EVS-INT50W
internal Amplifier
Product Installation Document
Description
The EVS-INT50W Internal Amplifier is used to amplify the audio message for distribution throughout the facility for the Emergency Voice System.
The EVS-INT50W Internal Amplifier can fit inside the 5820XL-EVS or 6820EVS cabinets.
1.1 Compatibility
The EVS-INT50W is compatible with the following Silent Knight Series FACPs. For more information, refer to the FACP Installation Manual or the EVS Series Manual (PN:LS10062-001SK-E).
- 6820EVS
- 5820XL-EVS
1.2 Specifications
- Standby Current: 52mA
- EVS-INT50W only Alarm Current @ 25V: 275mA; @ 70V: 310mA
- Full Alarm load current @ 25V: 2840mA; @ 70V: 2900mA
Board Layout
Installation
NOTE: Installation and wiring of this device must be done in accordance with NFPA 72 and local ordinances.
To mount the , refer to the following steps.
- Remove AC power and disconnect backup batteries from the main control panel.
- To mount the EVS-INT50W inside the FACP cabinet below the main board (above the batteries), align the board with the mounting holes and secure the board to the enclosure with the eight supplied screws.
Wiring
4.1 FACP Wiring
See Figure 2 to properly wire the to the FACP. The Internal Amplifier must be powered by a NAC programmed as Constant Auxiliary Power. Refer to the FACP Installation Manual.
4.2 VBUS Wiring
The VBUS is an analog voice bus that carries the recorded voice messages from the EVS-VCM to the EVS-INT50W amplifiers, or the voice messages generated from a system microphone to the EVS-INT50W.
The maximum resistance on the VBUS is 20W.
Connect the VBUS from the EVS-VCM to the EVS-INT50W amplifiers as shown in Figure 3.
Setting the Device Address
Use the onboard DIP switches to select an ID number for the EVS-INT50W. Refer to Figure 4 to see how to set the DIP switches for the desired ID number. Once the ID number is set, add the EVS-INT50W to the system through panel programming. Note that Address 0 is an invalid number and cannot be used.
NOTE: The EVS-INT50W is powered by a NAC on the FACP or by an auxiliary power supply. It will not be found using JumpStart AutoProgramming.
Speaker Wiring
Each EVS-INT50W supplies one circuit for speaker connection. The speaker circuit can be supervised and wired for Class B or Class A. The speaker circuit is capable of 50 watts of power at 25 Vrms or 70.7 Vrms. Refer to the Silent Knight Device Compatibility Document P/N LS10167-004SK for compatible speakers.
| Number Of Speakers | Total Load | Wire Distance in Feet | |||||
| @ ½ W | @1W | Vrms | Watts | 18 AWG | 16 AWG | 14 AWG | 12 AWG |
| 10 | 5 | 25Vrms | 5W | 3900 | 6200 | 9860 | 15680 |
| 70Vrms | 25000 | 39700 | 63200 | 100520 | |||
| 20 | 10 | 25Vrms | 10W | 2125 | 3380 | 5375 | 8540 |
| 70Vrms | 15200 | 24150 | 38400 | 61100 | |||
| 30 | 15 | 25Vrms | 15W | 1460 | 2320 | 3690 | 5870 |
| 70Vrms | 11000 | 17500 | 27800 | 44200 | |||
| 40 | 20 | 25Vrms | 20W | 1100 | 1750 | 2780 | 4420 |
| 70Vrms | 8500 | 13510 | 21500 | 34175 | |||
| 52 | 26 | 25Vrms | 26W | 760 | 1200 | 1920 | 3050 |
| 70Vrms | 6100 | 9700 | 15400 | 24520 | |||
| 80 | 40 | 25Vrms | 40W | 550 | 875 | 1390 | 2200 |
| 70Vrms | 4100 | 6500 | 10360 | 16480 | |||
| 100 | 50 | 25Vrms | 50W | 450 | 715 | 1130 | 1800 |
| 70Vrms | 3500 | 5560 | 8850 | 14070 | |||
Table 1 Wire Lengths
NOTE: The above table assumes a uniform distribution of the speakers, and that a max of 20% voltage drop on the last speaker is allowed.
Figure 5 illustrates how to wire speakers to the control panel using Class B or Class A supervision.
Honeywell Silent Knight
12 Clintonville Road
Northford, CT 06472-1610
203.484.7161
www.silentknight.com
LS10120-001SK-E | D | 02/22
©2022 Honeywell International Inc.
Documents / Resources
 | Honeywell EVS-INT50W Internal Amplifier [pdf] Instruction Manual EVS-INT50W Internal Amplifier, EVS-INT50W, Internal Amplifier, Amplifier |
