|
Manufacture |
ABB |
|
Model |
G122-824-002 |
| PN No. |
G122-824-002 |
| Catalog | Spare Parts |
| Description |
PI Servoamplifier |
| Origin | Australia |
| HS CODE |
85371098 |
| Dimension |
10*11*4.5 (CM) |
| Weight | 0.18 kg |
Description:
The G122-824 P-I Servoamplifier is used in closed loop applications where a proportional and/or integral amplifier is needed. Selector switches inside the amplifier enable proportional, integral or both to be selected. Many aspects of the amplifier’s characteristics can be selected with internal switches. This enables one amplifier to be used in many different applications.
The configuration options provided are the result of many years of experience in designing and commissioning closed loop systems.
The Servoamplifier employs analog electronics. It accepts three input signals, two single ended and one differential. These are summed to produce an error signal which is then amplified proportionally and also integrated. The proportional and integral signals are switched together and output as a current or voltage to drive a servovalve.
Front panel trim pots, LED indicators and test points allow fast and easy setup and aid in trouble shooting. The servoamplifier is housed in a compact DIN rail mounting enclosure and requires a +24V supply
Features
- P, I or P&I control
- User friendly front panel with LEDs and test points
- Two single ended inputs, one scalable
- Differential input with zero and gain
- Feedback transducer excitation output
- Optional feedback derivative term
- "In position" output
- Dither
- Enable input
- Compact DIN rail housing
- CE marked
| Item | Key Specification |
|---|---|
| Control Mode | P, I, or P & I (internally selectable) |
| Input Signals | Two single-ended inputs and one differential feedback input |
| Feedback Type | ±10 V or 4–20 mA, switch selectable |
| Output Type | Voltage or current output, selectable |
| Output Range | ±10 V or up to ±50 mA |
| Maximum Output | Up to ±100 mA (combined current selection) |
| Gain Adjustment | Proportional and integral gains independently adjustable |
| Dither Function | Built-in 200 Hz dither, on/off selectable |
| Enable Function | External 24 V enable input |
| Power Supply | 24 V DC (22–28 V operating range) |
| Mounting | DIN rail |
| Operating Temperature | 0 to +40 °C |
| Compliance | CE marked |
Frequently Asked Questions (FAQ)
Q1: What types of input signals does the amplifier accept?
The servo amplifier accepts two single-ended inputs and one differential feedback input. One of the single-ended inputs can be scaled, while the feedback input supports either ±10 V or 4–20 mA signals, selectable via internal switches.
Q2: Can the proportional and integral functions be used independently?
Yes. The amplifier allows proportional-only, integral-only, or combined P & I control. The control mode is selected internally, providing flexibility for different control strategies.
Q3: Is derivative (D) control available?
A derivative (velocity) feedback function can be implemented using a plug-in resistor and fixed capacitor. This option is typically used to improve dynamic response in specific applications.
Q4: What output formats are supported?
The output stage can be configured for either voltage output (±10 V) or current output. Multiple current ranges are available, allowing the amplifier to directly drive a wide range of servo valves.
Q5: How is dither implemented and why is it used?
The amplifier includes an internal fixed-frequency dither oscillator at 200 Hz. Dither can be enabled or disabled via a switch and is used to reduce valve stiction and improve low-speed performance.
Q6: Does the amplifier provide excitation for feedback transducers?
Yes. A regulated +10 V excitation output is provided for feedback transducers, simplifying system wiring and reducing the need for external power sources.
Datasheet Link:
G122-824-002 Moog PI Servoamplifier PDF Datasheet
