All reporting fire alarm systems must communicate with an outside receiver. The radionics d928 Dual Phone Line Switcher enables fire alarm systems to use and supervise two separate communication phone lines from their control panels, providing two independent phone lines. Once checked for voltage of 6VDC or above, swap wires between Phone Line 1 and Line 2, so your control panel may attempt sending reports on both phone lines simultaneously.
Dual Phone Line Switcher
The Dual Phone Line Switcher enables a control panel to manage and supervise two separate phone lines simultaneously, making it ideal for schools, factories and care facilities where relaying reports off-premises is critical for protecting lives and property. When initial attempts at communicating with receiver via primary line fail, switching over to backup line and trying again; after 10 unsuccessful attempts communication failure mode kicks in and COMM FAIL event displays on all keypads; trouble sounders can also be programmed to notify after failed report transmission attempts if desired; it works with D9412GV2 listed UL864 9th Edition control panels as well as D7412GV2 listed UL864 8th Edition control panels compatible with D9412GV2 listed UL864 8th Edition control panels only; see D9412GV2 for compatibility information on switching options compatible control panels listed as per UL864 9th Edition control panels or D7412GV2 listed UL864 8th Edition control panels compatible with both D9412GV2 listed UL864 8th Edition control panels listed as well. Compatible control panels listed as well.
Programmable Logic Controller
Programmable logic controllers (PLCs) are microprocessor-based industrial computers designed to automate different electromechanical processes. PLCs take input from machines or devices and make decisions based on preconfigured rules to decide what output should be sent out based on input received. PLCs are among the many components required for SCADA systems and used across industries ranging from manufacturing to food processing; known for their rugged construction that can withstand harsh environments as well as easy programming capabilities and low power consumption, PLCs are widely utilized within these environments and widely utilized within SCADA systems.
These digital devices feature multiple arrangements of digital and analog inputs and outputs, built to withstand harsh industrial environments including extended temperature ranges, dust accumulation and electrical noise. Depending on their model they may also offer Wi-Fi capability, motion control features or data logging features.
Security systems often utilize programmable logic controllers to detect intrusions and signal alarms to the control panel, keypads or public telephone network. This technology can also be combined with wireless and hardwired sensors to monitor activity at a property. A PLC may connect directly to a central station for remote monitoring and control.
The D928 can control multiple points of protection and can send reports to up to four phone numbers simultaneously. Each area can be individually or collectively armed with one account number; and its event log stores up to 1000 events and modifiers that can be seen at its keypad interface, printed locally using D9131A Module with parallel printer, or uploaded using Remote Programming Software.
Programmable Receiver
The ATS-25 features an eye-catching LCD display and offers plenty of inputs and outputs (audio line out, headphone jack, USB audio out), plus an eye-catching phono EQ loop and record output bus. In the back are 12 RCA female plugs including USB-b streaming input as well as three component inputs with labels to suggest device assignments; additionally there are RF coax and optical digital inputs provided to connect external devices like ham radio modems.
This receiver features an internal lithium ion polymer battery and uses a micro USB C connector for firmware updates and programming. A user-friendly menu system enables easy configuration of memory channels, assign input device configurations to each of the six RCA jacks on the front panel (USB, AUX), configure SCENE buttons found both remote control and receiver for powering on and setting specific inputs for playback, as well as power off/save functionality of SCENE buttons found both devices.
While our test sample was functional, it still experienced some performance-related issues. These included loud noise or warble in both SSB and Sync modes as well as an unnerving heterodyne issue which may result in some unpleasant “chuffing” noise on your end.
Dean B’s new ATS-25 firmware upgrade (4.0) made all the difference for us and is much more enjoyable! Not to mention it adds another level of fun! With double sideband synchronized detection, Wi-Fi support (not tested yet), retro looking S-Meters, an option to change memory channel entry GUI from its traditional bar type style into an analog meter style format and much more, it has made our lives better!
The 4.0 firmware has addressed an annoying flaw we were experiencing with the 3.6 software: memory channel entries could become 16 kHz lower when activated – though fortunately this anomaly seems to vary according to signal strength. Overall, the 4.0 firmware upgrade has transformed the ATS-25 into an exceptionally capable and enjoyable portable communications receiver in its price range! I would like to express my sincerest thanks for all Dean B’s hard work in making this possible – keep up the fantastic work! As new firmware versions come out, we’ll continue testing the ATS-25. It is a truly enjoyable little receiver and we highly recommend it to those willing to be patient enough with its few quirks – this HF radio offers exceptional value at this price range or higher!
