CHAPTER 3: INSTALLATION TYPICAL WIRING
745 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL 3–19
FIGURE 3–18: RS422 wiring
3.2.16 RS232 Front Panel Program Port
A 9 pin RS232C serial port is located on the front panel for programming through a PC. This
port uses the same Modbus protocol as the two rear ports. The EnerVista 745 Setup
software required to use this interface is included with the relay. Cabling for the RS232 port
is shown below for both 9 pin and 25 pin connectors.
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