Alstom iSTAT M355, Руководство пользователя

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M3x5/EN M/B User Manual
Page 58
iSTAT M3x5
FIGURE 10-11: ANALOGUE OUTPUT SETTINGS
If the Analogue output signal is modified from the full linear range, the accuracy of the output
may be reduced due to the reduction in the overall output range.
Note : If the ‘Used’ voltage and current ranges are changed after the analogue settings have
been defined, then the analogue settings will be modified automatically, see section 10.5.3.
It may be necessary to subsequently modify the settings for the analogue outputs.
10.10.2 Alarm/Digital Output Module (KD)
If a Digital output is defined as an Alarm output, its activity (trigger) is connected to the Alarm
groups. Multiple alarm groups can be attached to it and different signal shapes can be
defined.
An alarm module can also function as a pulse output with limited pulse length (min 10ms) or
a general purpose digital output. The settings for the pulse option are defined in the same
way as for the pulse module. A parallel RC filter with a time constant of at least 150 µs (R*C
≥ 250 µs) should be fitted when connected to a sensitive pulse counter, to attenuate the
relay transient signals.
10.10.2.1 Output signal
The alarm/digital output can be configured for a number of different signal shapes:

Normal − A relay is closed as long as condition for the alarm is fulfilled.

Normal inverse − A relay is open as long as condition for the alarm is fulfilled. After
that relay goes to closed state

Latched − A relay is closed when condition for the alarm is fulfilled, and remains
closed until it is manually reset.

Latched inverse − A relay is open when condition for the alarm is fulfilled, and remains
open until it is manually reset.

Pulsed − an impulse of the user set length is activated always when condition for the
alarm is fulfilled.

Pulsed inversed – Normally relay is activated. An impulse of the user set length
deactivates it always when condition for the alarm is fulfilled.