ABB Endura AZ20 series, User Manual

Page: 20 / 40

Endura AZ20 series probe
Combustion oxygen monitor 4 Connections
18 IM/AZ20P–EN Rev. G
4.2 Cable Preparation
4.2.1 Endura AZ20 Probe to Remote Endura AZ20
Transmitter Referring to Fig. 4.2:
1. Expose the signal and screen wires by cutting the outer
insulation sheath and screen foil and inner (heater)
insulation sheath and screen foil back to the following
lengths:
– Probe connection wires:
braided copper shield
A
– 25 to 30 mm
(1 to 1.2 in.)
connection wires
B
– 100 mm (4 in.)
– Transmitter connection wires (incl. screens)
C
– 100 mm (4 in.)
2. At both ends of the cable, twist the 2 screen wires
D
together to form one twisted pair at each end and fit an
earth sleeve (not supplied) over each twisted pair.
Leave 10 mm (0.4 in.) of each twisted pair exposed for
connection at the terminal plugs.
3. Prepare the signal and heater wire ends
E
for
connection at the terminal plug(s) by cutting sleeves back
to expose 10 mm (0.4 in.) of bare wire.
4. Important – on non-AutoCal probes, do not cut the
AutoCal wires back to the outer insulation sheath. Instead,
bundle them together at both the transmitter and probe
end to allow a future AutoCal upgrade if required to be
performed using the existing cable.
AutoCal wires comprise:
– White / Yellow – PS2
–
White / Black
– PS Common
– White / Orange – PS1
– White / Green – SV1
– White / Red – SV Common
– White / Blue – SV2
5. Proceed to Section 4.3, page 20 to make probe cable
connections at the remote probe.
Warning. The Endura AZ20 cable carries the screened
signal wires and the separately screened 90 to 264 V AC
heater wires safely.

If alternative cables are used, the cable sizes and
insulation specifications must be adhered to and the
90 to 264 V AC heater wires must be screened
separately to prevent interference to the signal cables.

If the signal cables are not contained in a suitable
metallic conduit, they must also be screened
separately to prevent external interference.