Micro Motion RFT9709 Manual de Instruções Página 27
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RFT9709 Transmitter Instruction Manual
19
Wiring
continued
Wiring Startup TroubleshootingBefore You Begin Mounting
HART multidrop network
wiring
The Bell 202 physical layer is used for digital communication with the
HART protocol. Devices in a HART multidrop network communicate by
sending and receiving signals to and from one another.
Up to 15 transmitters can be connected using the Bell 202 standard.
Other Rosemount
®
SMART FAMILY
®
transmitters can also participate in
a HART network.
• Using multiple transmitters in a HART network requires assigning a
unique address from 1 to 15 to each transmitter. Assigning an address
of 1 to 15 to the RFT9709 causes the primary mA output to remain at a
constant 4 mA level.
• A HART-compatible control system can communicate with any device
in a HART network over the same 2-wire pair.
Configuration switches on the RFT9709 allow the choice of Bell 202 or
RS-485 physical layers for HART or Modbus
®
communications. Make
sure switches are set as instructed in Section C.2, page 47, before
attempting to use the RFT9709 in a HART multidrop network.
Figure 2-11 shows how to connect multiple transmitters to a host
controller for Bell 202 HART digital communication.
• The Bell 202 standard requires twisted-pair wire.
• SMART FAMILY devices require a minimum loop resistance of
250 ohms. Loop resistance must not exceed 1000 ohms.
• Connect the mA outputs from each transmitter together so they
terminate at a common load resistor, with at least 250 ohms
impedance, installed in series.
Figure 2-11. Typical HART
®
network wiring
PV+
17
PV–
18
PV+
CN2-
Z30
PV–
CN2-
D30
4-20mA
24
DC
PV+
11
PV–
12
For optimum HART communication, make sure the
output loop is single-point grounded to instrument
grade ground.
ProLink
®
PC Interface
(Bell 202)
RFT9739
field-mount
RFT9739
rack-mount
SMART
FAM ILY
®
trans-
mitter
SMART
FAMILY
trans-
mitter
DC source required for
other HART
®
4-20 mA
passive transmitters
RFT9709
IFT9701
Resistor
(250 ohm
load)
09wire.fm Page 19 Monday, March 1, 1999 4:31 PM
- Model RFT9709 1
- Transmitter 1
- Table of Contents 5
- Appendixes 6
- Before You Begin 10
- RFT9709 components 10
- Step 1 Mounting 11
- Mounting 12
- 1.2 Mounting options 12
- 1.3 Installation in user 12
- 1.4 Optional NEMA-housing 13
- Step 2 Wiring 15
- 2.2 Power supply wiring and 16
- 2.3 Sensor wiring 17
- Remotely-installed 19
- Cable connections to 20
- *Combined drain wires 21
- Figure 2-6. Wiring to ELITE 22
- CMF sensors 22
- Figure 2-7. Wiring to BASIS 23
- F, Model D, and DL sensors 23
- Primary and secondary 26
- Figure 2-10 26
- HART multidrop network 27
- Figure 2-11. Typical HART 27
- network wiring 27
- RS-485 output 28
- Figure 2-12. RS-485 wiring 28
- Frequency/pulse output 29
- Figure 2-13 29
- Control output 30
- Figure 2-14 30
- Control output terminals 30
- External zero switch wiring 31
- Figure 2-15 31
- Remote-zero switch wiring 31
- Viscosity measurement or 32
- Table 2-3 32
- Sensors affected by 32
- Step 3 Startup 35
- Startup 36
- Zeroing procedure 36
- Diagnosing zero failure 36
- 3.3 Event registers 37
- Table 3-1 37
- Parameters that affect 37
- 3.4 Totalizer reset 38
- 3.5 Process measurement 38
- Troubleshooting 39
- Switch Settings 40
- 4.3 Interrogation with the 41
- program 41
- Output test and trim 41
- Figure 4-2. ProLink 42
- PC-Interface connections 42
- Installation Step 2 43
- 4.6 Master reset 45
- 4.7 Customer service 45
- A RFT9709 Specifications 47
- RFT9709 Specifications 48
- Functional specifications 48
- API-2540 standard tables 49
- Input for pressure 49
- Hazardous area approvals 51
- B Ordering Information 53
- OUNDATION 54
- C Switch Settings 55
- C.3 Fault output settings 57
- C.4 Security modes 57
- Table C-2. Security modes 57
- Security mode 8 58
- Figure C-2 59
- Diagnostic LED and zero 59
- Appendix 61
- Figure D-1 61
- Configuring open collector 61
- E Decontamination and 63
- Return Goods Policy – USA 63
- IMPORTANT: 64
- F Decontamination and 65
- Return Goods Policy – Europe 65
- See also 69
- Micro Motion Inc. USA 74
- Worldwide Headquarters 74
- Micro Motion Europe 74
- Micro Motion Asia 74
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