PDA7485 RS-232 to RS-485 Converter gure 3
Configure any Vantageview PD6730X Safe Area Modbus
Scanner or any ProtEX PD6830X Explosion-Proof Hazardous
Area Modbus Scanner using the PC-based ScanView EX
software. ScanView EX is available as a free download at
www.predig.com/ScanViewEX (adapter or converter required for
most PC applications).
ScanView EX makes complete scanner configuration quick and
easy. Copying one scanner configuration to another, as well
as saving or retrieving a scanner’s configuration file, is a snap.
ScanView EX’s intuitive layout and easy-to-understand interface
make any scanner configuration simple to complete.
A PDA8068 PD6830X/PD6730X-to-USB adapter is available for a
quick & easy PC connection. ScanView EX is an extremely useful
tool that eliminates a lot of button pushing and minimizes any
confusion when setting up a PD6730X or PD6830X.
2
Connect - Startup Window gure 1
PDA7485
RS-232
RS-485
Use a PDA7485 to connect directly from a PD6730X/PD6830X to
a PC. The PDA7485 connects via RS-485 wires from the scanner,
and via an RS-232 cable out to a PC. Use the diagrams below to
make sure the wiring is correct and the DIP switch is in the proper
position.
Serial Communication Converters & Adapters Instruction Manual
10
Alpha 6203C. A two-wire system requires two twisted pairs, and a four-
wire system requires three twisted pairs (the extra twisted pair is
needed for the signal ground).
Figure 1 illustrates how to connect a general four-wire network (a four-
wire network actually contains 5 wires).
PDA8485
DO
DO
DI
DI
GND
DO
DO
DI
DI
GND
RS-422/485 DEVICE
Figure 1. General Four-Wire Network Connection
Figure 2 illustrates how to connect a general two-wire network (a two-
wire network actually contains 3 wires). Note that the PDA7485 and
PDA8485 have DIP switches that allow for two-wire connections without
the need to externally wire the DO to the DI and the /DO to the /DI (see
the converter section for complete details).
PDA8485
DATA
DATADO
DO
DI
DI
GND GND
RS-485 DEVICE
Figure 2. General Two-Wire Network Connection
PDA7485
Serial Communication Converters & Adapters Instruction Manual
37
Connections
The PDA8485 is powered by the USB port.
The PDA8485 can be configured for either a four-wire or two-wire net-
work. Figure 26 details the wiring connections from the PDA8485 to an
RS-422/485 serial device in a four-wire network.
Figure 26. Connections for PDA8485 in a Four-Wire Network
Figure 27 details the wiring connections from the PDA8485 to an
RS-422/485 serial device in a two-wire network when the DIP switches on
the PDA8485 have been set to the “2-Wire Mode”.
Figure 27. Connections for PDA8485 in a Two-Wire Network
The PDA8485 internally connects the /DI to the /DO and the DI to the DO
when the DIP switches are set to “2-Wire Mode”. Either the /DI or /DO
could be used to connect to /DATA and either the DI or DO could be used
to connect to DATA.
PDA8485 to RS-422/485 Serial
Device Four-Wire Connections
PDA8485 Serial
Converter
RS-422/485 Serial
Device
DO DI
DO DI
DI DO
DI DO
PDA8485 to RS-422/485 Serial
Device Two-Wire Connections
PDA8485 Serial
Converter
RS-422/485 Serial
Device
DO DATA
DO DATA
Serial Communication Converters & Adapters Instruction Manual
30
Connections
To power the PDA7485, connect 12 VDC to the +12VDC and ground to
the GND screw terminals from the supplied 115 VAC/12 VDC adapter.
The PDA7485 may be configured for either a four-wire or two-wire net-
work. Figure 16 details the wiring connections from the PDA7485 to an
RS-422/485 serial device in a four-wire network.
PDA7485 to RS-422/485 Serial Device Four-Wire Connections
PDA7485 Serial Converter RS-422/485 Serial Device
DO DI
DO DI
DI DO
DI DO
Figure 16. Connections for PDA7485 in a Four-Wire Network
Figure 17 details the wiring connections from the PDA7485 to an
RS-422/485 serial device in a two-wire network when the DIP switches on
the PDA7485 have been set to the “2-Wire Mode”.
PDA7485 to RS-422/485 Serial Device Two-Wire Connections
PDA7485 Serial Converter RS-422/485 Serial Device
DO DATA
DO DATA
Figure 17. Connections for PDA7485 in a Two-Wire Network
The PDA7485 internally connects the /DI to the /DO and the DI to the DO
when the DIP switches are set to “2-Wire Mode”. Either the /DI or /DO
could be used to connect to /DATA and either the DI or DO could be used
to connect to DATA.
Two PDA7485 RS-232 to RS-422/485 Serial Converters could be used
as a serial extender to allow RS-232 serial devices to communicate over
long distances. This would allow an RS-232 device to operate up to
3,937’ (1,200 m).
Serial Communication Converters & Adapters Instruction Manual
30
Connections
To power the PDA7485, connect 12 VDC to the +12VDC and ground to
the GND screw terminals from the supplied 115 VAC/12 VDC adapter.
The PDA7485 may be configured for either a four-wire or two-wire net-
work. Figure 16 details the wiring connections from the PDA7485 to an
RS-422/485 serial device in a four-wire network.
PDA7485 to RS-422/485 Serial Device Four-Wire Connections
PDA7485 Serial Converter RS-422/485 Serial Device
DO DI
DO DI
DI DO
DI DO
Figure 16. Connections for PDA7485 in a Four-Wire Network
Figure 17 details the wiring connections from the PDA7485 to an
RS-422/485 serial device in a two-wire network when the DIP switches on
the PDA7485 have been set to the “2-Wire Mode”.
