90 to 140 vdc, metering valve position control
Meggitt’s 90 to 140 VDC motor controller is in use on a variety of industrial
gas turbine engines. With millions of field operating hours, this design
continues to prove the high reliability of Meggitt EMA technology.

Specifications
Function:Positioning controller for precision gas fuel metering valves used on
aero-derivative and frame turbine engines.
Type: Digital pulse-width modulated servo-amplifier
Physical size: 9.625” wide, 8.5” high, 13.55 deep
Weight: 25 pounds
Input voltage: 90 to 140 VDC
Input current: 7.5 amperes maximum
Output current: 0.3 ampere (continuous), 7.0 amperes (peak)
Digital input/output: 0 to 5 VDC
Electrical connections: Terminal strip, AWG 14 to 22
Communications:
C173455 – serial port interface RS-485; C173455-2 – analog
interface 4-20 ma
Ambient temperature: 0 to 70ºC (32 to 158ºF)
Remote installation:
Up to 60 meters (200 feet) wire run length from the fuel metering valve.
The controller consists of a servo amplifier, an I/O signal noise filter, and
a capacitor, which are packaged in a compact three level unit with readily
accessible interface terminations on its top plate. The servo amplifier is
mounted on a cold plate on the lower level, and the resistor/capacitor
network, inlet EMI noise filter and outlet common mode choke filter are
on the middle level.
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