Chapter 1. Installation
12 DigitalFlow™ XGM868i Startup Guide
1.7.4a Wiring the RS232 Interface (cont.)
Refer to Figure 10 on page 25 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 XGM868i 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 XGM868i 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 has been completed, consult the User’s Manual for the external device to configure it for use with the
XGM868i.
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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