Electrical Connections - ABB Aztec AWT440 Commissioning Instructions

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Electrical connections

DANGER – Serious damage to health / risk to life
– The transmitter is not fitted with a switch – an
isolation device such as a switch or circuit breaker
conforming to local safety standards must be fitted
to the final installation. It must be fitted in close
proximity to the transmitter, within easy reach of the
operator and marked clearly as the isolation device
for the transmitter.
– Remove all power from supply, relay, any powered
control circuits and high common mode voltages
before accessing or making any connections. Use
cable appropriate for the load currents: 3-core cable
rated 3 A and 75 °C (167 °F) minimum, and voltage:
100 / 240 V that conform to either IEC 60227 or IEC
60245, or to the National Electrical Code (NEC) for
the US, or the Canadian Electrical Code for Canada.
The terminals accept cables AWG 26 to 16 (0.14 to
2
1.5 mm ).
– All connections to secondary circuits must have
insulation to required local safety standards. After
installation, there must be no access to live parts,
for example, terminals. Use screened cable for
signal inputs and relay connections. Route signal
leads and power cables separately, preferably in an
earthed (grounded) flexible metal conduit.
USA and Canada only
– The supplied cable glands are provided for the
connection of signal input and MODBUS, Profibus
and Ethernet communication wiring ONLY.
– The supplied cable glands and use of cable / flexible
cord for connection of the mains power source to
the mains input and relay contact output terminals is
not permitted in the USA or Canada.
– For connection to mains (the mains input and relay
contact outputs), use only suitably rated field wiring
insulated copper conductors rated min. 300 V, 16
AWG, 90C. Route wires through suitably rated
flexible conduits and fittings.
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WARNING – Bodily injury
– If the transmitter is used in a manner not specified
by the Company, the protection provided by the
equipment may be impaired.
– Ensure the correct fuses are fitted – see Fig. 2,
page 7 for fuse details.
– Replacement of the internal battery must be carried
out by an approved technician only.
– The transmitter conforms to Installation Category II
of IEC 61010.
– All equipment connected to the transmitter's
terminals must comply with local safety standards
(IEC 60950, EN61010-1).
– The Ethernet and bus interface connectors must
only be connected to SELV circuits.
CI/AWT440–EN Rev. A