Emerson Process Management IM-106-910Xi instruction manual Operation VIA HART/AMS

Xi Advanced Electronics

Instruction Manual

IM-106-910Xi, Original Issue November 2010

OPERATION VIA

HART/AMS

Field Communicator Signal Line Connections

The 375/475 Field Communicator is a handheld communications interface device. It provides a common communications link to all microprocesor-based instruments that are HART compatible. The handheld communicator contains a liquid crystal display (LCD) and 21 keys. A pocket-sized manual, included with the 375/475 Field Communicator, details the specific functions of all the keys.

The 375/475 Field Communicator accomplishes its task using a frequency shift keying (FSK) technique. With the use of FSK, high-frequency digital communication signals are superimposed on the Xi's 4-20 mA current loop. The 375/475 Field Communicator does not disturb the 4-20 mA signal, since no net energy is added to the loop.

NOTES

The 375 Field Communicator must be upgraded to System Software 2.0 with Graphic License for operation with the Xi. The AMS software must be upgraded to AMS 8.0 or above for operation with the Xi.

Contact Emerson Process Management’s Global Service Center (GSC) at

1-800-833-8314 to upgrade the 375 Field Communicator software to System Software 2.0 with Graphic License.

When working at the Xi, the 375/475 Field Communicator can be connected directly to test points TP21 and TP22 on the Xi I/O Board as shown in Figure 4-3. The AM+ and AM- test points are provided to monitor the 4-20 mA signal without breaking into the loop.

Figure 4-3. 375/475 Field Communicator Connection at the Xi

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