Honeywell Farenhyt ECS Series - 6: VBUS Wiring

50 ECS Series Manual — P/N 151455:H 2/15/2022
ECS Device Installation Installing the ECS-DUAL50W
Class A Speaker Configuration for ECS-DUAL50W
Figure 4.56 illustrates how to wire speakers to the control panel using Class A wiring.
4.7.6 VBUS Wiring
The VBUS is an analog voice bus that carries the recorded voice messages from the ECS-VCM or ECS-NVCM to the ECS-DUAL50W
amplifiers, or the voice messages generated from a system microphone to the ECS-DUAL50W amplifiers. The maximum resistance on the
VBUS is 20Ω.
The ECS-DUAL50W supports two VBUS channels. The wiring method is the same for both channels. VBUS1 and VBUS2 should never be
wired together.
Connect the VBUS from the ECS-VCM to the ECS-DUAL50W amplifiers as shown in Figure 4.57 and Figure 4.58 or Figure 4.59 and
Figure 4.60 for ECS-NVCM.
supervised,
power-limited
AUDIO CIRCUIT OUT AUDIO CIRCUIT OUT
AUDIO CIRCUIT IN AUDIO CIRCUIT IN
Figure 4.56 Class A Speaker Configuration
AUX
CMD2 CMD1
AUDIO
COMMON
IN
GND
VBUS IN 1
VBUS OUT 1
+
+
Vout1-
Vout1+ Vin1- Vin1+
Vout2-
Vout2+ Vin2- Vin2+
Vout1-
Vout1+ Vin1- Vin1+
Vout2-
Vout2+ Vin2- Vin2+
ECS-DUAL50W
ECS-DUAL50W
ECS-VCM
supervised,
power-limited
Class B
to next
ECS-DUAL50W
UL-listed 15kΩ
EOL at last device
on the VBUS
Figure 4.57 VBUS Wiring for Single Channel for ECS-VCM