ABB Endura AZ20 series

Endura AZ20 series probe
Combustion oxygen monitor 4 Connections
IM/AZ20P–EN Rev. G 17
4 Connections
4.1 Electrical Safety
Warning.
 The transmitter is not fitted with a switch therefore a
disconnecting 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 instrument within easy reach of the operator and
must be marked clearly as the disconnection device for
the transmitter – see IM/AZ20E–EN.
 The probe must be bonded to local earth via the
external earth connection – see Fig. 4.1.
 Electrical installation and earthing (grounding) must be
in accordance with relevant national and local
standards.
 Remove all power from supply, relay and any powered
control circuits and high common mode voltages before
accessing or making any connections.
 The Endura AZ20 cable carries the screened signal
wires and the separately screened 90 to 264 V AC
heater wires safely. Do not use alternative wires.
 The equipment conforms to Installation Category II of
IEC 61010.
 All connections to secondary circuits must have basic
insulation.
 After installation, there must be no access to live parts,
for example, terminals.
 Terminals for external circuits are for use only with
equipment with no accessible live parts.
 If the equipment is used in a manner not specified by
the Company, the protection provided by the
equipment may be impaired.
 All equipment connected to the transmitter's terminals
must comply with local safety standards (IEC 60950,
EN601010-1).
Fig. 4.1 External Earth Connection
Caution.

Make connections only as shown.
 Maintain Environmental Protection at all times.
 Ensure the seal and mating surfaces are clean to
maintain environmental rating.
 Ensure cable glands are tightened after wiring. Do not
overtighten the plastic cable glands to avoid destroying
their sealing properties. Initially, tighten finger-tight, then
a further
1
/2 to
3
/4 turn using a suitable spanner or
wrench.
 Fit blanking plugs where required.
 Inductive loads must be suppressed or clamped to limit
voltage swings.
 Operation of outputs is programmable.
External
Earth Connection