Edwards EST 3-IDC 8/4 Traditional Zone I/O Module

The Edwards EST 3-IDC8/4 Traditional Zone I/O Module provides eight Class B traditional direct connect initiating device circuits (IDCs) for compatible two-wire smoke detectors and dry contact initiating devices. Four of the initiating device circuits can be converted to Class B notification appliance circuits (NACs). The four IDC/NAC circuits must be configured as either an NAC or an IDC, never both. Each IDC can be set for latching or nonlatching operation and smoke verified or unverified operation using the software definition utility. Each pair of NAC circuits may be configured to provide 24 VDC from the internal chassis rail, 24 VDC from an external power supply, or signals from an external source for notification, audio, and telephone applications. NAC input terminals are provided to supply the external signal source.