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May 2019
3.5
Terminal compartment wiring (non-exe)
Failure to follow these installation guidelines could result in death or serious injury. Ensure that only
qualified personnel perform the installation.
Electrical shock could cause death or serious injury. Use extreme caution when making contact with
the leads and terminals.
Do not open the GDU-Incus enclosure when in a classified area or when an explosive atmosphere may
be present unless the power to the GDU-Incus has been removed.
The GDU-Incus terminal cover is certified to flameproof standards and should not be opened while
energized.
The detector housing should be connected to local ground via the external earth point as shown in
Figure
Termination at detector should be suitable for M6 (0.25-in.) fastener. Ensure earth wire is attached
using the supplied spring washer.
The standard GDU-Incus is temperature rated between -40 °F and +185 °F (-40 °C and +85°C), and the
heated variant is temperature rated between -67 °F and +185 °F (-55 °C and +85 °C). Ensure that all
cable is rated to the appropriate temperature of installation.
3.5.1
General
Wiring codes and regulations may vary. Wiring must comply with all applicable regulations relating to
the installation of electrical equipment in a hazardous area and is the responsibility of the installer. If in
doubt, consult a qualified official before wiring the system.
In applications where the wiring is installed in conduit, the conduit must not be used for wiring to other
equipment.
For full EMC compliance ensure incoming cables are threaded through the ferrite beads (provided with
unit), see
To gain access to the terminal compartment, undo the six terminal cover fixing screws and raise the
terminal cover vertically until clear of the main enclosure. The terminal cover is held in place by means
of a stainless steel wire. The terminal cover can be lowered to the side of the detector during
installation but care should be taken to ensure the flamepath is not damaged. Refer to
flamepath details. Tighten the six terminal cover fixing screws to a torque of 9 Nm.
14
3-16. The ground wire should be minimum of 4 mm² (8 AWG) and as short as possible.
Figure
3-11.
Reference Manual
00809-0100-3003, Rev AA
Figure 3-12
for
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