The 10A8 PWM servo amplifiers are designed to drive brush type DC motors. The 10A8 is fully protected against over-voltage, over-current, over-heating and short-circuits across motor, ground and power leads. This amplifier interfaces with digital controllers or can be used as a stand-alone drive. The 10A8 requires only a single unregulated power supply. A potentiometer is located on the side for loop gain adjustment.

SPECIFICATIONS

Power Specifications

Description Units Value

DC Supply Voltage Range VDC 20 - 80

DC Bus Over Voltage Limit VDC 86

Maximum Peak Output Current1 A 10

Maximum Continuous Output Current A 6

Maximum Power Dissipation at Continuous Current W 24

Minimum Load Inductance (Line-To-Line)2 µH 200

Switching Frequency kHz 33

Control Specifications

Description Units Value

Command Sources - ±10 V Analog

Feedback Supported - Tachometer

Modes of Operation - Current, Tachometer Velocity, Voltage

Motors Supported - Single Phase (Brushed, Voice Coil, Inductive Load)

Hardware Protection - Over Current, Over Temperature, Over Voltage, Short Circuit (Phase-Phase &

Phase-Ground)

Mechanical Specifications

Description Units Value

Agency Approvals - CE Class A (EMC), CE Class A (LVD), cUL, RoHS, UL

Size (H x W x D) mm (in) 50.8 x 101.6 x 15.2 (2 x 4 x 0.6)

Weight g (oz) 145 (5.1)

Heatsink (Base) Temperature Range3 °C (°F) 0 - 65 (32 - 149)

Storage Temperature Range °C (°F) -40 - 85 (-40 - 185)

Form Factor - PCB Mounted

P1 Connector - Two 16-pin, 2.54 mm spaced headers (3 pins removed)

 Notes

1. Maximum duration of peak current is ~2 seconds.

2. Lower inductance is acceptable for bus voltages well below maximum. Use external inductance to meet requirements.

3. Additional cooling and/or heatsink may be required to achieve rated performance.

Analog Servo Drive 10A8

Release Date:

10/2/2009

Revision:

2.00

PIN FUNCTIONS:

P1 - Signal & Power Connector

Pin Name Description / Notes I/O

1 NC Not Connected (Reserved) -

2 SIGNAL GND Signal Ground GND

3 NC Not Connected (Reserved) -

4 +REF IN Positive Reference Input. ±10 V Operating Range, ±15 V Maximum Input. Referenced To

Signal Ground. I

5 -TACH IN Negative Tachometer Input (Maximum ±60 V). Use signal ground for positive input. I

6 +REF IN Positive Reference Input. ±10 V Operating Range, ±15 V Maximum Input. Referenced To

Signal Ground. I

7 +TACH / GND Positive Tachometer Input and Signal Ground GND

8 CURR LIMIT RES Current Monitor and Current Limit Resistor. This signal is proportional to the actual current

output. Scaling is 2 A/V. This pin is also used for current limiting (see P1-9). O

9 CURR LIMIT RES Current Limit Resistor. Used to reduce the factory preset maximum current limit. See

details below. I

10 INT CAP

Current Reference and Integrator Capacitor. Measures the command signal to the internal

current-loop. This pin has a maximum output of ±7.25 V when the drive outputs maximum

peak current. This pin is also used to eliminate velocity/voltage loop integral gain (see P1-

13).

O

11 INV OUT Output of the internal unity-gain inverting amplifier. O

12 INHIBIT IN Apply +3 to +15 V @ 1 mA to inhibit drive. Inhibit turns off all power devices. I

13 INT CAP Integrator Capacitor. Shorting this pin to P1-10 eliminates velocity/voltage loop integral

gain. O

14 INHIBIT Apply +15 V or leave open to enable drive. Pull to ground to inhibit drive. Inhibit turns off all

power devices. I

15 VOLT OUT Output of the internal differential amplifier. This signal is proportional to the output voltage. O

16 INV IN Input of the internal unity-gain inverting amplifier. I

17 GND GND

18 GND GND

19 GND GND

20 GND

Power Ground (Common With Signal Ground)

GND

21 +PWR I

22 +PWR I

23 +PWR

DC Power Input

I

24 -MOT O

25 -MOT O

26 -MOT

Negative Motor Output

O

27 +MOT O

28 +MOT O

29 +MOT

Positive Motor Output

O

Pin Details

CURR LIMIT RES (P1-9)

This pin can be used to reduce the peak and continuous current limits while maintaining their ratio (60%) by connecting an

external current limiting resistor between this pin (P1-9) and P1-8. See table below.

Current Limit Resistor OPEN 20 kΩ 7 kΩ 4 kΩ 1 kΩ 0 kΩ (SHORT)

Peak Current Limit 10 A 8 A 6 A 4 A 2 A 0 A