ANALOX Ax 50, Руководство пользователя

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Analox 50 – Carbon Dioxide Analyser – User Manual
Document Ref: A50-811-19 – September 2014
Page 15
6) Restore power to the Ax 50
TM
. Press the switch on the Remote
Alarm Repeater once, and ensure that the four indicators and the
LED strobe flash. Note that in the presence of a genuine alarm,
this test feature is disabled.
4.3. Alarm Relay Output Models
You may have ordered your Ax 50
TM with relays (only 1 relay available if
O2 sensor specified). Relays are available in 2 different formats as
follows:
Internal relays
The relays are fitted internal to the main unit with a pre-wired 1m 6-core
cable supplied connected to relay contacts. With all power isolated,
make wiring connections to the Relay cable.
The relay contacts are ‘Volt-Free’ single pole Changeover and are rated
50VAC/DC, 1 Amps (max).
External relays
A pre-wired junction box is supplied with the Ax 50
TM
main sensor unit.
There is no need to open the main sensor unit. With all power isolated,
make wiring connections to the Relay Terminal Box.
The relay contacts are ‘Volt-Free’ single pole Changeover and are rated
240VAC/28VDC, 2 Amps (max).
For either internal or external the relays are normally non-latching which
means the relays will only activate when an alarm is raised and
deactivate when the alarm cancels.
Latched versions are available; if relays are latched they will only cancel
once the alarm state has cleared, and the mode switch on the Ax 50
TM or
Remote Alarm Repeater is pressed.
The relays are normally supplied ‘Fail Safe’ i.e. normally energised, and
will de-energise when in alarm state. The relay will also be in its alarm
state during the forty second warm up period.