EnCal 3000 Hardware Manual 73022344 o 57
Installation directive EN 60079-14 recommends for Ex-d devices with an internal
volume > 2 dm3 the so-called “Barrier Glands”, incorporating compound filled seals
around the individual cores or other equivalent sealing arrangements. The cable entry
devices and blanking elements of unused apertures shall be of a certified flameproof
type, suitable for the conditions of use and correctly installed. For connection of an
external earthling or bonding conductor a cable lug shall be used. The conductor shall
be mounted so that it is secured against loosening and twisting and that the contact
pressure is permanently maintained.
The prepared cables must be fed through the cable glands in the device base. All the
electrical interfaces, are located on a single terminal board and electrically isolated. The
screened cables must be connected in compliance with local conditions and
regulations. Also take note of the specifications of the cable gland manufacturer.
Cables, wires, cable glands, adapters and blind plugs are standard products
not manufactured by Honeywell which are required for operating the device.
The basic equipment can be extended or adapted by using other parts or
buying additional ones. We recommend that the data cables are separated
from the power supply cable.
Standard industrial 2-wire cable, wire cross-sections AWG 12-13 (2.5 - 4 mm²) can be
used for the power supply. (The use of an external junction box is responsibility of the
customer / installer) Armoured cable required for outdoor installation – OD between 12
and 25 mm Power rating 24 VDC / 120 W max nominal (ambient T > 0 °C or >32 °F). The
cable cross-section must be chosen sufficiently large.
A maximum rated operating current of 5 A should be considered for the power supply.
(Remember to take the cable voltage drop into account.) Ensure that the power supply
is capable of tripping the external circuit breakers or the internal 5 A fuse in the event of
a short-circuit.
Wire cross-sections of 0.14 mm² to 1.5 mm² are suitable for signals. When making your
selection, also note that the wire cross-section must satisfy the electrical and
mechanical requirements. For example, signal cables generally require wire cross-
sections of over 0.25 mm². In general, the connection cables can be routed to two
separate locations without additional Ex-rated junction boxes.
Various data communication cable are suitable for the connection between the enCal
3000 and other devices. They should be selected on the basis of the requirements at the
place of use. Honeywell generally recommends a signal cable with a conductor-to-
conductor capacitance of less than 120 pF/m and an inductance of less than
0.7 H/m.
The number of cores varies depending on the application, whereby the cores should be
twisted in pairs and screened jointly. The maximum cable length depends on the type of
signal and must not be exceeded. A cable type of category 5 (Cat 5) is recommended for
data communication links via Ethernet.
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