Flowserve MX Electronic Actuator - Manual (Page 23)

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Limitorque MX Electronic Actuator FCD LMENIM2306-06 – 10/13
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3.3 Electrical Connections
Verify that the supply voltage details on the nameplate are correct for this installation. Setup is non-intrusive; therefore,
remove only the terminal cover to make electrical connections and to commission the actuator.
c WARNING: The removal of any other covers without Limitorque’s approval will void the warranty. Limitorque
will not accept responsibility for any damage or deterioration that may occur as a result of cover removal.
3.3.1 Removing Terminal Cover
Remove the terminal cover as follows:
1. Remove the four cover screws using a 6 mm hexagonal wrench.
2. Remove the cover. XP units have long-spigoted covers and two tapped holes 180° apart. If the XP cover is difficult
to remove, fit two of the cover screws into the tapped holes in the cover flange and jack out the cover. Take care to
turn the screws by equal increments. Do not lever the cover off with a screwdriver, or similar object, since this may
damage the flamepath on an explosionproof unit or the O-ring seal and seating face.
3.3.2 Terminal Compartment Documents
The OEM and user installation kits, wiring diagram, and test report are contained in the terminal compartment or with
the actuator. Do not place them in the terminal compartment when the electrical connections have been completed.
NOTE: This instruction does not apply to valve manufacturers or similar installers of the actuator onto a valve prior to
shipping to site. It is important that these items are available at the final destination site.
3.3.3 Sealing Cable/Conduit Entries
The sealing of cables and conduit entries should be done in accordance with National Standards or the Regulatory
Authorities that have certified the actuators. This is particularly true for units that are certified for use in hazardous areas
where the method of sealing must be to an approved standard and cable glands, reducers, plugs, and adapters must be
approved and separately certified. All conduit entries should be sealed against the climatic conditions prevailing on-site,
especially if temporary submersion is possible. All unused conduit entries should be sealed with threaded metal plugs.
Plastic plugs are installed by Limitorque for shipping only and must not be used as permanent seals.
3.3.4 Recommended Terminal Connections
Power Terminals
Ring tongue connectors used on the power terminals should comply with the dimensions shown in Figure 3.10. For
Additional information, consult terminal manufacturer.
Figure 3.11 details the allowable voltage and current parameters for the terminal block power terminals. Preload the M5
screws to 1.6-3.2 N m (1.2-2.33 ft-lb).
Control Terminals
Ring tongue connectors used on the control terminals should comply with the dimensions shown in Figure 3.12. For
additional information, consult terminal manufacturer. Preload the M3 screws to 0.33-0.66 N m (0.25-0.50 ft-lb).
NOTE: Alternative manufacturers may be substituted only if dimensions are in accordance with Figure 3.12.
NOTE: The use of spade terminals is not recommended for secure electrical connections.