Flowserve UEX Limitorque - Manual (Page 24)

Limitorque UEX FCD LMENIM1205-03-AQ – 05/15
24
Remote Control Type
The actuator may be placed in digital only, modulation only, network only, or multi-command types.
• Digital (Discrete) Only Control Type – Only digital input commands are recognized and acted upon.
All other types of remote control commands are ignored.
• Analog (Modutronic) Only Control Type – Only Modutronic 4-20 mA commands are recognized and
acted upon. All other types of remote control commands are ignored.
• Network Only Control Type – Only network (DDC, Fieldbus, Profibus, Device Net) commands are
recognized and acted upon. All other types of remote control commands are ignored.
• Multi-control Mode Operation - there are three modes of remote control when remote mode is
configured for multi control: digital control, analog control, and network control. Digital and network
control operation is based on the last command received. Analog operation is initiated by either
toggling user input 2 (configure for CSE input) or breaking and reapplying the analog control.
Remote Control Signal Power
Power for remote control signals may be derived internally from the actuator or provided externally by
the user. Signals can range from 24 to 125 VAC or VDC.
External Power Supply
An external power supply in the range of 12 to 24 VDC may be provided by the user with the optional
UPS board.
Standard Internal Power Supply
The standard internal signal supply is 24 VDC. The 24 VDC supply offers a maximum loading of 5 W.
The 24 VDC supply, in conjunction with the opto-isolated digital inputs, allows control from remote volt-
free contacts over long distances and simplifies the user’s control scheme. Standard control employs a
negative earth. Positive earth (negative switching) is available by wiring to the (+) positive common as
shown on the wiring diagrams.
6.4 Emergency Shutdown (ESD)
Up to three independent ESD signals may be applied, prioritized and configured for different actions
for the ESD event associated with each. Either of these ESD signals may be applied to the actuator
to override any existing command signal and send the valve to its preselected shutdown position,
providing the actuator is in Remote mode (default configuration for ESD is “Ignore, take no action”).
Any new command signal will be ignored until the ESD signal is removed. During setup, the actuator
may be configured to close, open, stop, take no action, or “move to a previously configured position” on
receipt of the ESD signal. The ESD action may also be configured to override any inhibit signal, the local
selector switch, the local stop switch, an overtorque condition, lost phase, or jammed valve protection.
Motor thermal protection may be bypassed for critical ESD applications in non-hazardous or special
service locations. Disabling the motor thermostat voids all third-party certifications, including Factory
Mutual and CSA.