Intrinsic Safety - RayTek TX Operating Instructions Manual

Appendix

9.4 Intrinsic Safety

The Smart unit
Ex II 2 G EEx ib IIC T4. The power supply barrier for the unit must be ordered separately.
This intrinsically safe unit is available with a water cooled housing. The water cooled housing can
provide a cooler, more stable operating environment for the electronics but does not allow for
approved IS operation when external ambient conditions are above 70°C (158°F).
The recommended power supply barrier for the unit consists, in its simplest form, of two parts from
the CONTRANS I series, manufactured by ABB Automation (formerly Hartmann & Braun):
XXXAOIS2 – Intrinsically Safe isolating Driver, Part # V17151-620
Din Rail mounted Sockets:
XXXAOIS1 – socket for one driver, with integrated power supply for input voltages of 95 to
253 VAC (V17111-130)
XXXAOIS6 – socket for one driver, with integrated power supply for input voltages of 19 to
33 VDC (V17111-120)
XXXAOIS3 – socket for up to eight drivers (V17111-251)
XXXAOIS4 – socket for up to 16 drivers (V17111-351)
The CONTRANS I interface modules are a series of driver modules, power supplies, and backplanes,
all of which can be intermixed to provide the best solution for a specific application. The
recommended solution, consisting of a single intrinsically safe isolating module and a single power
supply socket, is only one of several combinations possible.
Explosion critical area
Units with Intrinsic Safety (IS) rating are also available made from stainless steel.
If you received a model with intrinsic safety option (shown on the housing), please consider the
following IS Certificate of Conformity.
42
is available with
Figure 34: Intrinsic Safety Installation (example)
an optional Intrinsic
Socket
Isolating Driver
U = 22 V
i
I = 30 mA
i
P = 660 mW
i
L = 0,17 mH
i
C = 16 nF
i
Rev. O 06/2011
Safety (IS) rating
Power
HART
Adapter
TX
of