Specifications

MODELS 7225AC, 7425AC
LINE-POWERED AC BRUSHLESS SERVO AMPLIFIERS
WITH +/-10V ANALOG U-V INPUTS
Copley Controls Corp, 20 Dan Road, Canton, MA 02021, USA Tel: [phone] Fax: [phone]
E-mail: [e-mail], on the Internet at http://www.copleycontrols.com Page 2 of 12
TECHNICAL SPECIFICATIONS
MODEL 7225AC 7425AC
OUTPUT POWER
Peak power 20 A @ 110V 20 A @ 205V
Peak time 2 sec at peak power independent of polarity reversal
Continuous power 10 A @ 130V 10 A @ 250V
OUTPUT VOLTAGE
On-resistance (Ro, ohms) 0.2 0.15
Max PWM Peak Output Voltage
Vout = (VAC X 1.41 -2) (0.97) - (Ro) (Io)
INPUT POWER
Mains voltage 32~132VAC, 47~63Hz 32~264VAC, 47~63Hz
Mains current @ continuous output rating 16 A 16 A
Inrush current on startup 19 A. 37 A.
External mains fuse rating 20 A/125V 20 A/250V
LOAD INDUCTANCE
Minimum inductance 400 µH. 400 µH.
Maximum inductance No maximum. See chart of load inductance values. Bandwidth varies with inductance and header parts.
BANDWIDTH Small signal -3dB @ 3kHz with minimum load at nominal supply voltage. Varies with load inductance and header values
PWM OUTPUTS
PWM frequency 25kHz
Modulation Carrier-cancellation, 50% duty cycle at 0V output
REFERENCE INPUT Differential, 94k
max. to 47k min. between inputs, 20V maximum
POTENTIOMETERS U Ref Fine Gain (R1) Default = Center CCW attenuates U Reference.
V Ref Fine Gain (R2) Default = Center CCW attenuates V Reference.
(Internal)
U phase current Zero (R7) Adjusts U output current to zero with U and V inputs = 0V.
V phase current Zero (R6) Adjusts V output current to zero with U and V inputs = 0V.
DIPSWITCH
S1 /Enable input active polarity. OFF (default): Gnd enables amplifier, open or +5V inhibits. ON: Gnd inhibits, open enables
UV PHASE SELECTION Internal jumper JP1-A selects UV phase of 120 or 90 (Default = 120 )
LOGIC INPUTS
/Enable Default = GND GND enables amplifier, open or >2.5V inhibits with S1 OFF. If S1 ON then GND inhibits
See following section on fail-safe operation for JP1-B settings.
Response time is 1 ms from enable active to amplifier output ON.
/Reset Default = Open GND resets latching fault condition, ground for self-reset every 50 ms.
/Motemp Default = GND Motor temperature sensor. Typically normally closed bimetal sensor. Open = overtemp
Input resistance 10k
to +5V, R-C filters on inputs
Logic threshold voltage 2.5V (Schmitt trigger inputs with hysteresis, 74HC14)
Input voltage range 0V to +32VDC
FAIL-SAFE ENABLE INPUT
Internal jumper JP1-B selects +5V or GND connection for input pull-up resistors to /Enable input only so that amplifier will default to
disabled condition if inputs are open-circuit, or wires are broken. (See Applications section for details)
LOGIC OUTPUTS
/Normal LO (current sinking) when status LED is green; HI when LED is red or blinking red / green.
HI output voltage +5V (no load). Output is N-channel MOSFET drain terminal with10k
pull-up resistor to +5V
LO output voltage On resistance Ro = 5
. Max sink current of 250 mA. max off-voltage = 50VDC
Amp OK Buss volts OK AND NOT (output short OR overtemp)
N-channel opto-isolator is ON when amp is OK. ON current 4 mA min. Max voltage 32 VDC
/CLIMIT HI when amplifier is not current limiting; LO when current is limit is reached.
HI output voltage +5V (No load). Output is LM339 open collector with 10k
pull-up resistor to +5V
LO output voltage Max sink current of 15 mA, max off voltage = 36VDC
STATUS LED
Bicolor LED changes color and flashes to indicate amplifier operating status
Green = Normal Amplifier enabled AND Amp OK (see above)
Blinking green = Ready Amplifier OK, will run when enabled
Red = Fault, non-latching Over or under-voltage condition or motor overtemp; Amplifier recovers when voltage or temp. is in normal range.
Blinking red = Latching Fault Output overcurrent (short circuit) or amp. overtemp condition. Ground /Reset or power amp. off/on to clear condition
CURRENT LIMIT INPUT
Current limit 0-5V controls current limiting (See application section for details)
MONITOR OUTPUTS
Current Monitor U Motor winding current in U phase: 10V @ 20 A or 2 A/V (1k , 33nF R-C filter)
Current Monitor V Motor winding current in V phase:
10V @ 20 A or 2 A/V (1k , 33nF R-C filter)
DC POWER OUTPUTS
+5V @ 200 mA max (J3-23)
+10VDC @ 5 mA (J3-24)
-10VDC @ 5 mA (J3-25)
Note: maximum power from all DC outputs not to exceed 1.4W
Phone: [phone]
Phone: 877-IP-Tech1
Fax: 877-IP-Tech2
www.iptech1.com
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