ABB RD3P - Page 19

ONOFF
Pre Alarm
Autoreset
OUTPUT Relay
Prealarm / TRIP
7 8 9
FAIL SAFE
OUTPUT Relay
TRIP
10 11 12
OUTPUT Relay
Prealarm / TRIP
7 8 9
10 11 12
ONOFF
Pre Alarm
Autoreset
ON
ON
7 8 9
FAIL SAFE
OUTPUT Relay
TRIP
10 11 12
7 8 9
10 11 12
Functions
Fail-safe → incorporated in the device (positive safety device) When no
current is input to the RD3 device, the output contacts number 10 11 12
will switch as shown in the figure below.
Contact status when the device is switched off:
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ABB_76x88mm_RD3P_rev4.indd 19 19/09/11 11:04