2
FLEX I/O Terminal Base Units
Publication 1794-IN092E-EN-P - November 2009
North American Hazardous Location Approval
The following terminal bases are Hazardous Location approved: 1794-TBN,
-TBNK, -TB2, -TB3, -TB3K, -TB3S, - TB3SK, -TB3G, TB3GK, -TB3GS,
-TB3GSK, -TB3T, -TB3TK, -TB3TS, -TB3TSK, -TB32S, -TB32.
European Hazardous Location Approval
The following adapters are European Zone 2 approved: 1794-TBN, -TBNK, -TB2,
-TB3, -TB3K, -TB3S, - TB3SK, -TB3G, TB3GK, -TB3GS, -TB3GSK, -TB3T,
-TB3TK, -TB3TS, -TB3TSK.
FLEX I/O Cage-clamp Terminal Base Units
FLEX I/O Spring-clamp Terminal Base Units
FLEX I/O Terminal Base Units
FLEX I/O Fused Terminal Base Units
FLEX I/O Knifeswitch Terminal Base Unit
The following information applies when operating
this equipment in hazardous locations:
Informations sur l’utilisation de cet équipement en
environnements dangereux :
Products marked “CL I, DIV 2, GP A, B, C, D” are suitable for
use in Class I Division 2 Groups A, B, C, D, Hazardous
Locations and nonhazardous locations only. Each product is
supplied with markings on the rating nameplate indicating
the hazardous location temperature code. When combining
products within a system, the most adverse temperature
code (lowest “T” number) may be used to help determine the
overall temperature code of the system. Combinations of
equipment in your system are subject to investigation by the
local Authority Having Jurisdiction at the time of
installation.
Les produits marqués "CL I, DIV 2, GP A, B, C, D" ne conviennent
qu’à une utilisation en environnements de Classe I Division 2
Groupes A, B, C, D dangereux et non dangereux. Chaque produit
est livré avec des marquages sur sa plaque d’identification qui
indiquent le code de température pour les environnements
dangereux. Lorsque plusieurs produits sont combinés dans un
système, le code de température le plus défavorable (code de
température le plus faible) peut être utilisé pour déterminer le
code de température global du système. Les combinaisons
d’équipements dans le système sont sujettes à inspection par les
autorités locales qualifiées au moment de l’installation.
WARNING
EXPLOSION HAZARD
• Do not disconnect equipment
unless power has been removed
or the area is known to be
nonhazardous.
• Do not disconnect connections to
this equipment unless power has
been removed or the area is
known to be nonhazardous.
Secure any external connections
that mate to this equipment by
using screws, sliding latches,
threaded connectors, or other
means provided with this product.
• Substitution of components may
impair suitability for Class I,
Division 2.
• If this product contains batteries,
they must only be changed in an
area known to be nonhazardous.
AVERTISSEMENT
RISQUE D’EXPLOSION
• Couper le courant ou s’assurer que
l’environnement est classé non
dangereux avant de débrancher
l'équipement.
• Couper le courant ou s'assurer que
l’environnement est classé non
dangereux avant de débrancher les
connecteurs. Fixer tous les
connecteurs externes reliés à cet
équipement à l'aide de vis, loquets
coulissants, connecteurs filetés ou
autres moyens fournis avec ce
produit.
• La substitution de composants peut
rendre cet équipement inadapté à
une utilisation en environnement de
Classe I, Division 2.
• S’assurer que l’environnement est
classé non dangereux avant de
changer les piles.
European Zone 2 Certification (The following applies when the product bears the Ex
or EEx Marking)
This equipment is intended for use in potentially explosive atmospheres as defined by European
Union Directive 94/9/EC and has been found to comply with the Essential Health and Safety
Requirements relating to the design and construction of Category 3 equipment intended for use
in potentially explosive atmospheres, given in Annex II to this Directive.
Compliance with the Essential Health and Safety Requirements has been assured by compliance
with EN 60079-15 and EN 60079-0.
WARNING
Observe the following additional Zone 2 certification requirements.
•
This equipment is not resistant to sunlight or other sources of UV
radiation.
•
This equipment must be installed in an enclosure providing at least IP54
protection when applied in Zone 2 environments.
•
This equipment shall be used within its specified ratings defined by
Allen-Bradley.
•
Provision shall be made to prevent the rated voltage from being
exceeded by transient disturbances of more than 40% when applied in
Zone 2 environments.
•
Secure any external connections that mate to this equipment by using
screws, sliding latches, threaded connectors, or other means provided
with this product.
•
Do not disconnect equipment unless power has been removed or the
area is known to be nonhazardous.
Cat. No. 1794-TB2, -TB3, -TB3K, -TB32, -TB3G, -TB3GK, -TB3T, -TB3TK
1794-TB2
1794-TB3, -TB3K, -TB32,
1
2
3
4
5
6
7
8
9
10
11
-TB3G, -TB3GK, -TB3T, -TB3TK
Description
1
Female flexbus connector
2
Terminal base unit
3
Male flexbus connector
4
Keyswitch - set to the position required for the installed module
5
Mounting holes for panel mounting
6, 7,
8
Input/output terminal strips for connecting inputs/output wiring, commons, power
connections, customer power supplies, chassis grounds
9
Locking tab
10
Module locking latch
11
Cover plug for male flexbus connector
12
Cold-junction compensation terminals (1794-TB3T, -TB3TS, -TB3TK, -TB3TSK only)
13
Chassis ground terminations (1794-TB3T, -TB3TS, -TB3TK, -TB3TSK, -TB3G, -TB3GS,
-TB3GSK only)
14
Fuses - eight 5x20 mm (1794-TBNF, -TBNFK only)
15
Terminal strip cover (1794-TBN, -TBNK -TBNF, -TBNFK only)
16
Knife switches (1794-TBKD only)
Cat. No. 1794-TB3S, -TB3SK, -TB32S, -TB3GS, -TB3GSK, -TB3TS, -TB3TSK
1
2
3
4
5
6
7
8
9
10
11
12
13
12
Cat. No. 1794-TBN, -TBNK
1
2
3
4
5
6
8
15
10
11
9
Cat. No. 1794-TBNF, -TBNFK
6
1
14
15
11
14
2
3
4
10
9
5
6
Cat. No. 1794-TBKD
1
2
3
4
5
6, 7
6, 7
9
10
11
16
Cat. No 1794-TBKD
