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Intelligent Input/Output unit
Intelligent Input/Output unit

Intelligent Input/Output unit

The intelligent Input/output unit is included in the BOSEC B-9072-FD-954 - EN54-13 certificate of the MD2400(L) analogue addressable fire detection system.

The intelligent Input/Output unit is equipped with a relay contact 30Vdc/1A (inductive or resistive) and a built-in short-circuit isolator. The address is set using a DIP-switch.

The input of the intelligent Input/Output unit reports the status of a potential-free NO alarm contact and/or a NC fault contact to the MD2400(L) fire alarm control panel. As soon as the contact is switched, the MD2400(L) fire alarm control panel will generate the corresponding alarm and/or fault message.

The cabling between the intelligent Input/Output unit and the contact is monitored for short circuits and open circuits using a EOL resistor at the contact.

The intelligent Input/Output unit is powered via the XP95 loop and does not require an external power supply.

The current consumption per MD2400 loop interface card XP95 is limited to maximum 100mA and per MD2400 high-power loop interface card XP95 to maximum 500mA.

The listed technical specifications are typical at 24V, 25°C and 50% RH unless otherwise stated.

Technical details

Description Intelligent Input/Output unit
Code SA4700-102
Apollo Part No SA4700-102
BOSEC certificate B-9077-FD-K 1019
Certificate of Constancy of Performance 2531-CPR-CSP10991 - EN54-17:2005 & EN54-18:2005
Supply voltage 17 - 35Vdc
Quiescent current 500µA
Alarm current 3.5mA
Output contact Voltage-free changeover contact 30Vdc/1A
Resistor value (Input) EOL resistor 20kΩ
Alarm resistor 1kΩ
Isolator Built-in
Operating temperature -40°C to +70°C
Humidity 0% to 95% RH (no condensation or icing)
IP rating IP52
Dimensions (HxWxD) 60x150x90mm
Weight 244 g
Supply wiring Two wire supply - polarity sensitive