Thomas & Betts Limitorque MX Device Net Field Unit manual Network specifications

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

Table 1.1 – Network specifications

Network Size	Up to 63 Nodes
Network Length	Selectable end-to-end network distance varies with speed
	125 Kbps 500 m (1,640 ft)
	250 Kbps 250 m (820 ft)
	500 Kbps 100 m (328 ft)
Bus Topology	Linear (trunkline/dropline); power and signal on the same network cable
Bus Addressing	Multi-Master and Master/Slave special case; polled of change-of-state
	(exception-based)
System Features	Selectable end-to-end network distance varies with speed

Termination resistor (121 ohms) must be used at each end of the network

1.5.1.2MX Field Unit Specifications

•CIP Generic Device Profile (Device Type = 00hex) extended to DNFU requirements

•Group 2 Server

•UCMM capable device

•Predefined Master/Slave Connection Set supporting

•Explicit Connection

•Polled I/O Connection

•Bit-Strobed I/O Connection

•Change of State / Cyclic I/O Connection

•Full support of fragmentation protocol

•Device Heartbeat Message

•Device Shutdown Message

•Offline Connection Set

•Galvanical Isolation: The isolation voltage for the DNFU is up to 1,500 VRMS for 1 minute (1,800 VRMS for 1 second

•Power Supply: The DNFU Interface will be powered from the DeviceNet bus. A switching regulator is

used to generate the internal supply voltage: VCC nominal 5.0 V ± 5 %

•Surge Suppression: The DNFU Interface is equipped with surge suppression for the DeviceNet network data and power lines. Surge suppression is compliant with IEC 61000-6-2:2001.

Environmental conditions

The DNFU environmental parameters are within the same environmental constraints as the actuator.



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