
IS1 I/O-Modules
Digital Input Module NAMUR for Installation in Zone 2 Type 9470/25
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S-BA-9470/25-16-12-0en-/11/20162495 / 9470602310www.stahl.de Operating Instructions for the IS1-System
✗It is permitted to connect to the module either electric circuits
with type of protection Ex nL, non-energy limited electric
circuits with type of protection Ex nA or non-Ex electric
circuits. It is not permitted to mix both in one module!
✗When connecting electric circuits with type of protection
Ex nL the maximum values of connected field devices must
be compatible to the maximum values of the module inputs.
According to IEC/EN 60079-15 the following applies: Ui)Uo,
li)Io, Pi)Po, Ci+Ccable (Co, Li+Lcable (Lo.
✗After the module has been connected to a non-energy limited
electric circuit the feature "Ex nL" of the module is no longer
guaranteed. Before next use as associated energy-limited
equipment the module must be checked by the manufacturer
or any other appropriate authority for its serviceability.
✗The Ex nL electric circuits may also be used in areas of
Zone 22 with dust explosion hazard. In this case ensure that
connected electric equipment is appropriately certified
according to specifications of the category 3D.
✗If Ex nL electric circuits are connected to the module, then it
is possible to work on electric circuits as well as to plug in and
pull out the plug-in terminals X1 and X2 also during operation
in Zone 2.
✗If non-energy limited electric circuits are connected to a
module, then it is allowed to operate the module in Zone 2
only if de-energised or for maintenance purposes while
considering IEC/EN 60079-17 Part 4.6. The plug-in terminals
X1 and X2 for the input electric circuits must be secured
against loosening by means of a gland.
✗The screens on the fieldbus cabling must be connected to the
equipotential bonding system of the hazardous area! For this
purpose the screens on the fieldbus cabling must be
connected to the screen bars installed in the enclosures as
close as possible to the entry point! The screen bars must
also be connected to the mounting plate close to the entry
points for the fieldbus cabling by the shortest possible route!
Assembly and Installation
Marking of the plug-in terminals X1 and X2
•When connecting the Ex nL electric circuits cover the yellow
warning signs ➀on the terminals with the signs enclosed to
the module with Ex nL marking.
•The signs with type specification ➁enclosed to the module
must be placed on the terminals according to the drawings
under the warning sign.
Assembly on the BusRail
•Connect the field devices to the plug-in terminals X1 and X2.
•If necessary, place the Ex nL markings onto the terminals.
•Connect screens on the fieldbus cabling to earth bars as
close as possible to the entry point.
•Position the module vertically at the intended slot of the
BusRail.
•Engage the module by slightly pressing it.
•If necessary, engage the partition between the modules.
•Plug in the plug-in terminals X1 and X2 into the module and
secure it by means of screws against loosening.
Replacing the Module
•Before working on non-enery limited electric circuits ensure
that they are de-energised!
•Loosen the screws of the plug-in terminals X1 and X2.
•Pull out the terminals from the module.
•If necessary, remove the partition.
•Pull the red detent lever of the module upwards to unlock the
module.
•Remove the module vertically from the BusRail.
•Position the new module vertically onto the BusRail and
engage it by slightly pressing it.
•If necessary, engage the partition between the modules.
•Plug in the plug-in terminals X1 and X2 into the module and
secure them by means of screws against loosening.
The national installation instructions
(e.g. IEC/EN 60079-14) must be observed.
Intrinsically-safe and non-intrinsically safe circuits must
not be used in a common conduit!
Ensure that there is a distance of at least 50 mm left
between the connection parts of intrinsically-safe and
non-intrinsically safe circuits!
Assemble a partition (ID-No.: 162740) before
assembling the module near a Zone 1 module (94../.2)!
Performing any work on non-energy limited electric
circuits in a hazardous area is allowed only if de-
energised. The plug-in terminals X1 and X2 must be
secured against loosening by means of glands.
The screens on the fieldbus cabling must be connected
to the equipotential bonding system of the hazardous
area!
For this purpose the screens on the fieldbus cabling
must be connected to the screen bars installed in the
enclosures as close as possible to the entry point!
The screen bars must also be connected to the
mounting plate close to the entry points for the fieldbus
cabling by the shortest possible route!
The module and plug-in terminals X1 and X2 can be
safely connected or disconnected during operation in
potentially explosive area (hot swap).
In energy-limited electric circuits the plug-in terminals
can be safely plugged in or pulled out during operation
in the hazardous area.
Risk of confusion!
The plug-in terminals X1 and X2 must be marked in
accordance with the connected electric circuits.
Spring clamp terminals
ID-No.: 162710, 162720
Screw terminals
ID-No.: 162708, 162719
05684E00
A connection diagram is imprinted on the rear side of
the symbol label at the protective cover.
Operation of the module is permissible only in the
following assembly positions:
Vertical assembly with a plug-in terminals below, on the
left or right.
Before working on non-enery limited electric circuits
ensure that they are de-energised!
Before removing the partition between the module and
a Zone 1 module the plug-in terminals X1 and X2 must
be pulled out of the module to be replaced!
When replacing the module with a module identical in
construction the previous parameters are applied. No
further settings are necessary.
When replacing the module by another module it is
identified correctly at the slot, since the previously set
parameters do not suit this module, it reports a
configuration fault. The module must be either
parameterised again or it is necessary to connect the
module of the right type.
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