AC-2000 | 8.10/8.11 8
4.2.1 AC-2000 Plus Board Layout
4.2.2 AC-2000 Plus Relays
1. Relays 1 to 19: Each pair of terminals goes to one relay. These relays are fused with a
5-ampere, 250-volt slow blow fuses. The relays are normally open when not powered.
2. Relay 20: Three terminal blocks: This relay normally serves as an alarm relay. It is also
fused with a 5 ampere, 250 volt slow blow fuse, and can serve as an ordinary relay:
o NC: Normally closed contact
o Com: Common contact
o NO: Normally open contact
3. Power: Three terminal blocks:
o Neutral (N): Connect to the Neutral Power line.
o Phase (~): Connect to the Phase Power line.
o Ground (GND): Connect to a solid earth safety ground, normally with the bare safety
ground wire, or a green wire.
4. Ground: Connect the ground wire to the electrical system.
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