Silent Knight 6820EVS — intelligent addressable fire alarm control panel with an integrated Emergency Voice System in a single enclosure, expandable to 1,110 SK points.
The 6820EVS combines an intelligent addressable FACP with an Emergency Voice System and is a direct replacement for the 5820XL-EVS. When the EVS features are enabled they are integrated with the fire alarm and voice evacuation functions of the control panel. Emergency voice operation includes an onboard supervised microphone, and all-call and non-active call buttons quickly select all active or all non-active output groups. The system allows emergency messages to be given priority over fire, holds 15 recordable one-minute messages that can be mapped to eight EVS buttons, and is capable of producing 520 Hz tones to meet NFPA 72 requirements. Up to four LOC consoles and eight addressable amplifiers are supported.
On the fire side the panel has one built-in signaling line circuit supporting 159 SK detectors and 159 SK modules, or 127 SD protocol devices, with additional SLC loops added for a maximum of 1,110 (SK) or 635 (SD) points. Six onboard Flexput circuits serve as notification outputs or auxiliary power, alongside a form-C trouble relay and two programmable form-C relays. The built-in DACT is dual technology, IP and POTS, with optional cellular reporting. A common communications and annunciation link allows up to 17 panels to be connected via copper or fiber optic cable. The 6820EVS panels and accessories provide features to meet the requirements for Mass Notification Systems as described in UL 2572 2nd Edition and UL 864 10th Edition.
Specifications
| Intelligent signaling line circuits |
1 (expandable) |
| Addressable device capacity |
1,110 (SK) or 635 (SD) |
| Devices per built-in SLC |
159 SK detectors and 159 SK modules, or 127 SD protocol devices |
| Programmable software zones |
999 |
| Output groups |
999 |
| Output circuits |
6 (expandable) |
| SBUS devices |
24 (16 annunciators, 8 LED modules) |
| LOC units |
4 |
| Addressable amplifiers |
8 (1000 total watts) |
| Recorded messages |
15 recordable one-minute messages, mappable to eight EVS buttons |
| Low-frequency tone |
Capable of producing 520 Hz tones to meet NFPA 72 requirements |
| AC power |
120 VAC, 60 Hz, 3.3 A |
| Standby current |
190 mA |
| Alarm current |
250 mA |
| Flexput circuits |
Terminal block provides connections for six Class B or three Class A NACs or auxiliary power; power-limited, supervised circuitry. Maximum current per circuit 3 A, and cannot exceed 6 A total for all circuits. End-of-line resistor 4.7k ohm, ½ watt for Class B NACs |
| Communication loop |
Supervised and power-limited, Class A or Class B, 32 VDC, 150 mA |
| Relay contact rating |
2.5 A @ 27.4 VDC (resistive), Form C — two programmable relays and one fixed trouble relay |
| Battery |
Cabinet holds a maximum of two 18 AH batteries |
| Battery charger capacity |
7 to 35 AH |
| Dimensions |
21.6" W x 28.1" H x 5.1" D (54.9 cm x 71.4 cm x 13.0 cm) |
| Weight |
50 lbs. (22.7 kg) |
| Color |
Red |
| Notification cadence patterns |
23 preset patterns, including ANSI 3.41 |
| History file |
1,000 events |
| Operating environment |
Meets NFPA requirements for operation at 0 to 49°C (32 to 120°F) and 93% ± 2% RH non-condensing at 32°C ± 2°C (90°F ± 3°F) |
| Standards |
UL 864 10th Edition, UL 2572 2nd Edition; complies with NFPA 72, NFPA 13, NFPA 15, NFPA 16, NFPA 70 |
| Agency certifications |
UL certified S2766; CSFM 7165-0559:0500; FDNY COA# 6249; FM Approved; Seismic (CA) VMA-45894-05C |
| Country of origin |
USA |
Installation notes
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The 6 A Flexput cap is a total, not per circuit: each of the six Flexput circuits is rated 3 A maximum, but all circuits together cannot exceed 6 A. Budget notification load against the 6 A ceiling, not against six times 3 A.
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Amplifier wattage is a separate budget: the panel supports eight addressable amplifiers totalling 1000 watts. Speaker circuit load is sized against that figure, independently of the Flexput NAC current.
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Class A halves the NAC count: the same terminal block yields either six Class B NACs or three Class A NACs.
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SK and SD devices cannot be mixed in the same fire alarm system, and the ceiling differs sharply — 1,110 SK points against 635 SD points.
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Same point capacity as the 6820, larger cabinet: the EVS variant matches the 6820 on SLC capacity, Flexput ratings and battery limits, but the enclosure grows to 21.6" x 28.1" x 5.1" and 50 lbs to house the voice components. Confirm wall space and mounting before ordering as a swap.
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Battery capacity is limited by the cabinet: the charger handles 7 to 35 AH, but the cabinet holds only two 18 AH batteries. Larger standby calculations need the RBB remote battery box.
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Recommended ambient is narrower than the listed range: although the system meets NFPA requirements to 120°F, Honeywell recommends a normal room temperature of 15 to 27°C (60 to 80°F).
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Message priority is programmable: the system can be configured to select EVS messages as priority over fire — confirm the intended sequence with the AHJ.
Replacement
The Silent Knight 6820EVS is a direct replacement for the 5820XL-EVS. It matches the 6820 on SLC capacity, Flexput ratings and battery limits but uses a larger cabinet, so confirm wall space before ordering as a swap.
Related models
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6820 — the same addressable fire platform without the emergency voice system, in a smaller 16.4" x 26.4" x 4.1" cabinet at 32 lbs
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5820XL-EVS — the previous-generation panel the 6820EVS directly replaces
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EVS-50W / EVS-125W / EVS-100W — 50 watt, 125 watt and 50/100 watt amplifiers; EVS-INT50W internal 50 watt amplifier; EVS-100WBU external backup amplifier
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EVS-LOC — local operator console, up to four supported
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EVS-CE4 — provides 4 additional audio circuits; EVS-SW24 24 switch expander
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EVS-RVM — remote voice module; EVS-VCM network voice control module
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6815 — SLC expander for SK devices; 5815XL — SLC expander for SD devices
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6860 / 6855 / 5860 / 5860R — LCD remote fire annunciators
Specifications taken from the Honeywell Silent Knight data sheet "6820EVS Intelligent Fire Alarm Control Panel with Emergency Voice System," document 351606:E (3/7/2022). Manufacturer specifications are subject to change without notice.
Documents
FAQ
What panel does the 6820EVS replace?
Silent Knight states that the 6820EVS is a direct replacement for the 5820XL-EVS fire alarm control panel.
How many addressable devices does it support?
The built-in SLC supports 159 SK detectors and 159 SK modules, or 127 SD protocol devices. With additional SLC loops the panel expands to 1110 points (SK) or 635 points (SD).
How many voice consoles and amplifiers can be added?
The 6820EVS supports up to four EVS-LOC local operating consoles and eight addressable amplifiers, with a total of 1000 watts.
What batteries fit in the cabinet?
The cabinet holds a maximum of two 18 AH batteries, and the charger supports 7 to 35 AH. The RBB remote battery box is available as an accessory cabinet.
