Precision Digital Corporation Loop Leader+ PD4-6624, Инструкция по эксплуатации

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PD4-6624 & PD4-6628 Loop-Powered Flow Rate/Totalizers
Instruction Manual
25
Wiring Diagrams
• PD4-6628 installation must be performed in
accordance with Control Drawing LIM4-6600-2 in
order to meet agency approval ratings.
• For ATEX certification, barrier and transmitter must be
ATEX Certified with Entity Parameters and must be
connected per manufacturer’s instructions.
I/O Parameter Table
Loop/Power Connection 4-20 mA HART Output
Ui = 30 V Ui = 30 V
Ii = 175 mA Ii = 175 mA
Pi = 1 W Pi = 1 W
Ci = 0 Ci = 0
Li = 0 Li = 0
Open Collector Outputs Switch Port
Ui = 30 V Ui = 30 V
Ii = 175 mA Ii = 175 mA
Pi = 1 W Pi = 1 W
Ci = 0 Ci = 0
Li = 0 Li = 0
4-20 mA Linear Output Backlight Supply
Ui = 30 V Ui = 30 V
Ii = 175 mA Ii = 175 mA
Pi = 1 W Pi = 1 W
Ci = 0 Ci = 0
Li = 0 Li = 0
Relay Outputs Remote Contacts
Ui = 30 V
Ii = 1.0 A
Pi = 1 W
Ci = 0.013 µF Ci = 0.013 µF
Li = 0 Li = 0
Uo = 11.55 V Uo = 7.01 V
Io = 0.001 A Io = 0.193 A
Po = 0.012 W Po = 0.265 W
Safe Area Current Loop (4-20 mA)
Connections
Signal connections are made to a four-terminal
connector labeled INPUTS. See
Connectors Labeling
on page 24 . The following figures show a 4-20 mA
current loop connected to the meter. Figure 10 shows
the connection without the backlight and Figure 11
shows the connection with the backlight (the backlight
can be disabled/enabled in the
SYSTEM
menu). The
backlight can be powered from the same DC power
source that powers the 4-20 mA loop, but requires
additional wiring as shown in
Figure 11 .
There are no switches or jumpers to set up for the
input. Setup and programming is performed through
the programming buttons or MeterView XL software.
Figure 10. 4-20 mA Input Connection without Backlight
Figure 11. 4-20 mA Input Connection with Backlight
The current input is protected against current
overload up to 1 amp. The display may or may not
show a fault condition depending on the nature of the
overload.
Safe Area Digital Input Connections
A digital input is standard on the meter. This digital
input is connected with a normally open contact
across DI+ and DI-, or with an active low signal
applied to DI+ and DI-.
Figure 12. Digital Input Connections
DI+ DI- mA- mA+
4-20 mA
Transmitter
Power
Supply
DI+ DI- mA- mA+
BL- BL+
4-20 mA
Transmitter
Power
Supply
24 VDC
Power
Supply
DI+ DI- mA- mA+