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Datamate 2200 O&M
Page 26
5.8 HART
®
(Option Card) Wiring Connections
• Up to 10 transmitters can be connected into a HART multi-drop network.
• Using multiple transmitters in a HART
®
compatible network requires assigning a unique
address of 1 to 15 to each transmitter
• Assigning an address of 1 to 15 to the transmitter causes the primary 4-20mA output to
remain at a constant 4mA level
• The primary 4-20mA output MUST produce a 4-20mA current for the HART physical
layer
Figure 5.8.1 shows how to connect wiring for a HART
®
compatible network. Connect the
4-20mA outputs from each transmitter together so they terminate at a common load
resistor, installed in series, with approximately 250 ohms impedance. Figure 5.9.1
illustrates the handheld communicator connections for configuring the Datamate 2200
via HART.
Figure 5.8.1: HART
®
Network Wiring
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