InHand ISE Series, Руководство пользователя

Страница: 38 / 45

6.3 Introduction to Alarms
Two abnormal events are defined for ISE series products: loss of connection and
power supply failure. Either of these events will trigger an alarm.
The relay is provided with three contacts: open by default, closed by default and one
common terminal. The ports are shown in the following diagram.
When the switch is in a normal operational state, the two ports corresponding to
SAFE will become a closed circuit (switched on), and the two ports corresponding to
FAIL will become an open circuit (switched off) state. When the switch is not
powered on or undergoing an abnormal operation status, the two ports corresponding
to SAFE will be an open circuit (switched off), and the two ports corresponding to
FAIL will be a closed circuit (switched on). Alarm output: 2A@30VDC.
Note:

Port connectivity interruption alarms can be enabled or disabled via the
dip switch, but the main power source fault alarm is always enabled.

When an alarm event occurs, a triggered relay will maintain the alarm
state. The relay will return to a normal state only after all alarm events
have been corrected.