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4.2 Electrical connections
4.2.1 24 V DC supply
(compressor unit to Aztec AWT440 transmitter)
WARNING – Bodily injury
— Isolate the compressed air unit and Aztec AWT440
transmitter from the mains power supply before
making electrical connections.
— Ensure all cable runs are safe and do not present
a trip hazard when routing / securing.
Referring to Fig. 2.1, page 5:
1. Release the 2 door locks
unit door.
Referring to Fig. 4.4:
2. Loosen the M12 cable gland entry on the base of the
compressed air unit and pass one end of the sheathed
twin-core connection cable through. Pass the other end of
the cable through the required cable gland entry on the
transmitter refer to the transmitter Operating instruction
(OI/AWT440-EN) for gland entry options.
3. Make connections between the compressed air unit and
transmitter.
4. Tighten low voltage cable glands on compressed air unit
and transmitter.
5. Proceed to Section 4.2.2 to make the mains voltage supply
connection to the compressed air unit.
MAINS INPUT 115V/230V
M12 cable gland
entry (24 V DC cable)
To DI01 to DI06 terminal on
transmitter (assign terminal ID (1
to 6) at Input/Output / Digital I/O
/ Digital I/O 1 (to 6) parameter –
see OI/AWT440-EN
Aztec AWT440
transmitter
To positive (+) connection on
compressed air unit 24 V DC relay
Fig. 4.4 24 V DC connections –
compressed air unit to Aztec AWT440 transmitter
10
OI/ADS430/EZCLN–EN Rev. B | Aztec ADS430 EZCLEAN | Compressed air supply unit
Q
and open the compressed air
Compressed air unit
24 V DC relay
–
+
To INT + 24V terminal
on Aztec AWT440 transmitter
SK1
RS485 SMAR T SENSO R
INTERFACE MODULE
ANALOGUE OUTPUT BOARD
CM40/0215 ISS. 1
CM40/0235
SK4
SK5
SK5
RELAY
RELAY
OUT 3 OUT 4
5
6
SK2
I/O MODULE 3
I/O MODULE 2
I/O MODULE 3
1
2
3
4
5
+
–
+
–
OUT 1 OUT 2
COMM S
RELAY 1
RELAY 2
RELAY 3
RELAY 4
To negative (–) connection
on compressed air unit
24 V DC relay
4.2.2 Mains voltage supply (230 or 115 V AC)
WARNING – Bodily injury
— Isolate the compressed air unit and Aztec AWT440
transmitter from the mains power supply before
making electrical connections.
— Ensure the voltage supply matches the supply
voltage specified on the instrument label
within the enclosure before making connections –
see Fig. 2.1, page 5.
— Ensure all cable runs are safe and do not present
a trip hazard when routing / securing.
Referring to Fig. 4.5:
1. Loosen the M20 cable gland entry on the base of the
compressed air unit and pass the free end of the 3-core
mains supply cable through.
2. Make mains power supply connections to the compressed
air unit Neutral / Earth / Live terminals.
3. Tighten the M20 mains supply voltage cable gland.
4. Close and lock the compressed air unit door – refer to Fig.
2.1, page 5.
5. Proceed to Section 5, page 11 to configure the cleaning
schedule.
2 A anti-surge
fuse (beneath
cover)
Earth
Neutral
Fig. 4.5 Mains supply voltage 230 or 115 V AC connections
N
L
MAINS INPUT 115V/230V
M20 cable
gland entry
(230 / 115 V AC
mains supply cable)
N E L
Live
P
fitted
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