Point-To-Point Network (Analog Mode) - Siemens 7MF4333 User Manual

UMSITRPDS3-1
Controller,
+
Recorder,
Indicator, or
other 1-5 Vdc
Device
_
See Note 1
_
System Power
Supply
+
Network for Non-Hazardous Locations
Controller,
Recorder,
Indicator, or
other 1-5 Vdc
Device
I
O
See Note 1
System Power
Supply
See Note 3
Network for Hazardous Locations
The system power supply is shown separate from the host input device. In practice, it may be part of the host input
device. This device can be a HART or non-HART signaling device, a Primary Master, or a Secondary Master.
Network resistance equals the sum of the barrier resistances and the current sense resistor. Minimum value is 250
Ohms; maximum value is 1100 Ohms.
Connect the HART Communicator as shown in Figure 2-2 for hazardous and non-hazardous locations. The HART
Communicator is a non-polar device.
Supply and return barriers are shown. Interconnect all cable shields and ground only at the barriers.
For access to transmitter field terminals, remove the enclosure cap.
Maximum loop cable length is as calculated using the formula in Section 4.3.6.
FIGURE 4-6 Point-To-Point Network (Analog Mode)
November 2010
Network
250
Junction
See Note 2
Non-Hazardous
250
See Note 2
+
_
See Note 4
+
_
See Note 6
See Note 3
Hazardous
Location Location
Installation
Transmitter
Terminals
See Note 5
_
+
- +
4-20 mA
I
O
See Note 6
_
+
- +
4-20 mA
Transmitter
Terminals
See Note 5
4-11