Toolbar - GE 745 TRANSFORMER MANAGEMENT RELAY Instruction Manual

9 745 PC SOFTWARE
The 745PC program can communicate to the 745 via the front panel RS232 port or the rear terminal RS485
ports. Figure 9.2 shows the connections required for the RS232 front panel interface which consists of the fol-
lowing:
• A standard "straight through" serial cable with the SR745 end as a DB-9 male and the computer end as
DB-9 or DB-25 female for COM1 or COM2 respectively.
Figure 9.3 shows the required connections and equipment for the RS485 rear terminal interface. The interface
consists of the following:
• GE Power Management F485 RS232-to-RS485 converter.
• A standard "straight through" serial cable connected from your computer to the GE Power Management
F485 Converter box. The converter box end should be DB-9 male and the computer end DB-9 or DB-25
female for COM1 or COM2 respectively.
Shielded twisted pair (20, 22 or 24 AWG) cable from converter box to the SR745 rear terminals. The converter
box (+, -, GND) terminals end up connected to (B1, B2, B3) respectively. The line should also be terminated in
an RC network (i.e. 120ohm, 1nF) as described in Section 3.2.16: RS485 / RS422 COMMUNICATION PORTS
on page 3–12.
GE Power Management
Figure 9–3: 745PC TOOLBAR SUMMARY
745 Transformer Management Relay
9.1 OVERVIEW

9.1.4 TOOLBAR

Opens the Help window
Opens the Popup Currents window
Hang up
Modem Dial
Sets the communications parameters
Sends the current file to the printer
Saves the current file to disk
Open an existing file
Open a new file
9.1.5 HARDWARE CONFIGURATION
9
9-3