ABB UNITROL 1020 - Page 27

 Chapter 3 - Device Overview
UNITROL 1020 User Manual 3BHS335648 E82 19
D804
D802
D800
EthernetUSB
Pin
Label
Signal Description
Ethernet
1
Transmitter +
2
Transmitter –
3
Receiver +
4
Do not use [connected to magnetics]
5
Do not use [connected to magnetics]
6
Receiver –
7
Do not use [connected to magnetics]
8
Do not use [connected to magnetics]
LED
Green
ETH Link OK
LED
Yellow
ETH Data Traffic
Ref.
Label
Signal Description
USB
1
USB Power 5V
2
Data -
3
Data +
4
GND
Ref.
Color
Description
Status LEDs
D800
Green
Power ON status
ON: DSP and MCU is powered
Blinking: Target SW is running
D802
Yellow
Excitation ON, Blinking: Limiter active
D804
Red
Device status
ON: Alarm or trip active
Blinking:
Startup failure, target could not load parameters
Excitation output is blocked
Save parameter to EEPROM first before starting excitation