User Manual QT250 and QT800 gen 2.5, ID 2021 2.3 20. April 2021
Table 4: Terms and abbreviations
American Bureau of Shipping.
Asbestos Free Declaration.
Step-less control utilizing analog signals, e.g. 4-20 mA. Allows positioning of the
valve actuator between Open and Closed.
Break to open. The torque required to unseat the closed valve.
Controller Area Network.
CAN bus is a fieldbus which allows communication between a maximum of 127
actuators connected to the same network. It is not a “master-slave” network (ref.
Modbus), hence all the nodes in the network can actively send messages at their
own initiative. Communication is prioritized meaning that urgent messages are
transmitted and received before information with lower priority. Compared to
Modbus, CAN bus has quite a few advantages:
− More reliable communication
− More nodes per network
− More control and configuration features are available
− Higher performance
CANopen is a higher-level protocol and is running on top of the CAN protocol for
all Eltorque actuators.
The standard consists of an addressing scheme for the nodes on the CAN bus
and several small protocols for communicating with each node. In terms of the
OSI model, CANopen implements the levels above, including the network layer.
Communication
Interface Box
Electronic device controlling the actuator according to signals from an overall
control system such as a PLC or other type of electronic controller.
The set-up of parameters, which affects the actuator’s performance and
behavior.
Simple control utilizing relays, on/ off switches and indicators. Allows only Open
or Closed functionality for a valve actuator.
Det Norske Veritas Germanischer Lloyd.
Eltorque Common Configuration Controller.
Eltorque Valve Control Interface
Eltorque Valve Control System offers a dedicated control system
for operation of Eltorque actuators.
Eltorque Valve Control System is suitable for installations where the operator
requires full control of all valves and pumps, and in addition monitor level,
temperature, flow and pressure.
Area in which the permanent or periodical presence of explosive substances
causes a risk of explosion.
Products described in this manual are not suitable for use in hazardous areas.
Eltorque can deliver actuators for use in such areas if required. Please contact
your local representative for further details.
Health, Safety and Environment.
Heath, ventilation and air condition
To Next Page
Loading...
