Normal Mode; Latch Mode - GE Hydran 201 i Instruction Manual

Chapter 10 • Alarms
• Force OFF: See Section 10.2.3.3 on page 10-7.
• Force ON: See Section 10.2.3.4 on page 10-7.
The H201Ti's three relays are independent. A relay can therefore be set to any operation
mode regardless of the mode of the two other relays.
10.2.3.1

Normal Mode

In this mode, the relay status changes if an alarm condition is detected during a period of
time exceeding the corresponding alarm delay; the relay returns to its former status when
the alarm condition disappears during a period of time exceeding the same alarm delay. The
Normal mode is the default setting.
In the Normal and Latch modes:
• The High and High-High alarm relays are energized when an alarm condition is detected.
• The fail alarm relay, however, is de-energized when an alarm condition is detected, to
permit to detect a power failure (the relay's power being immediately off). This feature
of the Hydran 201i System strengthens the security of the alarm system. The fail alarm
relay is thus energized (NO contacts closed and NC contacts open) if no alarm condition
is detected.
10.2.3.2

Latch Mode

In this mode, the relay status changes if an alarm condition is detected during a period of
time exceeding the corresponding alarm delay; the relay returns to its former status when
the alarm condition disappears during a period of time exceeding the same alarm delay and
when the alarm is acknowledged by the user (using the Hydran 201Ti's keypad or the
Hydran Host software).
Note: Only pushing the Hydran 201Ci-1's push-buttons is not enough to acknowledge an
alarm.
Read also the points in the Normal mode (Section 10.2.3.1 on page 10-6).
10-6 Rev. 6, March 2011 Part 17997