Emerson IFT9701 Communication tools connected to milliamp output, Hart Communicator connections

Power Supply and Output Wiring continued

4.4.3Communication tools connected to milliamp output

ProLink II software from Micro Motion, AMS software from Emerson Process Management, or a HART Communicator can be connected to the flowmeter’s milliamp output.

To connect using ProLink II, follow the instructions in the ProLink II manual. The AMS interface is similar to the ProLink II interface. See the AMS manual for AMS-specific information.

To connect using a HART Communicator:

•Use the Bell 202-compatible cable that is supplied with the HART Communicator.

•Refer to the illustration and instructions below for wiring instructions.

Figure 4-5 HART Communicator connections

4–20 mA terminals

HART

Communicator

R1

(Note 1)

R3

(Note 3)

DCS or PLC

R2 with internal resistor (Note 2)

4–20 mA terminals for communicator hook-up

(1)If necessary, add resistance in the loop by installing resistor R1. SMART FAMILY® devices require a minimum loop resistance of 250 ohms. Loop resistance must not exceed 600 ohms, regardless of the communication setup.

(2)The DCS or PLC must be configured for an active milliamp signal.

(3)Resistor R3 is required if the DCS or PLC does not have an internal resistor.

CAUTION

Connecting a HART device to the IFT9701 milliamp output loop could cause transmitter output error.

If the primary variable is being used for flow control, connecting a HART device to the milliamp output loop could cause the transmitter 4–20 mA output to change, which would affect flow control devices.

Set control devices for manual operation before connecting a HART device to the IFT9701 milliamp output loop.

24 Model IFT9701 Transmitter Instruction Manual