fan.

Order number	BN 6781	BN 6782	BN 6783 *	BN 6785	BN 6787 *
Rated supply voltage	3×400/480 V~ ±10%, 50 .. 60 Hz
Rated DC-bus voltage	560/680 V DC
Permissible supply voltage	85 .. 528 V~ (corresponds to 125 .. 740 V DC-bus voltage)
Rated current (rms value)	2 A	4 A	8 A	16 A	32 A
Peak current (crest value)	5.5 A	11 A	22 A	45 A	90 A
for AC servo motors	up to 3 Nm rated torque	up to 7 Nm rated torque	up to 17 Nm rated torque	up to 35 Nm rated torque	up to 85 Nm rated torque
Switching frequency	8 or 16 kHz (to be selected)
Control supply voltage	24 V DC ±20%, 0.5 A			24 V DC ±20%, 1.1 A
Dimensions w×h×d	70 × 275 × 200 mm (size 2)			190 × 275 × 227 mm (size 3)

* BN 6783 (8 A devices) and BN 6787 (32 A devices) servo drives may be operated at a power circuit switching frequency of 8 kHz without restrictions. With 16 kHz, the rated current is reduced to 6 A or 16 A (rms) and the pulse current to 22 A or 45 A (crest value), respectively.

To the overview of all servo drive families.