Closed-loop control
Designed for closed-loop applications. The amplifier compares command to feedback and drives the servo valve coil at the right current to close the loop.
NC Servo Technology - Westland, Michigan
734-326-6666
Made by NC Servo Technology Since 1975
NCSA-110-300 General-Purpose Servo Amplifier
The NCSA-110-300 is NC Servo's own general-purpose servo amplifier card. Adjustable output current up to 250ma, voltage or 4-20ma I/O on both command and feedback, a built-in 500 Hz dither oscillator, and a regulated +/-15V supply for feedback sensors at the terminal strip. Designed to drop into closed-loop applications where the servo valve needs current-output drive, including many valves we already service from Moog, Parker, Bosch Rexroth, Vickers, and others.
Up to 250ma output
0-100ma standard, up to 250ma with a documented component change.
Voltage or 4-20ma I/O
Plus or minus 10V signals or 4-20ma current loops, on both command and feedback.
One-year warranty
Standard on all new NCSA-110-300 cards from NC Servo Technology.
At a Glance
Key specifications
The four specs below are the ones customers ask about first. Full electrical and mechanical details are in the documentation that ships with each unit.
Output current
0 to 100ma (250ma w/ change)
Command / feedback
+/-10V or 4-20ma
Dither oscillator
500 Hz built-in
Sensor supply
+/-15V regulated, 200ma
What It Is
A general-purpose closed-loop servo amplifier
The NCSA-110-300 is built for closed-loop hydraulic servo valve control where the valve needs current-output drive and a closed feedback loop. It accepts the most common command and feedback signal types and lets the integrator dial in the loop on three independent gain adjustments.
Integrator-friendly
Clearly labeled test points and components throughout the board layout. Standard test equipment connects directly at the terminal strip.
Made in-house
NC Servo Technology has built and supported the NCSA-110-300 line since 1975. We make it, we stock it, and we know how to integrate it.
Servo Valve Compatibility
Pairs with current-output servo valves
The NCSA-110-300 is designed to drive servo valves that take a current-output command, up to 250ma. The brands below are the ones the shop services regularly, and the NCSA fits closed-loop applications across all of them. Application fit depends on the specific valve, feedback type, and integration details.
Moog
Servo valves with current-output requirements up to 250ma.
Parker
Parker BD and similar current-output servo valves.
Bosch Rexroth
Current-output Rexroth servo bodies in closed-loop applications.
Vickers, others
Vickers SM4 servo valves and other current-output bodies. Confirm fit case by case.
Up Close
NCSA-110-300 board views
The NCSA-110-300 is a single-board servo amplifier with the transformer, capacitors, terminal block, and trim potentiometers all visible from the top. The views below show the layout and give you a sense of the test points and adjustment access.
Tunable Loop
Three independent gain adjustments
The NCSA-110-300 gives the integrator three trim points to dial in the closed loop. The adjustment ranges are wide enough to handle most current-output servo valve applications without needing custom rework.
Feedback gain
Adjustable from 2:1. Sets how strongly the feedback signal counters the command. Use to tune the loop response to the specific feedback sensor.
Reference span
Adjustable from 200:1. Scales the command reference signal to match the servo valve's drive range. Use to fit a specific valve into a given command range.
Proportional error gain
Adjustable from 200:1. Sets the loop's response to the error signal. Use to tune the closed-loop dynamics for the application.
Full Spec Sheet
NCSA-110-300 detailed specifications
Reference values for sizing and integration. Full documentation including terminal diagrams and adjustment procedures ships with each unit.
| Output current | 0 to 100ma adjustable as shipped. Up to 250ma maximum with documented component change. |
|---|---|
| Command reference input | Plus or minus 10V voltage signal or 4 to 20ma current signal. |
| Feedback input | Plus or minus 10V voltage signal or 4 to 20ma current signal. |
| Dither oscillator | 500 Hz built-in. Reduces servo valve static friction and improves response to small command signals. |
| Sensor power supply | Regulated plus or minus 15V at 200ma capacity, available at the terminal strip. |
| Feedback gain adjustment | Adjustable from 2:1. |
| Reference span adjustment | Adjustable from 200:1. |
| Proportional error gain | Adjustable from 200:1. |
| Input voltage | 115V or 230V, 50 or 60 Hz. |
More on the NCSA-110-300
Related pages and brands
The NCSA-110-300 is built to drive servo valves we already service every day. The pages below cover the brands and the broader drive hub.
Servo drive repair hub
The full range of servo drive and amplifier work NC Servo handles, including the NCSA-110-300 and other brands.
Moog servo valves
Moog current-output servo valves the NCSA-110-300 can drive in closed-loop applications.
Parker servo valves
Parker servo valves with current-output drive that pair with the NCSA-110-300.
Vickers servo valves
Vickers SM4 and other current-output servo valves the NCSA-110-300 can drive.
Need an NCSA-110-300?
Give us a call with the servo valve you are looking to drive (brand and part number), the command and feedback signals you have available, and the maximum coil current the valve needs. We will confirm fit and quote the unit.
FAQ
Common questions about the NCSA-110-300
A few things integrators ask before ordering. Anything not covered, give us a call at 734-326-6666.
What servo valves is the NCSA-110-300 compatible with?
The NCSA-110-300 is a general-purpose amplifier compatible with many current-output servo valve applications requiring closed loop control. It works with many servo valves from Moog, Parker, Bosch Rexroth, Vickers, and other manufacturers that require current output drive (up to 250ma). Application fit depends on electrical requirements, feedback type, and integration details. Give us a call to confirm compatibility before installation.
Can I adjust the output current range?
Yes. As shipped, the NCSA-110-300 has adjustable output current from 0ma to 100ma. With a simple component change documented in the manual, you can increase the maximum output to 250ma.
What input signal types does the NCSA-110-300 accept?
The NCSA-110-300 accepts both voltage and current signals for command and feedback inputs. Specifically, it supports plus or minus 10V voltage signals or 4-20ma current signals for both the command reference input and feedback input.
What is the purpose of the 500 Hz dither oscillator?
The built-in 500 Hz dither oscillator improves servo valve performance by reducing static friction and improving response to small command signals.
Can I use the NCSA-110-300 to power my feedback sensor?
Yes. The NCSA-110-300 includes a regulated plus or minus 15V power supply output at 200ma capacity, available directly at the terminal strip.
What are the adjustment ranges for gain settings?
The NCSA-110-300 offers three adjustable parameters: feedback gain adjustable from 2:1, reference span adjustable from 200:1, and proportional error gain adjustable from 200:1.
Can the NCSA-110-300 replace obsolete amplifiers?
In many cases yes, depending on application requirements. The flexible input options, adjustable output current, and wide gain adjustment ranges let it substitute for legacy amplifiers in many current-output servo valve applications. Give us a call with the unit you are looking to replace and we can confirm fit.
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