DigitalFlow™ GF868 Startup Guide (1 and 2-Channel) 9
Chapter 1. Installation
1.7.4a Wiring the RS232 Interface 
The RS232 communications port provides a serial interface in order to connect the GF868 to a printer, an ANSI 
terminal or a personal computer. 
The RS232 serial interface is wired as Data Terminal Equipment (DTE), and the signals available at the GF868 RS232 
terminal block are shown in Table 1 below. Refer to Figure 9 on page 18 to locate terminal block RS232 and complete 
the following steps to wire the terminal: 
1. Use the information in Table 1 to construct a suitable cable for connecting the GF868 to the external device. (If 
desired, an appropriate cable may be purchased from the factory.) 
2. Wire the flying leads end of the cable to terminal block RS232 and connect the other end of the cable to the printer, 
ANSI terminal or personal computer. 
After the wiring has been completed, consult the User’s Manual for the external device to configure it for use with the 
GF868.
Table 1: RS232 Connection to DCE or DTE Device
RS232 
Pin #  Signal Description 
DCE DB25 
Pin # 
DTE DB25 
Pin # 
DTE DB9 
Pin # 
1 RTN (Return)  7  7  5 
2 
TX (Transmit)  2  3  3 
3 RX (Receive)  3  2  2 
4  DTR (Data Terminal Ready)  20  20  4 
5  CTS (Clear to Send)  5  4  8