FLEX Ex Spring Clamp Terminal Base
3
1797-5.2 - September 1999
Ex Directive
This product is tested to meet the Council Directive 94/9/EC (ATEX 100a)
Equipment and Protective Systems Intended for Use in Potentially
Explosive Atmospheres by applying the following standards:
•
EN50014:1992, Electrical Apparatus for Potentially Explosive
Atmospheres
•
EN50020:1994, Electrical Apparatus for Potentially Explosive
Atmospheres - Intrinsic Safety “i”
Inputs/Outputs
Do not apply any non-instrinsically safe signals to this terminal base.
When using as an intrinsically safe electrical apparatus according to
EN50020, the European directives and regulations must be followed.
The terminals in this terminal base unit may be electrically connected to
each other by the insertion of FLEX Ex I/O modules. See the module
installation instructions to determine this.
Description
The 1797-TB3S terminal base has 36 wiring connections to/from a plug-in
module. The use of each terminal depends on the module mounted in this
base.
The 1797-TB3S terminal base also has connections for cold junction
compensation and terminals designated for shield termination to chassis
ground.
The terminal base is equipped with a factory-installed tab cover for the
backplane bus connection. The tab cover may be removed only when the
terminal base unit is connected to other terminal base units.
Important: When interconnecting several lines, you must consider the
total accumulated power and check for intrinsic safety
requirements.
Allen-Bradley