Xtralis VESDA ECO - Page 29

VESDA ECO Detector by Xtralis Product Guide
17898_05 Installation 19
Figure 9 Relay Terminal Connections
The terminals of Relays 1 to 3 are physically connected to the Normally Closed
contacts of the relays. The Relay 4 terminals are connected to the Normally Open
contacts of the relay. “Normally” refers to the state when the ECO is unpowered.