Thomas & Betts Limitorque MX Device Net Field Unit manual DeviceNet Field Unit

Limitorque MX DeviceNet Field Unit  FCD LMENIM2328-00 – 11/05

The MX features include:

•Non-intrusive setup

•Separately sealed terminal chamber

•Patented absolute encoder for valve position sensing (no battery required)

•32-character LCD for indication and calibration with configuration permitted in six languages.

•Sophisticated electronic control, monitoring, and diagnostic capabilities with patented LimiGard™ technology

2.2.2DeviceNet Field Unit

The DeviceNet field unit is installed in the MX controls compartment. This unit permits the actuator to be controlled by a host controller, typically a PLC, via the DeviceNet network. The DNFU includes two high-level, surge-protected, and isolated network communication channels, configurable digital I/O, and configuration via LCD screen. The following commands and information may be transmitted over the DeviceNet network:

•“OPEN,” “STOP,” and “CLOSE” commands

•“ESD” and “MOVE–TO” position commands

•Actuator status and alarm messages

•Six digital inputs and two analog inputs for user

•A surge-protected and isolated communication channels

•MX control panel configuration

•Torque output (for reference only) and position feedback

•Four digital outputs (standard)

Figure 2.2 – DeviceNet Field Unit

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