Siemens 7MF4033 series, Руководство пользователя

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UMSITRPDS3-1 Installation
November 2010
4-15
+
_
- +
4-20 mA
MG
00351a
Hazardous
Location
Non-Hazardous
Location
Network
Primary
Master
See Note 1
+
I
O
Transmitter 1
See Notes 3 & 6
250
See Note 2
See Note 4
See Note 5
_
+
_
System
Power Supply
Transmitter 2
See Notes 3 & 6
Transmitter 15
See Notes 3 & 6
+
_
- +
4-20 mA
+
_
- +
4-20 mA
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.
FIGURE 4-9 Multi-Drop Network (Digital Mode)