Micro Motion RFT9709 Bedienerhandbuch Seite 23

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Seitenansicht 22
Using ProLink
®
Software with Micro Motion
®
Transmitters
9
Getting Started
continued
Wiring to the transmitter
File Menu: Print File Menu: Log Files View Menu: VariablesBefore You Begin Getting Started File Menu: Database
Figure 2-3. Bell 202 temporary connection to rack-mount transmitters
Notes for Figure 2-3
1.
If necessary, add resistance in the loop by installing resistor R1. SMART FAMILY devices require a minimum loop resistance of
250 ohms. Loop resistance must not exceed 1000 ohms, regardless of the communication setup.
2.
The DCS or PLC must be configured for an active milliamp signal.
3.
Resistor R3 is required if the DCS or PLC does not have an internal resistor.
4.
Resistor R4 is required if the illustrated transmitter output wiring is not connected to an input device. Required loop resistance:
minimum 250 ohms, maximum 1000 ohms. Wrap ends of resistor around prongs of plug before inserting into jack.
CAUTION
Connecting a HART device to the transmitter’s HART jack could cause transmitter output error.
If the primary variable analog output is being used for flow control, connecting a PC interface adaptor to the HART
jack could cause the transmitter 4-20 mA output to change, which would affect flow control devices.
Set control devices for manual operation before connecting a PC interface adaptor to the transmitter’s HART jack.
R1
(Note 1)
R3
(Note 3)
DCS or PLC
with internal
resisitor
(Note 2)
R2
Z30D30
CN2
B14
B16
CN2
R4
(Note 4)
Connect two Bell 202 cables
Second Bell 202 cable
not included
R4
(Note 4)
Connect two Bell 202 cables
Second Bell 202 cable
not included
Receive
Transmit
Power
Low Batt
AC
Adaptor
202 Off 485
202
485
A
B
Receive
Transmit
Power
Low Batt
AC
Adaptor
202 Off 485
202
485
A
B
RFT9739
rack-mount
RFT9729
HART jack same as primary mA output
wiring circuit at left
HART jack
same as primary mA output
wiring circuit at left
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