8
Fig 5 Dimensions and terminal connections
6.3 Intrinsically safe sensor inputs
When the transmitter is connected directly to a
sensor in Zone 0 or 1, the intrinsically safe input
wiring connected to terminals 1, 2, 3 & 4 must be
segregated from the non-intrinsically safe 4/20mA
output wiring connected to terminals 5 & 6.
An insulating partition separates the intrinsically safe
and non-intrinsically safe terminals within the
transmitter terminal enclosure. Conductors of
intrinsically safe circuits and non-intrinsically safe
circuits should not be contained in the same cable
and should enter the terminal compartment via
separate glands or conduit entries. See EN 60079-
14 section 12 for detailed cable requirements.
6.4 EMC
The BA474ND complies with the requirements of the
European EMC Directive 2004/108/EC. For specified
immunity, all wiring should be in screened twisted
pairs with the screens earthed at one point in the safe
area.