To facilitate dependable and
simple I/O on Profibus PA in a factory situation, Turck have
designed these rugged junction boxes making field I/O connections
easy and reliable. Made from cast aluminium and powder paint coated,
they have IP67 degree of protection.
All feature In and Out at the
top for the main PA trunk line with an option for 4 or 6 I/O points.
Types are available with or without internal Short Circuit
Protection. Also you can choose between types for General Area use
(up to Zone 2 Hazardous Areas) or for Intrinsically Safe types for
Zone 1 hazardous areas.
The models with Short Circuit
Protection have an adjustable short-circuit limit. The max. current
limit is selected for all channels via a rotary switch. The
following values can be selected: 30, 35, 45 and 60 mA.
Further choice is available in
the connection type you prefer on the junction box. It can be by
hard-wired PVC Cable Glands, by plugging into an M12 stainless steel
connector, or by plugging into a 7/8" stainless steel connector.
Cordsets and field-wireable
connectors are available for these connectors.
Advanced features of these J/Bs
include a pressure compensation element to protect against internal
condensation, integrated end-of-line resistor which can be activated
if required, earth terminals for cables and an earthing bolt for the
enclosure itself and a switch if the cable earth is to be connected
to the housing earth.