Communications Overview; Front Panel Interface - GE D90 Plus Instruction Manual

PRODUCT DESCRIPTION

Communications overview

Front panel interface

8
Plus
The EnerVista UR Setup software can communicate with the relay through three ports:
the front panel USB port, the rear Ethernet port, and the rear RS485 port. Both rear ports
are located in slot D.
To communicate through the D90
GE Multilin RS232/RS485 converter box is required. This device (catalog number F485)
connects to the computer using a straight-through serial cable. A shielded twisted-pair (20,
22, or 24 AWG) connects the F485 converter to the D90
converter terminals (+, –, GND) are connected to the D90
COM) terminals. Terminate the line with a 120 Ω, 1 nF R-C network.
Communications via Ethernet requires a connection to an Ethernet network using a
standard copper or fiber cable. The Ethernet port can also connect directly to a computer
using a cross-over cable.
To communicate via the faceplate USB port, use a standard USB serial cable. No converter
box is required.
For additional information, refer to:
Main processor module
Information is displayed on the D90
as a digital annunciator and the other reflects display and control functions. The panels
provide easy access and visualization of device information, ranging from the large display
Figure 4: Communications overview
Plus
rear RS485 port from a computer's RS232 port, the
on page 44.
Plus
front panel through two display panels. One serves
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 2: PRODUCT DESCRIPTION
Plus
rear communications port. The
Plus
communication module (+, –,