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Fire Alarm Systems | FLM‑I 420‑S Short Circuit Isolator
FLM‑I 420‑S Short Circuit Isolator
▶ Rotary switch for automatic and manual address
setting
▶ Preservation of LSN loop functions in the event of a
short-circuit by two integrated isolators
Power supply via LSN
▶
▶ Three free screw terminals
The Short Circuit Isolator isolates alarm zones in which a
Functions
short circuit has occurred. This means the functionality of
Features of improved LSN
the remainder of the network remains preserved.
T

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2 | FLM‑I 420‑S Short Circuit Isolator Wiring example: Isolation of separate floors The surface-mounted housing has two cable ducts on • opposite sides: 2 x 2 pre-punched for diameter up to 21 mm/to - 34 mm (for conduits) 2 x 4 rubber bushes for inserting cables with - FLM-I 420-S diameters of up to 8 mm. In addition, there are cable ducts on the base of the • surface-mounted housing: 1 x pre-punched cable ducts for diameter up to - III 21 mm (for conduits) 2 x 4 rubber bushes for inserting cabl

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FLM‑I 420‑S Short Circuit Isolator | 3 Environmental conditions Permitted operating tempera- -20 °C to 50 °C ture (-4 °F to 122 °F) Permitted storage tempera- -25 °C to 85 °C ture (-13 °F to. 176 °F) Permitted relative humidity < 96% Classes of equipment as per Class III equipment IEC 60950 Protection class as per IP 54 IEC 60529 Ordering Information FLM‑I 420‑S Short Circuit Isolator FLM-I 420-S for the isolation of alarm zones in which a short circuit has occurred. Accessories FLM‑IFB126‑S Sur

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4 | FLM‑I 420‑S Short Circuit Isolator Americas: Europe, Middle East, Africa: Asia-Pacific: Represented by Bosch Security Systems, Inc. Bosch Security Systems B.V. Robert Bosch (SEA) Pte Ltd, Security Systems 130 Perinton Parkway P.O. Box 80002 11 Bishan Street 21 Fairport, New York, 14450, USA 5600 JB Eindhoven, The Netherlands Singapore 573943 Phone: +1 800 289 0096 Phone: + 31 40 2577 284 Phone: +65 6258 5511 Fax: +1 585 223 9180 Fax: +31 40 2577 330 Fax: +65 6571 2698 security.sales@us.bosch