Eltorque QT50 User Manual

Technical Details
User Manual QT50 Doc ID 1321 version 2.0 Sept. 2018
Page 53 of 62
- Activated if GENERAL ALARM is triggered.
Figure 32: Digital control using buttons and lamps or PLC
As shown on the illustration above, actuators with digital interface can be
controlled directly from a conventional panel with buttons/ switches and
indicator lamps. Alternatively, it can be controlled from a controller with Digital
inputs and outputs. This allows extended functionality in terms of automatic
control and visual user interface on display.
In case both the Close and Open signals are active simultaneously, the actuator
opens. Both input and output signals can use pulses of minimum 100ms length
or constant signals.
The outputs provide feedback of the actuator’s status, such as Closed, Open
and/or Alarm.
The following failure scenarios trigger an alarm:
 Manual emergency operation
 Valve position out of defined operation area
 Valve blocked
 High temperature
Analog interface
The feedback is polarity sensitive. Both positioning and feedback signals are
analog 4-20 mA. The Analog Interface also has a digital Alarm output, which is
trigged by failures in both actuator and valve.

Eltorque QT50 Specifications

General

Brand	Eltorque
Model	QT50
Category	Controller
Language	English