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Advanced motion controls 120a10b nh
1. 120A10 Series
SERIES 120A10 SERVO AMPLIFIERS
MODEL: 120A10
ELECTROMATE
Toll Free Phone (877) SERVO98
Toll Free Fax (877) SERV099
www.electromate.com
sales@electromate.com
FEATURES:
· Surface-mount technology
Small size, low cost, ease of use
· Optical isolation, see block diagram
· DIP switch selectable modes:
current, voltage, velocity,
IR compensation, analog position loop
· Four quadrant regenerative operation
· Agency Approvals Pending
BLOCK DIAGRAM:
Sold & Serviced By:
2. Sold & Serviced By:
ELECTROMATE
Toll Free Phone (877) SERVO98
Toll Free Fax (877) SERV099
120A10 Series
www.electromate.com
sales@electromate.com
DESCRIPTION: The 120A Series PWM servo amplifiers are designed to drive brush type DC motors at a high
switching frequency. Single red/green LED indicates operating status. All models are fully protected against over-voltage,
A-30
under-voltage, over-current, over-heating and short-circuits across motor, ground and power leads. All
models interface with digital controllers or can be used as a stand-alone drive. They require only a single
unregulated DC power supply. Loop gain, current limit, input gain and offset can be adjusted using 14-turn
potentiometers. The offset adjusting potentiometer can also be used as an on-board input signal for testing
purposes when SW10 (DIP switch) is ON.
SPECIFICATIONS:
MODEL
POWER STAGE SPECIFICATIONS 120A10*
DC SUPPLY VOLTAGE 30 - 80 V
PEAK CURRENT (2 sec. max., internally limited) ± 120 A
MAXIMUM CONTINUOUS CURRENT (internally limited) ± 60 A
MINIMUM LOAD INDUCTANCE** 300 μH
SWITCHING FREQUENCY 15 kHz ± 15%
HEATSINK (BASE) TEMPERATURE RANGE -25o to +65o C; disables if >65o C
POWER DISSIPATION AT CONTINUOUS CURRENT 300 W
OVER-VOLTAGE SHUT-DOWN (self-reset) 90 V
BANDWIDTH (load dependent) 2.5 kHz
MECHANICAL SPECIFICATIONS
POWER CONNECTOR Screw Terminals
SIGNAL CONNECTOR 16 pin Molex connector
SIZE 10 x 5.12 x 2.63 inches
254 x 130.2 x 66.7 mm
WEIGHT 3.60 lbs.
1.63 Kg.
*This model is available in a 24 V version. The part number is 120A10-24. Operating voltage is 20-40 VDC.
** Low inductance motors ("pancake" and "basket-wound") require external inductors.
3. 120A10 Series
A-31
PIN FUNCTIONS:
CONNECTOR PIN NAME DESCRIPTION / NOTES I/O
1 +10 V OUT O
2 SIGNAL GND SGN
D
3 -10 V OUT
Provides regulated voltages of ±10 V @ 3 mA for
customer use. Short circuit protected. P1-2 is the
signal ground.
O
4 +REF IN
5 -REF IN
Command signal. Differential analog input, maximum
±15 V, 40K input resistance. I
6 -TACH IN
7 +TACH (SGND)
Maximum ±60 VDC, 60K input resistance I
8
CURRENT
MONITOR OUT
This signal is proportional to the actual current in the
motor leads. Scaling is 1 V = 18 A when SW5 = ON
(full current) and 1 V = 9 A when SW5 = OFF.
O
9 CURRENT
REFERENCE OUT
Command signal to the internal current-loop. The
maximum peak current rating of the amplifier equals
7.25 V at this pin. See current limit adjustment
information below.
O
10 CONTINUOUS
CURRENT LIMIT
Can be used to reduce the factory-preset maximum
continuous current limit. See current limit
adjustment information below.
I
11 INHIBIT
Inhibit. TTL, turns off all four power devices of the "H"
bridge drive when pulled to ground. Will cause high
FAULT and red LED. For inverted inhibit inputs; see
section "G".
I
12 +INHIBIT
Inhibits the motor for "+" direction only. This function can
be useful to remove power to the motor using a "limit
switch". Will not cause high FAULT or red LED.
I
13 -INHIBIT
Inhibits the motor for "-" direction only. This function can
be useful to remove power to the motor using a "limit
switch". Will not cause high FAULT or red LED.
I
14 FAULT OUT
(red LED)
TTL compatible output. It becomes high during
output short-circuit, over-voltage, under voltage,
over-heating, inhibit, and during "power-on reset". A
red LED also indicates a fault condition.
