Terminal Number Opto-input
Terminal 1 Opto 1 -ve
Terminal 2 Opto 1 +ve
Terminal 3 Opto 2 -ve
Terminal 4 Opto 2 +ve
Terminal 5 Opto 3 -ve
Terminal 6 Opto 3 +ve
Terminal 7 Opto 4 -ve
Terminal 8 Opto 4 +ve
Terminal 9 Opto 5 -ve
Terminal 10 Opto 5 +ve
Terminal 11 Opto 6 -ve
Terminal 12 Opto 6 +ve
Terminal 13 Opto 7 –ve
Terminal 14 Opto 7 +ve
Terminal 15 Opto 8 –ve
Terminal 16 Opto 8 +ve
Terminal 17 Common
Terminal 18 Common
6.7 STANDARD OUTPUT RELAY BOARD
Figure 19: Output relay board - 8 contacts
This output relay board has 8 relays with 6 Normally Open contacts and 2 Changeover contacts.
The output relays can drive any circuit requiring logical inputs such as circuit breakers, blocking signals, and
PSL schemes.
MiCOM P747 Chapter 3 - Hardware Design
P747-TM-EN-1 47
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