IM-P402-44
AB Issue 15
12
Refer to the relevant controller documentation/wiring diagram for full information, including
screen connection details.
Cabling should be installed in accordance with BS 6739 - Instrumentation in Process Control
Systems: Installation design and practice or local equivalent. For US and Canadian installations
the probe must be wired in accordance with the National and Local Electrical code (NEC) or
the Canadian Electrical code (CEC). Wiring should be carried out using 4 core, 1 mm
²
(18-16
AWG), high temperature screened cable, with a maximum length of 50 metres (165 ft). Pirelli
FP 200 or Delta Crompton Firetuf OHLS are two suitable types for the standard LP30. For
the UL/FM version, Class 1 screened cable with a suitable temperature rating (75
°
C/167
°
F
minimum) must be used to connect the terminal box to the controller.
Ensure that sufficient cable length is provided to allow removal of the cable socket and to
ensure that no strain is placed on the unit.
To unplug the cable socket, remove the central screw.
Note:
To provide environmental protection the probe is supplied with a gasket between
the cable socket and the probe connector. To maintain environmental integrity, ensure the
gasket is always present when reconnecting cable socket and that all contact surfaces
are clean and undamaged.
To gain access to the connector block within the cable socket, remove the central screw and
withdraw the hinged cover.
The connector block on the standard LP30 maybe rotated in 90° steps to facilitate wiring:
-
Remove the retaining screw and withdraw socket.
-
Remove connector block and reposition as required.
Note: It is not possible to rotate the connector block on the UL/FM version.
4. Wiring
UL / FM version
The socket is supplied with four 18 AWG, 300 mm (12") long colour coded flying leads. These are
to be cut to length and connected to a suitable metal terminal box. A length of flexible metal conduit
is required between the probe and the terminal box to provide environmental protection and easy
electrical connection. The cable socket is provided with a
½
" NPT conduit adaptor for this purpose.
WARNING:
The flying leads supplied with the probe are rated to 221°F (105°C). This temperature
rating must not be exceeded.
The flexible conduit and terminal box are not to incorporate any other control wiring as
this may damage or reduce the performance of the product.
It is not possible to rotate the cable socket in 90° steps, as with the non-listed LP30.
To do so may damage the internal wiring.
Ensure that any condensation which might build up in the conduit network is prevented
from accumulating in the probe cable connector and terminal box.
1
Red
probe tip
2
Black
comparator tip
3
Black
Comparator tip
3
2
1
Fig. 7 View of connector block removed from cable connector
Yellow
Earth
Screen
Summary of Contents for LP30
Page 2: ...IM P402 44 AB Issue 15 2 ...
