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NSC Sicherheitstechnik B02840-00 Input/Output Unit With Isolator
Unfortunately, we no longer supply products by NSC. Please visit the Fire Extinguishing section for alternative options.
NSC Sicherheitstechnik's B02840-00 is an Input/Output Unit with Isolator. This product offers two voltage-free, single pole, change-over relay
outputs, a single monitored switch input and an
unmonitored, polarised opto-coupled input.
The Input/Output Unit supervises one or more
normally-open switches connected to a single pair
The Input/Output Unit is fitted with a bi-directional
short-circuit isolator and will be unaffected by loop
short-circuits on either loop input or output.
The Input/Output Unit is loop powered and
operates at 17-28V DC with protocol voltage pulses
The unit will operate only with control equipment
using the Apollo XP95 or Discovery protocol.
The Input/Output Unit is normally supplied with
a backbox for surface mounting. It is also available
without the backbox for flush mounting. Both versions
are designed for indoor use only.
Four LEDs, two red and two yellow, are visible
through the front cover of the enclosure.
One red LED is illuminated to indicate that the relay
is set. The second red LED is illuminated to indicate
that the switch input is closed.
One yellow LED is illuminated whenever a fault
condition (open or short circuit) has been detected
The other LED is illuminated whenever the built-in
isolator has sensed a short-circuit loop fault.
The enclosure is moulded from the same
polycarbonate as Apollo detectors.
Please note - Product designs and specifications are subject to change without notice. The user is responsible for determining the suitability of this product.
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