PDA7485 to RS-422/485 Serial Device Two-Wire Connections
PDA7485 Serial Converter RS-422/485 Serial Device
DO DATA
DO DATA
Figure 17. Connections for PDA7485 in a Two-Wire Network
The PDA7485 internally connects the /DI to the /DO and the DI to the DO
when the DIP switches are set to “2-Wire Mode”. Either the /DI or /DO
could be used to connect to /DATA and either the DI or DO could be used
to connect to DATA.
Two PDA7485 RS-232 to RS-422/485 Serial Converters could be used
as a serial extender to allow RS-232 serial devices to communicate over
long distances. This would allow an RS-232 device to operate up to
3,937’ (1,200 m).
PDA8068 Meter to USB Adapter gure 2
PDA8068
with Ribbon
USB
27
and Display
Settings Lockout Password
Enabled
SafeTouch Power
Save/Disable.
Flashing: Temporarily Disabled
Due to Mechanical Button
Total Display
Flashing: Total Overflow
Indication
Grand Total Display
Flashing: Total Overflow
Indication
13 Digit Total Overflow, 6 Most
Significant Digits
Flashing: Low Battery Indicator
Steady: Powered by Battery
Backup
PDA8068 ribbon connects at the back of the
electronics module, accessed by removing the
scanner cover. USB cable included with PDA8068.
Use PDA8068 to connect directly from a PD6730X/PD6830X to a PC.
Serial Communication Converters & Adapters Instruction Manual
28
Installation
The DIP switch SW1 allows for several different options. Factory set-
tings for the switch are shown in Figure 13.
12345
Figure 13. PDA7485 Terminal Connectors and DIP Switch
The TERM switch position adds an internal 120 ohm termination resistor
when ON (up). Termination should be used on both ends of the network
with high data rates and long wiring runs.
To configure a two-wire network set both of the 2 WIRE switch positions
to ON (up). For a four-wire network set both of the 2 WIRE switches to
OFF (down).
When the RS422 switch position is ON (up) it is configured for an
RS-422 network. For RS-485 networks set the RS422 switch to OFF
(down).
The ECHO switch position allows the data being sent from the RS-232
port to be echoed back into the RS-232 port. In most networks, this is
an undesired effect and the ECHO switch would be OFF (down).
Figure 14. PDA7485 DIP Switch Settings
PDA7485 DIP Switch Settings
SW1 Switch Position ON Setting Function
1 Network Termination Included
(120 ohm)
2 2-Wire Network Mode Connection
(factory setting)
3 2-Wire Network Mode Connection
(factory setting)
4 RS-422 Mode
5 ECHO Mode
Serial Communication Converters & Adapters Instruction Manual
28
Installation
The DIP switch SW1 allows for several different options. Factory set-
tings for the switch are shown in Figure 13.
12345
Figure 13. PDA7485 Terminal Connectors and DIP Switch
The TERM switch position adds an internal 120 ohm termination resistor
when ON (up). Termination should be used on both ends of the network
with high data rates and long wiring runs.
To configure a two-wire network set both of the 2 WIRE switch positions
to ON (up). For a four-wire network set both of the 2 WIRE switches to
OFF (down).
When the RS422 switch position is ON (up) it is configured for an
RS-422 network. For RS-485 networks set the RS422 switch to OFF
(down).
The ECHO switch position allows the data being sent from the RS-232
port to be echoed back into the RS-232 port. In most networks, this is
an undesired effect and the ECHO switch would be OFF (down).
Figure 14. PDA7485 DIP Switch Settings
PDA7485 DIP Switch Settings
SW1 Switch Position ON Setting Function
1 Network Termination Included
(120 ohm)
2 2-Wire Network Mode Connection
(factory setting)
3 2-Wire Network Mode Connection
(factory setting)
4 RS-422 Mode
5 ECHO Mode
WARNING: Observe all safety regulations. Electrical wiring should
be performed in accordance with all agency requirements and
applicable national, state, and local codes to prevent damage to
the meter and ensure personnel safety.
PDA7485
Terminal
Connectors/
DIP Switch
PD6730X/PD6830X
With ScanView EX software, there are a variety of options to connect
your Vantageview PD6730X or ProtEX PD6830X scanner to a PC
for programming, depending on the PC’s available hardware.
To connect a PC with a USB connection directly to a PD6730X/
PD6830X, use the PDA8068, a PD6830X/PD6730X to USB
adapter as seen in . To do so, begin by removing the cover
from the scanner. Turn the spring-loaded thumb screws on the
faceplate counter-clockwise and remove the electronics module
from the enclosure carefully. Turn the electronics module over to
expose the ribbon connector at the rear. The ribbon connection is
made to the connection board of the scanner; disconnect the ribbon
from the connection board by pushing the connector tabs to the
outside. Connect the PDA8068 to the electronics module using the
the ribbon connector and plug the USB connection into the PC.
Start up ScanView-EX software and you are ready to begin
programming. Once programming has been completed, simply
disconnect the adapter from the electronics module and reconnect
the connector board to the electronics module. Screw the
electronics module back into the enclosure and put the cover back
on the scanner.
To connect a PC with an RS-232 connection to a PD6730X/PD6830X,
use the PDA7485, an RS-485 to RS-232 adapter, as seen in
. The scanner uses a two-wire RS-485 connection. The
PDA7485 contains ve terminal connections plus a ve position
DIP switch. The factory settings allow the adapter to work in this
conguration. Check the connections, using the the information in
, to be sure they are correct. Connect the PDA7485 to the
PC using an RS-232 cable. Start up ScanView-EX software and
you are ready to begin programming.
