User guide

System Hardware
System Description, AutroSafe Integrated Fire & Gas Detection System, 116-P-ASAFE-IFG/XE Rev. B, 2005-10-27,
Autronica Fire and Security AS
Page 21
4.4 PowerLoop 4-20 mA Input Unit BN-342
4.4.1 Description
The PowerLoop 4-20mA Input Unit BN-342 is a general purpose
PowerLoop interface designed for third party detectors connected to
the AutroSafe Integrated Fire and Gas System.
The PowerLoop is a two-wire power and signalling bus connected in
ring topology and is galvanically isolated from the rest of the system.
The unit communicates with AutroSafe using the PowerLoop protocol.
The unit has a 4-20mA input galvanically isolated from the
PowerLoop.
For further information, refer to data sheets.
4.4.2 Versions
• BN-342/EX*: EEx me version including 9,5W DC/DC for external
detector power supply
• BN-342/1: 19” 3U rack version, bare PCB with 19” rack front
panel, no DC output
• BN-342/2*: DIN rail version, bare PCB in a open DIN rail box, no
DC output
* See next chapter.
4.4.3 Options selected in AutroSafe Configuration Tool
The configuration of the options is described in detail in the Help file
integrated into the AutroSafe Configuration Tool.
• Simrad GD-10P Interface
• Sieger Excel OPGD*
• Sieger Excel Duct*
• Dräger XP Tox
• General purpose 4-20 mA unit (configured in AutroSafe
Configuration Tool)
* Sensor-power must be supplied from an external source.
• See also datasheet for BN-342.