SilentKnight 5104 Digital Alarm Communicator Transmitter 6 Zone - Manual (Page 20)

Model 5104B Installation Manual 151053-L8
3-12
3.10.2 Class B (Style B) Zones
Zones 2 through 6 are class B (style B) fire zones. Each class B zone consists of a two-wire circuit that will
detect the occurrence of an open in the loop, but may not be able to detect an alarm after such an occurrence. The
detection of an open will cause the audible trouble signal to sound and the 5104 will report the trouble to the cen-
tral station.
Figure 3-7 shows how to wire a class B (style B) loop. One side of each class B loop connects to a zone input ter-
minal and the other side of each loop connects to loop power. For each loop, use a 4.7K-ohm EOL resistor wired
in parallel with the normally open contact farthest from the panel.
Figure 3-7 Model 5104B Class B (Style B) Loops
Note: Does not support 2-wire detectors.
Maximum Loop Resistance - 50 ohms
Maximum Total alarm current for all class B (Style B) zones - 750 mA
Maximum Standby Current per Zone:
Output (loop power) 750 mA
Input 0.5 mA
Note: UL requires all wiring to be at least 18 gauge.
Model 7628
4.7 K
 EOL