Figure 2: CT24-9 MCU
This MCU has two main contactor safety relays with one fuse and one pair of terminals, seven N/O relays and two
C/O relays. The following items are identified in Figure 2:
1. Status LEDs on micro board
2. TransKey inserted in slot inside enclosure
3. Seven N/O function relays
4. Terminal main input voltage
5. Fuse main input
6. Removable terminal strip for function relays
7. Fuse for main contactor safety relays
8. Terminal strip for main contactor safety relays
9. Two main contactor safety relays
10. Two C/O function relays
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