Stahl YL5IS Series, Operating Instructions Manual, Page: 13 / 19

252163 / YL560300010
2016-04-20·BA00·III·en·00
Mounting and installation
13
Intrinsically Safe Combination Signal -
105 dB (A) / LED Beacon
Series YL5IS
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7.3.4 Sound tone switching
Sound tone switching by using a third cable
Connect the leads according to the figure.
• Supply "B" with power to activate the first sound tone frequency.
• Supply "B"and "C" with power according to the circuit diagram for the second tone
frequency.
• A dual-channel barrier or double intrinsically safe connection is required.
Tone switching using reverse polarity
• Connect the leads according to the figure.
• Supply with power to activate the first sound tone frequency.
• Reverse the polarity to activate the second sound tone frequency. The sounder PCB
and beacon PCB must be wired independently if using reverse polarity to switch
between sound tone frequencies.
18058E00
A 0v
B +v
C +v
Loop in/loop out wiring to the beacon is possible with this configuration.
18859E00
A 0v
B +v
18859E00
A +v
B 0v
+
-
+ -
5 6
+
-
+ -
5 6