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EnCal 3000 Quad– Hardware Manual
22/06/2017
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2.12 Cable Glands
Three cable glands can be connected to the enclosure base of the Master unit: up to two M25 and up to
three M20 cable glands. For the standard configuration see chapter 5
“Hardware installation”.
Most installations will use one for data communication cable (TCP-IP and/or Serial ModBus) and another for
Power Supply (24 VDC). Additionally also signal cables (such as alarm contacts, carrier gas control, etc)
might be used as long as they are combined in the same cable.
fig. 2-17 Location of Cable Glands at the right of the Enclosure Base
Cable glands with a sealing system are typically required. 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 glands and blind
covers of unused openings must be installed correctly and non-flammable.
2.13 External Switch
To comply with Electrical Safety Standards IEC 60947-1 and IEC 60947-3, an external switch has to be
located close to the analyser, enabling an operator to close down the unit in case of emergency. It has to be
marked with "Disconnecting Device". Practical implementation of this requirement will differ from site to site.
In any case the external switch installation has to comply with all national, local, and company codes
applicable to the location.