Specifications

10
MX Protection, Control and Monitoring Features FCD LMENTB2300-01 – 07/08
Accuracy = 99% of full scale value (for Drive Sleeve Turns > 50)•
Non-Linearity = ± 1% of full scale value•
Impedance = 0–600 ohms (4–20 mA signal)•
Minimum external load = 1000 ohms (0–10 VDC signal)•
Analog Torque Transmitter (ATT)
The ATT is internally powered and provides an electrically isolated output signal of 4–20 mA and/
or 0-20 mA, 0-10 VDC, 2-10 VDC, 0-5 VDC, or 1-5 VDC, which is proportional to actuator rated output
torque.
Accuracy = 99% of full scale value•
Non-Linearity = ± 1% of full scale value•
Impedance= 0–600 ohms (4–20 mA signal)•
Minimum external load = 1000 ohms (0–10 VDC signal)•
Two-Speed Timer
A two-speed pulsing timer can be enabled to extend the operating time in the close and/or the open
directions. Pulsing may be applied from 0.5 (if precision is set to xxx.x%) to 99% of full valve travel
or to a small portion. The ON pulsing cycle is configurable from 0.5 to 20 seconds in 0.5 second
increments, and the OFF pulsing cycle is configurable from 1.0 to 200 seconds in 1 second incre-
ments. The two-speed timer is especially effective where concerns of hydraulic shock exist.
Control Station (CSE)
The CSE is a separate control station designed for the operation of inaccessible actuators. It is
available with LEDs, Remote/Local and Open/Close selector switches. The CSE may be powered by
the actuator internal supply, provided wire resistance and other external loads do not limit the available
signal power presented to the MX.
Isolation and Load Break Switches
Isolation and Load Break Switches can be supplied for the incoming three-phase supply to the
actuator. These may be coupled directly to the actuator for weatherproof (WP) applications only or
supplied separately for mounting by user. The enclosure is suitable for weatherproof or temporary
submersion service. An explosion-proof (XP) isolation switch is also available for user mounting. It is
suitable for mounting with all MX actuators. Please contact factory for availability.
Lost Power Buffer – MX Quik
™
After the actuator has been powered by line power for one hour, it can automatically withstand most
power outages while maintaining the correct state of the S or R status contacts, even if the user reposi-
tions the actuator manually with the handwheel. To maximize its self-power time while the line power
is lost, the actuator places itself in its lowest possible power usage mode. The LCD will darken (sleep
mode) until it is needed to be viewed. The LCD can be activated by moving the black knob to OPEN
(YES) or by moving the actuator with the handwheel. After the programmable period of inactivity, the
LCD returns to sleep mode. The use of batteries to perform this function is not required.
Custom Software – Momentary Contact ESD and Partial Stroke ESD
An optional, custom software has been developed which, when combined with the unique safety
features of the MX actuator, permits a unique scope of performance for Partial stroke and Emergency
Shutdown installations.