Panasonic Electric Works Nordic ABMEW01351 Rev: - Planning Instructions Fire alarm system EBL512 G3, V1.1.x504313no. 004313no. 01no. Ano. BSegment A Segment BSegment CEBL512 G3A-dir. B-dir. Figure 9. Two 4313 isolators connected to a COM loop givesthree loop segments, i.e. Segment A (A-00), B (00-01) and C(01-B). If more isolators have to be added, the sequencenumbers have to be updated (via WinG3), e.g. if one isolator isput in between isolator no. 00 and no. 01 in the figure, the newisolator has to be no. 01 and the old no. 01 has to be no. 02.Short circuit / cut-off (break) on the COM loopSee chapter "COM loop units", page 37. See also EBL512 G3Operating Instructions, chapter "Fault messages".9.1.5 Units for Hazardous (Ex) areasIn hazardous (Ex) areas, Intrinsically Safe (IS) and approved productsare required. The IS alarm points are connected to an interface outsidethe Ex area.Normally the analog addressable units (IS smoke and heat detectors)shall be used, else conventional units (e.g. IS manual call point).Conventional units are connected via a Galvanic isolator MTL 5061(2820) to an expansion board 4580 Ex zone line input. See alsodrawings 512 G3 – 33 and – 37.Analog / addressable units are connected to a COM loop via an ISbarrier unit 2842. See also drawing 512 G3 – 31.9.1.5.1 Galvanic isolators / IS barrier unitsMTL5061 Galvanic isolator (2820). The isolator is used to connectconventional IS detectors and manual call points to anexpansion board 4580 zone line input (programmed in"Resistor-Ex" mode). The isolator has two zone line inputs andtwo outputs (Channel 1 & 2) and it is mounted in a Waterproofbox (IP66/67). Four compression glands for the cable entriesand an end-of-line resistor (10K) with an area >230 mm2 aresupplied. Box dimensions (L x W x H): 175 x 125 x 150 mm.BASEEFA classification: EEx ia IIC Tamb=60°C.2842 Intrinsically safe (IS) barrier unit.40 The barrier unit is used toconnect analog addressable IS detectors to a COM loop. Theunit has connectors for COM loop in / out, external powersupply (24 V DC, 60 mA) and one IS COM line for connection40 This unit might still be under construction.
