ABB Advant Controller 450 User Manual

Advant
®
Controller 450 User’s Guide
Chapter 2 Installation
2-20 3BSE 002 415R701 Rev A
By different reasons other field cables may be shielded too. For example following a
company/plant standard. There is no requirement from the controller viewpoint. These field
cables are denoted category B.
Unshielded process I/O cables can be mixed with shielded process I/O cables.
Common to all cabinet designs is the horizontal mounting bar at the left hand side of the cabinet
inside, close to the bottom of the cabinet. They can be used to mechanically anchoring all types
of field cables, shielded and unshielded, when entering the cabinet.
CE-marked Design
Shields of category A cables which are to be directly grounded in the cabinet must be grounded
to the cabinet chassis, cable ducts or connection units, according to Figure 2-8. Use a short lead
(<50 mm) and thread-cutting screws.
If there is a requirement of local grounding of a cable shield for, for example, a thermocouple
application, cable with double shield should be used. The inner shield is grounded locally at the
transducer while the outer shield is grounded according to Figure 2-8.
Shielded cables of the category A which are grounded locally at the transducer are alternatively
to be connected via a capacitive decoupling device, located in the bottom of the cabinet.
That is similar solution to that used for certain communication cables. See Section 2.2.5.5,
Grounding of Communication Cable Shields.
Shields of category B cables can be handled in the same way as category A cables.
Figure 2-8. Handling of Process I/O Cable Shields in a CE-marked Cabinet
≤ 5 mm (2”)
Connection unit
X
X
Side view X-X
Example of application with S100 I/O
Connection of shield
in cable duct with
tapping screw ST3.5x9.5
Process
I/O Cable

ABB Advant Controller 450 Specifications

General

Brand	ABB
Model	Advant Controller 450
Category	Controller
Language	English