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GETTING STARTED
1.3
M-RELAY FAMILY HARDWARE
1.3.1.
MOUNTING & WIRING
Please refer to the HARDWARE chapter for detailed relay mounting and wiring instructions. Review all WARNINGS
and CAUTIONS.
1.3.2.
COMMUNICATIONS
The ENERVISTA MII SETUP software can communicate to the relay via the faceplate RS232 port, or the rear panel
RS485. To communicate with the relay via the faceplate RS232 port, a standard "straight through" serial cable is
used. The DB9 male end is connected to the relay and the db9 or DB25 female end is connected to the PC COM1 or
COM2 port as described in the HARDWARE chapter.
To communicate with the relay rear RS485 port from a computer RS232 port, an RS232/RS485 converter box is
needed. We recommend to use the F485 converter, manufactured by GE. This converter box is connected to the
computer using a "straight through" serial cable. A shielded twisted pair (20, 22 or 24 AWG according to the American
2
standards; 0.25, 0.34 or 0.5 mm
according to the European standards) cable is used to connect the converter box to
the relay rear communications terminals. The converter box (-, +, GND) terminals are connected to the relay (SDA,
SDB, GND) terminals respectively. For long communications cables (longer than 1 km), the RS485 circuit must be
terminated in a RC network (i.e. 120 ohm, 1 nF) as described in the HARDWARE chapter.
1.3.3.
FACEPLATE KEYPAD & DISPLAY
Display messages are organised into menus under the main headings: Information, Main Settings, Advanced
Settings, Operations and Date/Time. A 3-key keypad and a 3.5-character display (shown below) are used as
elementary local HMI.
GE Power Management
e
M enu
Esc
-
+
Enter
Figure 1.1 MIF KEYPAD AND DISPLAY
Using this keypad it is possible to access all the different menus in the relay, to view settings and measurements, and
to change settings.
1-10
MIF Digital Feeder Protection
GEK-106273L
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