

005128 | Silent Knight 4-Channel Digital Fire Alarm Communicator 120VAC / 18–40VDC
- Regular price
- $449.00
- Sale price
- $449.00
- Regular price
-
Couldn't load pickup availability
Do you need help?

Product Description P/N: 005128
Description
The Silent Knight 005128 is a 4-channel digital fire alarm communicator designed for reliable transmission of alarm and system status signals to a central monitoring station. Operating on 120VAC or 18–40VDC, it provides stable performance with low current consumption, supporting up to four independent communication channels for enhanced system supervision.
Technical Specifications
Condition | New/Never Used Surplus |
Brand | Silent Knight |
Category | Fire Alarm Equipment |
Part Number | 005128 |
Subcategory | Digital Fire Alarm Communicator |
Type | 4-channel communicator |
Primary Power (AC) | 120 VAC, 60 Hz, 45 mA |
Primary Power (DC) | 18–40 VDC input |
Channel Inputs | 18–30 VDC |
Color | Black |
Dimensions | 4" W × 8.75" H × 1.25" D (10.2 × 22.2 × 3.2 cm) |
Weight | 2 lbs (0.91 kg) |
Standby Current (No Annunciator) | 84 mA @ 24 VDC max |
Standby Current (With Annunciator) | 143 mA @ 24 VDC max |
Alarm Current (No Annunciator) | 154 mA @ 24 VDC max |
Alarm Current (With Annunciator) | 227 mA @ 24 VDC max |
Watchdog Response Time | 50 seconds maximum |
AC Monitor Input (5129 only) | AC trouble output from FACP or 120VAC |
Dry Contact Current | 4.7 VDC, 6 mA max |
Active High Current | 15 mA max |
Total DC Load | 84 mA @ 24 VDC max |
Mounting Type | Wall or panel-mounted configuration |
Construction | Industrial-grade black housing |
Certifications | UL listed for fire alarm communications |
Application | Remote alarm transmission for fire protection systems |
Information About 005128
The Silent Knight 005128 digital fire alarm communicator is designed to ensure secure and reliable signal transmission between a fire alarm control panel (FACP) and a central station receiver. It supports up to four communication channels, allowing redundant signal paths or multi-zone monitoring. This communicator operates on either 120VAC or 18–40VDC, providing installation flexibility in various fire alarm systems. It features low standby and alarm current draw, optimizing system power efficiency. Its compact 4-inch by 8.75-inch enclosure makes it suitable for integration within control panels or remote equipment rooms. With UL listing for fire alarm applications, the 005128 delivers reliable performance in commercial, institutional, and industrial environments.
Key Features
- Four-Channel Design: Provides independent communication channels for transmitting multiple alarm or supervisory signals.
- Dual Power Operation: Operates on 120VAC or 18–40VDC for flexible system integration.
- Low Power Consumption: Optimized current draw in both standby and alarm conditions for efficient energy use.
- High Reliability: Built-in watchdog timer ensures consistent communication performance with a 50-second response time.
- Flexible Input Options: Accepts both AC and DC signal inputs from compatible FACPs or annunciators.
- Compact and Durable Construction: Small footprint allows installation in limited spaces with robust housing for protection.
- UL Listed for Fire Systems: Meets strict regulatory standards for use in fire alarm communication networks.
- Simple Integration: Designed for compatibility with Silent Knight FACPs and third-party systems with standard voltage inputs.
The 005128 delivers the reliability and precision required for dependable alarm signal transmission in fire protection systems, ensuring continuous communication with monitoring centers.
Description
The Silent Knight 005128 is a 4-channel digital fire alarm communicator designed for reliable transmission of alarm and system status signals to a central monitoring station. Operating on 120VAC or 18–40VDC, it provides stable performance with low current consumption, supporting up to four independent communication channels for enhanced system supervision.
Technical Specifications
Condition | New/Never Used Surplus |
Brand | Silent Knight |
Category | Fire Alarm Equipment |
Part Number | 005128 |
Subcategory | Digital Fire Alarm Communicator |
Type | 4-channel communicator |
Primary Power (AC) | 120 VAC, 60 Hz, 45 mA |
Primary Power (DC) | 18–40 VDC input |
Channel Inputs | 18–30 VDC |
Color | Black |
Dimensions | 4" W × 8.75" H × 1.25" D (10.2 × 22.2 × 3.2 cm) |
Weight | 2 lbs (0.91 kg) |
Standby Current (No Annunciator) | 84 mA @ 24 VDC max |
Standby Current (With Annunciator) | 143 mA @ 24 VDC max |
Alarm Current (No Annunciator) | 154 mA @ 24 VDC max |
Alarm Current (With Annunciator) | 227 mA @ 24 VDC max |
Watchdog Response Time | 50 seconds maximum |
AC Monitor Input (5129 only) | AC trouble output from FACP or 120VAC |
Dry Contact Current | 4.7 VDC, 6 mA max |
Active High Current | 15 mA max |
Total DC Load | 84 mA @ 24 VDC max |
Mounting Type | Wall or panel-mounted configuration |
Construction | Industrial-grade black housing |
Certifications | UL listed for fire alarm communications |
Application | Remote alarm transmission for fire protection systems |
Information About 005128
The Silent Knight 005128 digital fire alarm communicator is designed to ensure secure and reliable signal transmission between a fire alarm control panel (FACP) and a central station receiver. It supports up to four communication channels, allowing redundant signal paths or multi-zone monitoring. This communicator operates on either 120VAC or 18–40VDC, providing installation flexibility in various fire alarm systems. It features low standby and alarm current draw, optimizing system power efficiency. Its compact 4-inch by 8.75-inch enclosure makes it suitable for integration within control panels or remote equipment rooms. With UL listing for fire alarm applications, the 005128 delivers reliable performance in commercial, institutional, and industrial environments.
Key Features
- Four-Channel Design: Provides independent communication channels for transmitting multiple alarm or supervisory signals.
- Dual Power Operation: Operates on 120VAC or 18–40VDC for flexible system integration.
- Low Power Consumption: Optimized current draw in both standby and alarm conditions for efficient energy use.
- High Reliability: Built-in watchdog timer ensures consistent communication performance with a 50-second response time.
- Flexible Input Options: Accepts both AC and DC signal inputs from compatible FACPs or annunciators.
- Compact and Durable Construction: Small footprint allows installation in limited spaces with robust housing for protection.
- UL Listed for Fire Systems: Meets strict regulatory standards for use in fire alarm communication networks.
- Simple Integration: Designed for compatibility with Silent Knight FACPs and third-party systems with standard voltage inputs.
The 005128 delivers the reliability and precision required for dependable alarm signal transmission in fire protection systems, ensuring continuous communication with monitoring centers.
