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Alarm Pulses (Form-A)
The alarm output pulse is available as a Form-A output only. The alarm output pulse width is
fixed at 50 mS and there is no need for pulse scaling. An alarm pulse output is a one-time
occurrence, at the time any alarm becomes active. Subsequent alarm pulses will not occur until
all previous alarms have been cleared.
Output Pulse Specifications
1.
All outputs are isolated from ground and each other.
2. Outputs are rated for DC only, from 3.0 volts to 10.0 volts. Observe polarity.
3. The alarm output will sink up to 5 mA. Pulse duration is 50 mS minimum.
4. Form-A contact closures are between the A- and A+ terminals. The contact closures are
held for 50 mS. Note: Observe polarity.
Note: A- and A+ output channel is also used to power (on/off) an internal
or external
communication devices, i.e. cellular phones, modem, radio...etc.
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