Emerson Smart Wireless THUM Adapter Manuel d'installation télécharger pdf (Page 47)

Reference Manual

00809-0100-4075, Rev CA

Appendix A: Reference Data

March 2014

Reference data

Appendix A Reference data

Functional specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 39

Physical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 39

Performance specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 40

Dimensional drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 41

Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 43

A.1 Functional specifications

Input

Any 2- or 4-wire HART powered device.

Output

IEC 62591 (WirelessHART)

Humidity limits

0–100% relative humidity

Update rate

User selectable, 8 sec. to 60 min.

A.2 Physical specifications

Electrical connections

The THUM is connected into a powered 4–20 mA loop, powering itself by scavenging power.

The THUM causes a voltage drop across the loop. The drop is linear from 2.25 volts at 3.5 mA to

1.2 volts at 25 mA, but does not effect the 4–20 mA signal on the loop. Under fault conditions,

the maximum voltage drop is 2.5 volts.

Power supply

Minimum load on loop 250 Ohms.

To maintain normal operating functions of the sub-device, the power in the loop must have at

least a 2.5 V margin at a 250 Ohm load.

Limit power supply to 0.5 Amps maximum.

Limit power supply to 55 Vdc maximum.

Field Communicator connections

Utilize sub-device HART connections.

Materials of construction

Housing option D - Low-copper aluminum

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Emerson Smart Wireless THUM Adapter Manuel d'installation Page 47