HomePersonal SafetyFire Extinguishing › NSC Sicherheitstechnik B02840-00 Input/Output Unit With Isolator

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 of cables.

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 of 5-9V.


The unit will operate only with control equipment using the Apollo XP95 or Discovery protocol.

Data Sheet
Installation Guide

NSC Sicherheitstechnik B02840-00 Input/Output Unit With Isolator


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.

Back To Last Page

Modular System

Solution F1

Compact System

Solution F2

Detectors and Alarm Devices

B02700-00 Discovery Optical Smoke Detector

B02704-00 Discovery Optical/Heat Multi Sensor Detector

B02706-00 Discovery Heat Detector

B02725-00 Discovery Manual Call Point

B02750-00 Discovery Mounting Base

B07964-00 Open Area Alarm Device

B07974-00 Sounder Beacon Base


B02840-00 Input/Output Unit With Isolator

B02842-00 XP95 Three Channel Input/Output Unit

Part Number Index

Part Number Index

Want A Quotation?

Please fill out the following fields and we will e-mail you a quotation shortly.