Emerson 3000 World Class, Instruction Bulletin, b.Method 2, For Load Resistance < 250 Ohms

Instruction Bulletin

Appendix J Rev. 1.2 May 2005

World Class 3000

Explosions can result in death or seri- ous injury. Do not make connections to the HART Communicator's serial port or NiCad recharger jack in an ex- plosive atmosphere.

1.Program IFT analog output to 4-20 mA. Select the current mode using the cur- rent/voltage selector switch on the mi- croprocessor board in the IFT.

2.Using the supplied lead set, connect the HART Communicator in parallel to the IFT 3000. Use any wiring termina- tion points in the analog output 4-20 mA signal line.

b.Method 2, For Load Resistance < 250 Ohms

Explosions can result in death or seri- ous injury. Do not make connections to the HART Communicator's serial port or NiCad recharger jack in an ex- plosive atmosphere.

1.Program IFT analog output to 4-20 mA. Select the current mode using the cur- rent/voltage selector switch on the mi- croprocessor board in the IFT.

2.At a convenient point, break the analog output 4-20 mA signal line and install the optional 250 ohm load resistor.

3.Plug the load resistor into the loop connectors (located on the rear panel of the HART Communicator).

Refer to Figure J-3 and the following steps to connect the HART Communicator to a signal line with less than 250 ohms load re- sistance.

J-5

HART COMMUNICATOR PC

CONNECTIONS

There is an option to interface the HART Com- municator with a personal computer. Load the designated Cornerstone® software into the PC. Then, link the HART Communicator to the PC using the interface PC adaptor which connects to the serial port (on the communicator rear panel).

Refer to the proper HART Communicator docu- mentation in regard to the PC interface option.

J-4 Appendices Rosemount Analytical Inc. A Division of Emerson Process Management