Alstom iSTAT M355, Manual, Page: 67 / 154

User Manual M3x5/EN M/B
iSTAT M3x5
Page 65
10.13.3.2 Value
For chosen monitoring parameter an actual value or MD value should be set.
10.13.3.3 Condition
It is a combination of a logical operator “Higher than” or “Lower than” and a limit value of the
condition. For digital input it is possible to set condition as “Is high” or “Is low”.
10.13.3.4 Action
This section consists of checkboxes that apply different functions to individual alarms.
Switch on Relay checkbox can be selected if user wants this alarm to trigger output(s) that
are connected to its group of alarms (pulse or relay output module). This action only applies
to I/O modules 1 and 2. To relay outputs of I/O module A or B only a single alarm can be
attached. In this case Switch on Relay setting has no influence.
Switch on sound signal checkbox activates the built in beeper if this alarm is active.
Alarm enabled checkbox, activates alarm setting.
10.13.3.5 Types of alarms
Visual alarm: When alarm is switched on, a red LED on the device front side blinks.
Audible alarm: When alarm is switched on, an audible alarm is given by the device (a beep).
It can be switched off by pressing any key on the front plate
Alarm output (pulse) – setting made for I/O module 1 and 2: According to the alarm signal
shape the output relay will behave as shown below.
FIGURE 10-14: ALARM OUTPUTS