Multi-Drop Network (Digital Mode) - Siemens 7MF4033 series User Manual

UMSITRPDS3-1
See Note 4
Network
Primary
Master
See Note 1
I
O
System
Power Supply
Transmitter 1
See Notes 3 & 6
1. The system power supply is shown separate from the host input device. In practice, it may be part of the host
input device. The host input device can be a HART or non-HART signaling device, a Primary Master or a
Secondary Master.
2. Network resistance equals the sum of the barrier resistances and the current sense resistor. Minimum value is
250 Ohms; maximum value is 1100 Ohms.
3. A maximum of 15 transmitters may be connected. All must be configured for digital mode.
4. Connect the HART Communicator as shown in Figure 2-2 for hazardous or non-hazardous locations. The HART
Communicator is a non-polar device.
5. Supply and return barriers are shown. Interconnect all cable shields and ground only at the barriers.
6. For access to transmitter field terminals, remove the enclosure cap.
November 2005
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4-20 mA
FIGURE 4-9 Multi-Drop Network (Digital Mode)
Non-Hazardous Hazardous
Location
250
See Note 2
See Note 5
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4-20 mA
Transmitter 2
See Notes 3 & 6
Location
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- +
4-20 mA
Transmitter 15
See Notes 3 & 6
Installation
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4-15