Description
MOOG G123-825-001
MOOG G123-825-001 is a compact DIN rail mounting buffer amplifier belonging to the G123 series. It is specially designed to solve signal compatibility issues between PLC/servo amplifiers and MOOG servo/proportional valves. It is mainly used for signal conversion, noise filtering and drive adaptation. It supports non-modification upgrade from traditional Mechanical Feedback (MFB) valves to modern Electrical Feedback (EFB) valves, and is widely applied in industrial servo control, test equipment and system upgrade scenarios.
1. Basic Information & Functions
Part Number: G123-825-001Product Type: Buffer Amplifier (Servo Signal Conversion Module)Brand: MOOG
Core Positioning:As a signal interface unit, it builds a communication bridge between standard controllers (PLC / servo amplifier) and MOOG servo/proportional valves, solves voltage and current signal mismatch problems, and provides signal filtering and driving capability to meet the demands of high-precision industrial control and system upgrading.
Core Functions
- Multi-signal Compatibility & Conversion: Supports three types of input: ±10V, 4-20mA, 0-±100mA (MFB). It can output ±10V, 4-20mA, 0-±5 to ±100mA (switch-selectable superposition) signals, compatible with the full range of MOOG servo valves.
- Active Filtering & Noise Reduction: Built-in single-pole active filter with selectable cutoff frequencies of 7/16/34/72/723Hz, which effectively filters industrial electromagnetic noise and improves signal stability.
- MFB to EFB Upgrade: No need to replace the servo amplifier; it directly converts traditional Mechanical Feedback (MFB) valve signals into signals compatible with modern Electrical Feedback (EFB) valves, reducing upgrade costs.
- Status Indication & Commissioning: Equipped with Vv/Iv LED indicators and front test points to display real-time input/output status, facilitating on-site commissioning and troubleshooting.
- Overload Protection: Built-in overcurrent and short-circuit protection prevents module or rear-end servo valve damage caused by output overload, improving overall system reliability.
2. Technical Specifications
| Parameter Item | Specification Details |
|---|---|
| Part Number | G123-825-001 |
| Manufacturer | MOOG |
| Supply Voltage | 24VDC (Compatible with 22-28VDC) |
| Quiescent Current | 65mA (No load output) |
| Operating Current | 170mA (100mA output) |
| Input Signal | Voltage: 0-±10V (100kΩ impedance); Current: 4-20mA (50Ω impedance), 0-±100mA (MFB) |
| Output Signal | Voltage: 0-±10V (Min. load 1kΩ); Current: 4-20mA (Max. load 500Ω), 0-±5/10/20/30/50mA (superimposable, max ±100mA) |
| Filter | Single-pole active, cutoff frequency 7/16/34/72/723Hz (switch selectable) |
| Operating Temperature | 0°C ~ 40°C |
| Protection Class | IP20 |
| Mounting Type | DIN Rail Mounting |
| Dimensions (W × D × H) | 22.5mm×114mm×99mm |
| Weight | Approx. 0.25kg |
3. Hardware Design & Structural Details
PCB & Material: Adopts industrial flame-retardant PCB board with engineering plastic housing. It is sturdy and durable, featuring vibration resistance and anti-electromagnetic interference performance, suitable for long-term operation in industrial sites.
Structural Layout
- Input Area: Left-side terminal blocks for ±10V, 4-20mA and MFB signal input with clear marking for easy wiring.
- Filter & Conversion Area: Integrates filter circuits, signal conversion chips and protection circuits to realize signal processing and overload protection.
- Output Area: Right-side terminal blocks output voltage/current signals adapted to servo valves; reserved test points facilitate on-site inspection.
- Status Indication Area: Panel LED indicators display power, input and output status to intuitively reflect operating conditions.
Anti-interference Design: Adopts EMI filtering, signal isolation and optimized grounding design to effectively suppress industrial electromagnetic interference and ensure accurate and stable signal transmission.
4. Working Principle & Signal Flow
- Signal Access: ±10V/4-20mA signals from PLC or servo amplifier, or current signals from traditional MFB servo valves, are connected to the module via input terminals.
- Filtering Processing: The input signal passes through a single-pole active filter to eliminate high-frequency noise. The cutoff frequency is selected via panel switches to adapt to different on-site interference environments.
- Signal Conversion: The filtered signal is converted by internal circuits into voltage/current signals suitable for servo valves, supporting MFB to EFB signal format conversion.
- Drive Output: The converted signal drives MOOG servo/proportional valves through output terminals to realize precise position, speed or force control.
- Status Monitoring & Protection: The module monitors input and output status in real time, with LED alarms for abnormalities. Overcurrent/short-circuit conditions trigger protection to cut off output and protect the module and downstream equipment.
5. Features & Advantages
- Strong Signal Compatibility: Covers standard industrial voltage/current signals and fits the full range of MOOG servo valves, solving signal mismatch problems between old and new systems.
- Convenient System Upgrade: Supports MFB to EFB valve upgrade without modifying the original servo amplifier, greatly reducing upgrade costs and downtime.
- High Precision & Stability: Active filtering effectively reduces noise with high signal conversion accuracy, ensuring servo system control precision and dynamic response.
- Compact & User-friendly: DIN rail mounting, compact size, simple wiring and clear LED indication enable rapid deployment and commissioning without professional skills.
- Industrial Reliability: Wide voltage supply, overload protection and anti-interference design adapt to industrial environments of 0°C~40°C, ensuring stable long-term operation.
6. Application Scenarios
- Industrial Automation: Servo valve control for CNC machine tools, robots and packaging machinery to achieve high-precision motion control.
- Test Equipment: Material testing machines, vibration test benches and hydraulic test systems, driving MOOG servo valves for closed-loop force and displacement control.
- System Renovation: Replace MFB servo valves with EFB valves on legacy equipment without changing controllers or servo amplifiers, lowering renovation costs.
- Aerospace & Military Industry: Ground simulation of flight control systems, engine testing and ship steering gear control, meeting high-precision and high-reliability control requirements.
- New Energy & Metallurgy: Wind turbine pitch control systems, rolling mill thickness/vibration control, driving servo valves for precise hydraulic control.
