Emerson Process Management IM-106-340 instruction manual Hart Communicator Signal Line Connections

Oxymitter 4000

Instruction Manual

IM-106-340, Rev. 4.0 May 2006

HART COMMUNICATOR SIGNAL LINE CONNECTIONS

The HART Communicator can connect to the Oxymitter 4000's analog output signal line at any wiring termination in the 4-20 mA current loop. There are two methods of connecting the HART Communicator to the signal line. For applications in which the signal line has a load resistance of 250 ohms or more, refer to method 1. For applications in which the signal line load resis- tance is less than 250 ohms, refer to method 2.

Method 1, For Load Resistance ≥ 250 Ohms

HART COMMUNICATOR PC CONNECTIONS

Refer to Figure 7-1 and the following steps to connect the HART Communica- tor to a signal line < 250 ohms or more of load resistance.

Explosions can result in death or serious injury. Do not make connections to the HART Communicator's serial port, 4-20 mV signal line, or NiCad recharger jack in an explosive atmosphere.

Using the supplied lead set, connect the HART Communicator in parallel with to the Oxymitter 4000. Use any wiring termination points in the analog output 4-20 mA signal line.

Method 2, For Load Resistance < 250 ohms

Refer to Figure 7-2 and the following steps to connect the HART Communica- tor to a signal line with < 250 ohms load resistance.

Explosions can result in death or serious injury. Do not make connections to the HART Communicator's serial port, 4-20 mV signal line, or NiCad recharger jack in an explosive atmosphere.

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

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

There is an option to interface the HART Communicator with a personal com- puter. Load the designated AMS software into the PC. Then link the HART Communicator to the PC using the interface PC adapter that connects to the serial port (on the communicator rear panel).

Refer to the proper HART Communicator documentation in regard to the PC interface option.

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