O
15 NC No connection.
P1
16 NC No connection.
CONNECTOR PIN NAME DESCRIPTION / NOTES I/O
1 -MOTOR Motor minus connection. O
2 +MOTOR Motor plus connection. O
3 POWER
GROUND Power Ground. PGN
D
4 POWER
GROUND Power Ground. PGN
D
P2
5 HIGH VOLTAGE DC voltage input. I
Sold & Serviced By:
ELECTROMATE
Toll Free Phone (877) SERVO98
Toll Free Fax (877) SERV099
www.electromate.com
sales@electromate.com
4. Sold & Serviced By:
120A10 Series
SWITCH FUNCTIONS:
A-32
SETTING
SWITCH FUNCTION DESCRIPTION
ON OFF
1 Internal voltage feedback On Off
2 Internal current feedback for IR compensation On Off
3 Current loop gain Decrease Increase
4 Inhibit Select P1-11, 12, 13 : inhibit P1-11, 12, 13 : enable
5
Current scaling.
When OFF reduces both peak and continuous
current limit by 50% (see section "G").
Full-current Half-current
6
Can be used to reduce factory-preset
maximum continuous current limit (see section
"G").
Cont./Peak
Ratio 25%
Cont./Peak
Ratio 50%
7 It is recommended to leave SW7 in the OFF
position.
Shorts out the current
loop integrator
capacitor
Current loop integrator
operating
8
This capacitor normally ensures "error-free"
operation by reducing the error-signal (output
of summing amplifier) to zero.
Velocity / voltage loop
integrator disabled
Velocity / voltage loop
integrator enabled
9
Increases the value of the integrator capacitor.
It is recommended to leave SW9 in the OFF
position for most applications.
Increase Decrease
10
Offset / test. Sensitivity of the "offset" pot.
Used as an on-board reference signal in test
mode.
Test Offset
POTENTIOMETER FUNCTIONS:
POTENTIOMETER DESCRIPTION TURNING CW
Pot 1 Loop gain adjustment in voltage & velocity modes. Increases loop gain
Pot 2
Current limit. It adjusts both continuous and peak current limit
while maintaining their ratio (50%). Increases current limit
Pot 3
Reference gain. It adjusts the ratio between reference signal
and output variable (voltage, current, or velocity).
Increases reference
input gain
Pot 4
Offset / test. Used to adjust any imbalance in the input signal
or in the amplifier. When SW10 (DIP switch) is ON, the
sensitivity of this pot is greatly increased thus it can be used
as an on-board signal source for testing purposes. See section
“G”.
N/A
ELECTROMATE
Toll Free Phone (877) SERVO98
Toll Free Fax (877) SERV099
www.electromate.com
sales@electromate.com
5. 120A10 Series
A-33
ELECTROMATE
Toll Free Phone (877) SERVO98
Toll Free Fax (877) SERV099
www.electromate.com
sales@electromate.com
TEST POINTS FOR POTENTIOMETERS: See section “G”.
SET-UP: See section “G” for engineering and installation notes.
OPERATING MODE SELECTION:
These modes can be selected by the DIP switches according to the chart in the functional block diagram:
· Current Mode
· Voltage Mode
· IR Compensation Mode
· Tachometer Mode
See section "G" for more information.
APPLICATION NOTE:
See section “G” for more information on analog position loop mode.
CURRENT LIMIT ADJUSTMENTS:
These amplifiers feature separate peak and continuous current limit adjustments.
The current limit adjusting Pot 2 adjusts both peak and continuous current limit at the same time. It has 12 active
turns plus 1 inactive turn at each end and is approximately linear. Thus, to adjust the current limit, turn the
potentiometer counter-clockwise to zero, then turn clockwise to the appropriate value. If the desired limit is, for
example, 60 amperes, and the servo amplifier’s peak current is 120 amperes, turn the potentiometer 7 turns
clockwise from zero.
Pin P1-9 is the input to the internal current amplifier stage. Since the output current is proportional to P1-9, the
adjusted current limit can easily be observed at this pin. Note that a command signal must be applied to the
reference inputs to obtain a reading on P1-9. The maximum peak current value equals 7.25 V at this pin. If SW5 =
ON, peak rated amplifier current = 7.25 V. If SW5 = OFF, 1/2 peak rated amplifier current = 7.25 V. Example:
using the 120A10 with SW5 = ON, 120A = 7.25 V and with SW5 = OFF, 60A = 7.25 V.
The actual current can be monitored at pin P1-8.
The continuous current limit can be reduced without affecting the peak current limit by connecting an external
current limiting resistor between P1-10 and P1-2. See table below.
CURRENT LIMITING RESISTOR 40K 20K 3K 1K 0K
CONTINUOUS CURRENT LIMIT 90% 80% 50% 30% 10%
SW6 (DIP switch) will reduce the continuous current limit to 50% of the maximum value, when switched ON. SW5
(DIP switch) will reduce the current feedback (monitor) scaling by 50%, thereby reducing both the peak and the
continuous current limit by 50%, when switched OFF.
TYPICAL SYSTEM WIRING: See section "G".
ORDERING INFORMATION:
Model: 120A10X
X indicates the current revision letter.
MOUNTING DIMENSIONS: See page F-12
Sold & Serviced By: