WМ100-4B 4-port Short Circuit Isolator (SCI)

WМ100-4B Short Circuit Isolator

The WМ100-4B is a stand-alone 4-port short-circuit isolator designed to enable organizing of two separate spurs of addressable devices connected to the main loop and provide protection from short circuits for all ports. The WМ100-4B SCI is used to provide additional reliability for a fire alarm system by isolating a spur in which a short circuit has occurred.

The WМ100-4B short-circuit isolator is non-addressable, the control panel does not indicate its state but detects and displays the disappearance of devices in an isolated loop section.

Features
Technical Data
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Certificate (CoC)

- detection of short circuit faults in the loop sections
- minimization of the loop disruptions caused by short circuits
- 4 short circuit LED indicators (yellow)
- automatic loop section de-isolation upon short-circuit removal
- loop powered
- up to 32 devices may be installed in one spur

Operating voltage V_min…V_max	15…. 28 V DC
Loop voltage (with protocol pulses)	≤ 38 V
Isolating voltage V_{SC MAX}	≤ 14,5 V
Re-connect voltage V_{SO MIN}	≤ 10,5 V
Max. continuous loop current I_Cmax	≤ 0,15 mA
Max. continuous current with the switch closed I_Smax	≤ 0,8 A
Max. leakage current with the switch open (with LED) I_{l max}	≤ 30 mA
Max. short-circuit switching current I_Smax	≤ 3,0 A
Max. series resistance, switch closed Z_Cmax	≤ 0,13 Ω
De-isolation impedance Z_SC	500 … 600 Ω
Dimensions (L x W x H), mm	69,7 х 64,6 х 27,5
Weight	≤50 g
IP raiting	IP30
Operating temperature	-10 ºС to +65 ºС
Humidity	up to 95 % (non-condensing)
Average service life	10 years