Embiggened Performance

A Digital Servo Controller that’s only big where it counts – performance.

The Big Easy

The DSC100 is a small, fully functioned digital servo controller that’s easy to configure, easy to calibrate, easy to operate, easy to install and, in the unlikely event it needs maintenance, easy to replace on-line. And, while your rotating equipment engineers and technicians will appreciate the ease of use, you’ll appreciate that it’s easy on your project budget.

Typical Configuration

The DSC100 is a compact digital servo controller that’s used to position proportional or integrating hydraulic or pneumatic actuators based on the demand signal from the turbine controller. The DSC100 positions the actuator using single or dual position feedback devices (LVDTs, RVDTs or DC current). The position demand signal can be sent to the DSC100 via Network, Serial or 0-25mA connections.


  • Compact Size
  • Intuitive Configuration and Calibration
  • Modbus TCP Communications and Configuration Interface
  • Serial Modbus (485) Communications and Configuration Interface
  • Redundant 3,4,5,& 6 wire LVDT / RVDT Position Feedback inputs
  • Redundant configurable (+/-250mA, +/-100mA, +/-50mA, +/-10mA)
    Actuator Outputs
  • DIN rail mounted
  • Redundant 24vdc Powered


  • (2) Redundant 3, 4, 5, and 6 wire LVDT / RVDT Position Feedback inputs
  • (2) Redundant DC Current / Voltage Position Feedback inputs
  • (1) “Hard-wired” position demand input (0-25mA)
  • (1) Configurable current Actuator Outputs
  • (1) Digital Reset Command input
  • (1) Digital External Shutdown Input
  • (1) Alarm Output
  • (1) Shutdown Output
  • (1) Modbus RS-485 Connection
  • (1) Modbus TCP Connection


Calibration, Configuration and Monitoring

The DSC100 comes with an easy-to-use Windows-based software application that allows you to configure the DSC100 from a PC.

Calibrating and configuring the DSC100 is fast and easy. In addition to the autocalibrate, tuning, manual valve stroking and on-line adjustment functionality, the DSC100 configuration tool also includes a “built-in” trending tool to help validate tuning and graphically demonstrate valve response.

The DSC100 also records historical information in a .CSV file that can be easily imported into a data management tool like Excel for review.


Power Supply

Feature Description
Inputs (2) Redundant Inputs
Input Voltage 18-32VDC,1A

Valve Position Input

Feature Description
Inputs (2)
LVDT – Exciter output
  • Voltage Range: 5 Vrms
  • Frequency Range: 1.7 kHz
  • Maximum Load: 120 mA
  • Accuracy: 0.2% of full scale @ 25 °C
  • Temperature Sensitivity : 150 ppm/°C
LVDT (AC Input)
  • 3-wire,4-wire,6-wire
  • Common mode rejection: –60 dB @ 60 Hz
  • Input Filter : 10 ms lag
  • Resolution :14 bits
  • Linearity: 0.1% of full scale
  • Temperature sensitivity: 150 ppm/°C
DC Input
  • Current Range: ±40 mA
  • Maximum Input Voltage : ±10 Vdc
  • Common Mode Rejection :–60 dB @ 60 Hz
  • Input Impedance : 250 Ω
  • Input Filter: 5 ms lag
  • Resolution :14 bits
  • Linearity : 0.1% of full scale
  • Temperature sensitivity : 150 ppm/°C

Actuator Driver Output

Feature Description
Output Channel (2) Channels – Current
Output Range
  • ±10 mA
  • ±25 mA
  • ±50 mA
  • ±100 mA
  • ±250 mA
Resolution 14 bits
Accuracy 1%
Linearity 0.2% of full scale
Dither 0–10%, 25% duty cycle @ 25 Hz
Output Filter Filter 6 ms lag

DO Output

Feature Description
Output Channel (2) Channels (Alarm/Shutdown)
Output Type Relay Output
Maximum Current 500 mA
Isolation Voltage 500 Vrms

DI Input

Feature Description
Input Channel (6) channels (Reset,Shutdown, 4 Reserved)
Input Type “Dry-contact” Input
Isolation Voltage 500Vrms
Operation Current 10 mA

RS485 Communication

Feature Description
Hardware Interface RS485
Isolation Voltage 500Vrms
Station Address Set By 8-bit coding switch
Communication Protocol MODBUS
Baud Rate Coding switch selection:4.8Mbps, 9.6Mbps, 38.4Mbps, 115.2Mbps,

Ethernet Communication

Feature Description
Hardware Interface RJ45
Communication protocol Modbus TCP
Rate 100M

Performance Specifications

Feature Description
PID Algorithm Control Cycle 10ms

Environmental Specifications

Feature Description
Temperature of Operation Environment -15°C – 60°C
Relative Humidity of Operation Environment 5%-95%,Non-condensing
Temperature of Storage Environment -25ºC – 75°C
Relative Humidity of Storage Environment 5% – 95%,Non-condensing


4.09″W x 6.93″H x 5.81″D