Output Parameters Of Ezlink Sensor; Specific Conditions Of Safe Use; Electrical Installation In Hazardous Areas; Iecex/Atex Gland Entries - ABB AWT420 Manual

AW T4 2 0 | U N I V E R S A L 4 - W I R E , D U A L- I N P U T T R A N S M I T T E R | I N F/A N A I N S T/0 1 2 - E N R E V. A

Output parameters of EZLink sensor

Maximum open-circuit voltage
Maximum short-circuit current
Maximum output power
Maximum inductance
Maximum capacitance
The following table is the permitted combinations of Lo and Co:
Lo (mH) 0.492 0.192
Co (uF) 1.56 6.56
Table 1 Permitted combinations of Lo and Co

Specific conditions of safe use

1 The enclosure contains aluminum and is considered to
present a potential risk of ignition by impact or friction. Care
shall be taken into account during installation and use to
prevent impact or friction.
2 For areas subject to explosive gas and/or dust atmospheres
the painted surface of the equipment may store electrostatic
charge and become a source of ignition in applications with
a low relative humidity < ~30% relative humidity where the
painted surface is relatively free of surface contamination
such as dirt, dust, or oil. Guidance on protection against the
risk of ignition due to electrostatic discharge can be found in
IEC TS 60079-32-1. Cleaning of the painted surface shall only
be done in accordance with the manufacturer's instructions
(see: Risk of electrostatic discharge).
3 The equipment shall not be used where UV light or radiation
may impinge on the enclosure or the window of the
enclosure.
4 The equipment shall only be used in an area of at least
Pollution Degree 2, as defined in IEC 60664 -1.
5 Transient protection shall be provided that is set at a level
not exceeding 140% of the peak rated voltage at the supply
and relay terminals of the equipment.
6 The equipment shall only be used in an area of at least
overvoltage category II, as defined in IEC 60664 -1.
7 The EZLink wiring is intrinsically safe and must be installed
and separated from non-IS wiring in accordance with IEC/EN
60079-14.
8 Relay contacts must be limited to 3 A.
(the non-hazardous version is 5 A).
Uo = 3.4 V
Io = 84 mA
Po = 283 mW
Lo = See Table below
Co = See Table below
0.092 0.042 0.012
11.56 19.56 37.56

Electrical installation in hazardous areas

IECEx/ATEX gland entries

For hazardous area installations, suitable ATEX or IECEx cable
glands and blanking elements with a minimum IP66 rating must
be used to seal the entry holes.

cULus installation

The use of Conduit for the non-I.S. external circuits, or
installation should be in accordance with Section 501.10(b) of
the NEC (NFPA 70).
Cable gland specification for hazardous area (Exe) applications
0.002
• M20 entries
68.56
• 5 to 9 mm (0.2 to 0.35 in)
• M16 entries
• 5 to 10 mm (0.20 to 0.39 in)
• 1/2 in NPT: 6 to 12 mm (0.24 to 0.47 in)
• Ethernet: 4.7 to 6.35 mm (0.187 to 0.25 in)

Part numbers for hazardous area (Exe) glands

Part number
3KXA877420L0116 M20 (qty. 5),
M16 (qty. 2)
3KXA877420L0117 1/2 in NPT (qty. 5),
M16 (qty. 2)
3KXA877420L0118 M20 (qty. 4),
M16 (qty. 2)
Ethernet (qty. 1)
3KXA877420L0119 1/2 in NPT (qty. 4),
M16 (qty. 2)
Ethernet (qty. 1)
3KXA877420L0120 Ethernet gland (qty. 1)
9
M20 | /₂ in
Ethernet
M16