ABB REX 521 - Page 10

10
1MRS 751107-MUM
Protection Relay
Operator’s Manual
REX 521
Fig. 3.1.-1 HMI front view
1. Alarm LEDs
2. LED indicator: Trip, CBFP
3. LED indicator: Start, Block
4. LED indicator: Ready, IRF, Test mode
5. LCD
6. Optical PC connector
7. Navigation buttons
8. Clear/Cancel
9. Enter
REX 521_face_a
REX 521
READY
START
1
2
3
4
5
6
7
8
9
TRIP
E
C