Category Archives: Bill Root

Tech Tip: EVS-INT50W Power Wiring

The EVS-INT50W is an amplifier that offers a single speaker circuit capable of supporting up to 50 watts of power and is compatible with version 15 of the 5820XL-EVS. Although it is similar to the distributed 50, 100, and 125 watt amplifiers, there are subtle differences.

One of the first things you will notice is that the EVS-INT50W does not come with an enclosure. The reason for this — and why it is described as an internal amplifier — is that it mounts in the 5820XL-EVS cabinet. No external cabinet or hardware is required: this provides the benefit of saving valuable wall space as well as installation time and money.

The other difference you will see is that there is no primary AC and battery backup. The EVS-INT50W is powered by the 5820XL-EVS panel. This is where it can get tricky. To power this amplifier, one of the 6 Flexput™ circuits on the 5820XL-EVS will be programmed for Constant Auxiliary Power and run to the power input on the EVS-INT50W. The SBUS connection, which is normally 4 conductors, will be 2 conductors for the A and B data connections. Do not use the SBUS power (- and +) to power the amplifier. The amplifier draws close to 3 amps in full load. SBUS power only supplies up to 1 amp. Be sure to account for the power draw in your 5820XL-EVS battery calculations.

evs-int50w-tech-tip2

The internal amplifier is an addressable device, so be sure to set the dipswitches on the unit before powering it up. Also ensure that the panel is programmed to look for the address you set on the amplifier. After this, all options are programmable, such as mapping the speaker output for proper activation, 25 or 70.7 Vrms operation, Class A or Class B speaker wiring, and 520 Hz low frequency output.

Have you installed the EVS-INT50W? Please let us know your experience by clicking on the Leave a Reply link above to enter your request. Click here to visit the EVS-INT50W web page.

 

About the Author
Bill Root is the Technical Support Supervisor for Silent Knight. Bill joined Silent Knight in 1988 and is responsible for managing applications and technical support across the Silent Knight product line. Bill is also NICET Level II certified.

Get In Sync With Your Fire Alarm System

The full line of Silent Knight control panels and power supplies support synchronization for System Sensor, Gentex, Wheelock, Faraday, and Amseco devices. The Silent Knight addressable FACPs allow you to select the desired sync protocol through programming of the output groups assigned to the panels’ notification circuits. This allows you the flexibility to not only utilize the various manufacturer’s devices but also the capability to have circuits activate one type of synchronization output while others activate a different synchronization output. The intelligent power supplies (5496, 5895XL) used on the Silent Knight addressable panels are also capable of sync and use the same output group programming as the panel to select the desired sync protocol. It is important to note that Silent Knight does not guarantee that the intelligent power supplies will hold sync with other intelligent power supplies or the FACP.

strobe                 strobe

In applications where system-wide synchronization is required, it is recommended to use the Silent Knight conventional power supplies. The Silent Knight 5495 and 5499 power supplies can be selected for various synchronization protocols via dip switch settings. In addition, these power supplies have the capability to provide a pass-through function where the outputs of the power supply will follow the provided input. In cases where system-wide synchronization is required, a control panel capable of providing the appropriate synchronization protocol is used to drive the input of the power supply, the four outputs of the power supply will all follow and hold synchronization with the control panel. Multiple power supplies can be placed in series in this configuration to provide synchronization power for the largest systems.

 

About the Author
Bill Root is the Technical Support Supervisor for Silent Knight. Bill joined Silent Knight in 1988 and is responsible for managing applications and technical support across the Silent Knight product line. Bill is also NICET Level II certified.

Temporal 4 Notification Solutions

NFPA 720 has designated the Temporal 4 cadence output pattern for notification of carbon monoxide detection (CO) as the industry standard. In most cases, the annunciation of the Temporal 4 output is limited to the affected area and doesn’t require system wide notification. Silent Knight offers multiple solutions for Temporal 4 output: sounder bases, audio outputs and speaker tone.FireCO Temp 4 Detector Image

The B200S and B200S-LF sounder bases which, used in conjunction with the SK-FIRE-CO  detector, can provide the temporal 4 output for CO detection and the Temporal 3 output for fire detection where only localized annunciation is required. In addition, synchronization of the sounder bases for the Temporal 3 and Temporal 4 output can be accomplished through programming on the fire alarm control panel.

In applications where system wide annunciation of a CO alarm is required by the use of horns, Temp 4 Notification Imageyou must use either a 4-wire horn/strobe or horn only devices to achieve the Temporal 4 output. Currently, there are no 2-wire horn/strobes that can provide both the Temporal 4 for a CO alarm and Temporal 3 for fire alarm outputs. It is necessary to have a separate horn circuit that can be programmed to provide the Temporal 4 on CO alarms and Temporal 3 on fire alarms, while using a separate output to drive strobes utilizing the appropriate sync protocol. Again, synchronization of the Temporal 3 and Temporal 4 audio outputs can be programmed for the horns through the fire alarm control panel.

When using the 5820XL-EVS in applications where Temporal 4 is required for the speaker tone, a Temporal 4 or a Temporal 4 with the 520 Hz low frequency tone can be programmed for the speaker output. Synchronization cannot be accomplished through the speaker output.

 

 

About the Author
Bill Root is the Technical Support Supervisor for Silent Knight. Bill joined Silent Knight in 1988 and is responsible for managing applications and technical support across the Silent Knight product line. Bill is also NICET Level II certified.