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Chapter 4 – Installation
4.1 Installation Overview
Caution
Warning
4.2 Installation Notes
Issued Nov-09
ControlWave GFC IS Communication Interface Manual (CI-CW-GFC-ISTRAN)
The IStran and the communications device reside in a non-hazardous or
Division 2 rated area, while the CW-GFC-IS resides in a Division 1,
Division 2, or non-hazardous area.
You must provide a suitable enclosure for the IStran. When you mount
the IStran in a Division 2 area, you must make the non-hazardous
interface connections in accordance with Article 501-4(b) of the
National Electrical Code NFPA 70.
When you connect the IStran to a CW-GFC-IS mounted in a Division 1
area, wire all circuits according to wiring methods specified in article 504
of the National Electrical Code NFPA 70. Contact your IStran supplier for
assistance.
When you install the IStran in a Division 2 area, ensure that the area is
non-hazardous before you connect or disconnect the non-hazardous
interface.
Use four #6 screws with lock washers to secure the IStran to a grounded
metal panel. Illustrations in Chapter 1 show the physical dimensions of
the IStran units. The four mounting holes/slots are 0.156" in diameter.
Total height is approximately 1". The case material is 5052 aluminum
with a black anodize finish. The thickness of the base is 0.060", and the
top is 0.090". The case hardware is stainless steel.
The IStran accepts stranded wires up to 14AWG. When you must insert
two wires in a single position, 18AWG is the maximum recommended
size. The recommended strip length is 1/4 inch, and the insulation must
not extend into the connector clamp. For cables, use 26AWG or larger
conductors and do not configure them as twisted pairs. If you use a
shield, connect it only at one end, closest to the system ground
reference. For optimum performance over long distances, use low-
capacitance cables. In the multi-drop configuration, keep all IStran units
in close proximity.
Secure all wiring before you apply power to the IStran or to the
associated devices. For intrinsic safety applications, use a single cable to
connect the IStran hazardous interface to the intrinsically safe device.
Maintain a minimum 2" separation between the intrinsically safe wiring
and all other wiring. Install the IStran hazardous interface near the point
where the intrinsically safe wiring exits the enclosure housing the
Installation
4-1
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