FIGURE 11.8.Dry contact inputs on an alarm controller with EOL resistors. When DC power fails or is disconnected, the dry contact outputs will cause the relay to de-energize, thus sending a signal for an event trigger. Normally Open (NO) and Normally Closed (NC) are used to describe how...
Restricted Options: • The loss of AC signal is defaulted to 3 hours however the system allows settings from 0 - 3 hours. For UL certified installations this number must be set from 1 to 3 hours. • The system allows the use of non-latching spot type smoke de...
Before testing the problem zone, we need to do a quick check to find out ifend-of-line resistors(EOLR's) were installed on each zone. EOLR's are used on some panels forzone supervision, which I won't get into here. Suffice to say that if EOLR's are used, they can be located...
2 x independent balanced analogue in, line-level mono, 22 kΩ input impedance 6 x EVAC in, 1 x SILENCE in, 1 x RESET in monitored logic inputs, 4.7 kΩ + 10 kΩ EOL resistors 8 x GPI unmonitored logic inputs (pull-down, configurable active low/hi) Outputs EVAC out, FAULT out ...