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INM MTL SUM5 Rev 7
DRAFT - 09 June 2021 DRAFT - 09 June 2021
17.6 CS Relays (Common Service Relays)
Each channel within the annunciator can be assigned to a single or multiple groups. The group can
be software linked to any of the common relays to provide contact outputs for use with 3rd Party
devices.
The elds listed under the “CS Relays” tab allow the user to congure the common system relays
to follow groups as required.
17.7 Horn A - HNA
The default setting for this relay is Horn A / HNA, the relay is normally de-enegised and provides a
N/O contact for use with external audibles / 3rd party devices. The relay will activate on alarm and
will return to normal after Mute or Acknowledge have been pressed. The relay must be assigned to
a group and the group type needs to be set as “Audible” for the relay to operate correctly.
• The coil state can be set to Normally Energised or Normally De-Energised, by selecting the
required feature using the Drop-down menu shown next to the coil status eld.
17.8 Horn B - HNB
The default setting for this relay is Horn B / HNB, the relay is normally de-energised and provides a
N/O contact for use with external audibles / 3rd party devices. The relay will activate on alarm and
will return to normal after Mute or Acknowledge have been pressed. The relay must be assigned to
a group and the group type needs to be set as “Audible” for the relay to operate correctly.
• The coil state can be set to Normally Energised or Normally De-Energised, by selecting the
required feature using the Drop-down menu shown next to the coil status eld.