AT-MZA
Multi Zone Alarm
LEAK DETECTION SOLUTIONS
Weights & Measures House, 20 Barttelot Road,
Horsham, West Sussex RH12 1DQ
+44 (0) 1403 216100
info@aquilar.co.uk
www.aquilar.co.uk
COMMON LEAK RELAY
X14 Bottom connection
FAULT RELAY:
Common to all zones X14 Top connection
All relays are SPDT and independent of
the next.The MZA’s FAULT relay will also
indicate power failure as the relay contacts
will de-energize to signal an alarm condition.
Therefore, loss of power as well as a cable
break would trip the relay and any equipment
connected.
x14
x13
x11
x8
x5
N/O
N/C
C
6
Note:
The relay plugs can accept wires 12 to
24 AWG. Cable should have a temperature
rating of 65°C.
Note:
Maximum load for relays is 3 amps,
250Vac/24Vdc.
F. CONNECTING THE ZONE EXPANSION CARDS
Important:
The MZA-EXP is an electronic unit. During installation, take the following
precautions to avoid damage to its electronic components:
• The MZA panel should not be powered
when installing the MZA-EXP card.
• Anti static precautions should be taken
before touching the boards inside.
• Handle with care, avoid mechanical
damage.
• Keep the electronics dry.
• If handling circuit boards, hold them by
their edges to avoid physical contact with
electronic components.
• Avoid exposure to static electricity.
•
Avoid contamination with metal filings,
liquids, or other foreign matter.
• A maximum of three MZA-EXP cards can be
added to a MZA panel.
• Each MZA-EXP provides two additional
zones of sensing.
• Remove the card from it’s static free
packaging.
•
Insert the first card on vertical connector
marked zones 3-4 and the following cards
on zones 5-6 and zones 7-8. The card will
only fit in one direction.
• Push the card securely to the base
connector.
• Once the card has been securely installed
the MZA panel can be powered.
INSTALL ZENER BARRIER, IF
APPLICABLE
When sensing cable will be located in Class
1, Division 1 locations, approval agencies
require that the sensing cable be protected
with a zener barrier between the sensing
cable and the MZA module. A zener barrier
may also be used to provide lightning
protection for the module when the
sensing cable may be exposed to electrical
discharges. Contact your distributor/agent to
select the proper zener barrier. One will be
required for each sensing zone.
When installing a zener barrier, wire
it in accordance with the instructions
provided with the kit.
