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The 4120-3003 and 4100-3203 Relay Modules ⎯ both of which consist of the 565-045 Daughter
Card and the 562-727 Motherboard ⎯ include eight relays. Each relay controls one set of
contacts and a separate 5 A fuse protects each contact. Eight feedback circuits, which are typically
used to monitor the state of a separate set of contacts (such as the sail switch on a damper or the
NO or NC contacts on a motor), are also provided.
All contacts are Form C, dry contacts, meaning the Common terminal is connected to the
Normally Closed terminal when the relay’s coil is in the de-energized state. The maximum load
that can be wired to the contacts is 3 A at 30 VDC or 0.5 A at 120 VAC. Refer to Error!
Reference source not found. for the designations of the contacts and feedback circuits. All
wiring connections are made to the 562-727 Motherboard.
Figure 17. Wiring Connections for 4100/4120-3003 and 4100-3203 Relay Modules
Wiring, Continued
Relay / 3 Amp
Module
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