Teledyne 1220 - Multipoint flammable gas and vapor detection system - Manual (Page 24)

3 Installation Model 1220
3-6
Teledyne Analytical Instruments
Three alarms (CAUTION, HIGH, and FAIL) may be configured for
either fail-safe (default) or non-fail-safe operation per the following table:
The external audible alarm may be configured to operate in either the
fail-safe (default) mode or the non-fail-safe mode. It may also be configured
to provide either a contact closure (default) or the incoming line voltage to
the external connections. Additionally, the contact closure can be normally
opened or normally closed (when the relay is de-energized). The following
tables summarize the jumper settings for the external audible alarm configu-
rations: