Specifications

27
Reference Manual
00809-0100-2460, Rev AA
Section 3: Installation
November 2014
Installation
3.5 Electrical Installation
See Electrical Installation Drawing D7000001-928 for further information.
3.5.1 Cable Entries
The Rosemount 2460 housing has nine M20 x 1.5 and two M25 x 1.5 entries. The connections
must be made in accordance with local or plant electrical codes.
Make sure that unused cable entries are properly sealed to prevent moisture or other
contamination from entering the terminal board compartment of the electronics housing.
Note!
Use the enclosed metal plugs to seal unused cable entries in order to achieve required level of
ingress protection. The plastic plugs mounted at delivery are not sufficient as seal!
Note!
It is recommended that a sealant of type PTFE is used to prevent water ingress and to enable
future removal of the plug/gland.
3.5.2 Power Supply
The Rosemount 2460 System Hub accepts supply voltage 100 - 250 Vac (50/60 Hz) and 24 - 48
Vdc.
3.5.3 Cable Selection for Power Supply
Appropriate cross sectional area of wires must be used in order to prevent a high voltage drop to
the connected device. Recommended cable size is 0.75 mm
2
to 2.0 mm
2
(18 AWG to 14 AWG)
in order to minimize the voltage drop.
3.5.4 Grounding
The housing should always be grounded in accordance with national and local electrical codes.
Failure to do so may impair the protection provided by the equipment. The most effective
grounding method is direct connection to earth ground with minimal impedance. There are
grounding screw connections inside the terminal compartments which are identified by ground
symbols: / . There is also a grounding screw on the housing.
The System Hub ground bar (see Figure 2-5 on page 11) shall only be used for connecting signal
related ground wires, eg shield ground connections from the field bus harness. The protective
earth ground connection shall be connected to the System Hub via the dedicated power board
IEC plug and the external grounding screw on the housing.
Connect shield to ground at one end only, otherwise a ground loop may occur.
Note!
Grounding the device via threaded conduit connection may not provide sufficient ground.