Rockwell Automation 1794-OW8_OW8K_OW8XT Flex I/O 8 Output Relay Module - Manual (Page 2)

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Publication 1794-IN019H-EN-P - January 2011
North American Hazardous Location Approval
The 1794-OW8, 1794-OW8K, 1794-OW8XT modules are Hazardous Location
approved.
Installing Your Relay Output Module
The module mounts on a 1794 terminal base.
1. Rotate the keyswitch (3) on the terminal base (4) clockwise to position 9 as
required for this type of module.
2. Make certain the flexbus connector (1) is pushed all the way to the left to
connect with the neighboring terminal base and adapter. You cannot
install the module unless the connector is fully extended.
3. Make sure the pins on the bottom of the module are straight so they will
align properly with the connector in the terminal base.
4. Position the module (7) with its alignment bar (6) aligned with the groove
(5) on the terminal base.
5. Press firmly and evenly to seat the module in the terminal base unit. The
module is seated when the latching mechanism (4) is locked into the
module.
Simplified Schematic of the Relay Module
Load power can be obtained from a variety of sources, and can range from
+5V…240V AC. Make certain that only 24V DC is applied to the module power
terminals on the module terminal base unit.
If you are using 220/240V AC power, you must use the 1794-TBN or 1794-TBNF
terminal base unit. Maximum voltage allowed is shown below.
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
Rockwell Automation.
•
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.
• This equipment must be used only with ATEX certified Rockwell
Automation terminal bases.
• 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.
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.
ATTENTION
During mounting of all devices, be sure that all debris (for example, metal
chips and wire strands) is kept from falling into the module. Debris that
falls into the module could cause damage on power up.
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2
3
5
6
7
4
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ATTENTION
Allow 25.4 mm (1 in.) of space between adjacent equipment for adequate
ventilation.
WARNING
If you remove or insert the module while the backplane power is on, an
electrical arc can occur. This could cause an explosion in hazardous
location installations. Be sure that power is removed or the area is
nonhazardous before proceeding.
WARNING
Exposure to some chemicals may degrade the sealing properties of
materials used in the following devices:
Relay K1 through K8, Epoxy.
It is recommended that the User periodically inspect these devices for any
degradation of properties and replace the module if degradation is found.
Relay Load Contact Wiring
DC
Return
+24V
DC
24V
DC
48V
DC
120V
AC
240V
AC
125V
DC
24V
DC
120V
AC
240V
AC
Representative Examples of Various Relay Loads
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