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DigitalFlow™ XGS868i Startup Guide
11
Chapter 1. Installation
1.7.4.1
Wiring the RS232 Interface
Use the serial port to connect the Model XGS868i flow transmitter to a printer, an ANSI terminal or a personal
computer. The RS232 interface is wired as Data Terminal Equipment (DTE). Table 1 lists the standard cables available
from the factory for this purpose.
Each of the cables listed inTable 1 is available in several standard lengths. A user-supplied cable may be used, if
preferred. In either case, wire the XGS868i end of the serial cable using the pin designations listed in Table 2.
Refer to Figure 10 on page 23 to complete the following steps:
WARNING!
Dangerous voltages exist within the electronics enclosure. Do not attempt to wire the unit until the
main power has been disconnected
1.
Disconnect the main power and remove the rear cover.
WARNING!
The XGS868i must be moved to a safe environment before removing either cover.
2.
Install the required cable clamp in the chosen conduit hole on the side of the electronics enclosure.
3.
Use the information in Table 2 to construct a suitable cable for connecting the Model XGS868i to the external
device. If desired, an appropriate cable may be purchased from the factory.
4.
Feed the cable’s flying leads through the conduit hole and wire it to terminal block J1. Connect the other end of
the cable to the external serial device and secure the cable clamp.
After the wiring is complete, consult the external device’s
User’s Manual to configure it for use with the XGS868i.
Table 1: Panametrics Serial Cables
Part Number
PC Connector
XGS868i Connector
704-659
DB-25 Male
Flying Leads (5)
704-660
DB-9 Male
Flying Leads (5)
704-661
DB-25 Female
Flying Leads (5)
704-662
DB-9 Female
Flying Leads (5)
Table 2: RS232 Connection to DCE or DTE Device
J1
Pin #
Signal
Description
DCE DB25
Pin #
DCE DB9
Pin #
DTE DB25
Pin #
DTE DB9
Pin #
5
DTR (Data Terminal Ready)
20
4
20
4
6
CTS (Clear to Send)
4
7
5
8
7
COM (Ground)
7
5
7
5
8
RX (Receive)
2
3
3
2
9
TX (Transmit)
3
2
2
3
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