Apollo XP95 Sounder Control Unit
The Sounder Control Unit XP95 is an essential component in modern addressable fire detection systems, designed to control and monitor the operation of audible and visual warning devices such as sounders and beacons. Manufactured with precision and reliability in mind, this unit is part of the trusted XP95 range, known for advanced technology and dependable performance.
Engineered for use in commercial and industrial environments, the Sounder Control Unit XP95 provides an intelligent interface between the control panel and external alarm devices. It is capable of switching sounders or other alarm outputs, offering flexibility in configuring various types of alert scenarios. Whether the system requires phased evacuation tones, voice alarms, or synchronized beacon operation, this unit ensures precise and timely response.
The unit is powered directly from the loop and supports both continuous and pulsed outputs. It also features built-in line monitoring, which detects open or short circuits on the output wiring, maintaining system integrity and compliance with safety regulations. The XP95 protocol allows for fast, secure communication and easy integration with other addressable modules and devices in the network.
Installation is simple and secure, thanks to the unit’s DIN-rail or surface mounting options. LED indicators provide local visual feedback for activation and fault status. In addition, the Sounder Control Unit XP95 includes a built-in isolator to ensure that any short-circuit on the loop does not compromise the entire system’s functionality.
One of the key benefits of the Sounder Control Unit XP95 is its versatility. It can be used in various applications, including office buildings, shopping centers, hospitals, and manufacturing facilities. By allowing precise control over external sounders and indicators, it enhances the overall responsiveness and efficiency of fire safety systems.
Whether for new installations or system upgrades, the Sounder Control Unit XP95 stands out as a reliable and intelligent choice. Its robust features, compact design, and full XP95 compatibility make it an excellent addition to any fire protection infrastructure.
Technical Specifications
The Apollo XP95 Sounder Control Unit with Isolator operates directly from the two-wire detection loop, with a rated loop voltage range of 17–28V DC and an external power input option of 9–32V DC for driving higher-current sounder or beacon loads that exceed what the detection loop itself can supply. Quiescent current draw is approximately 1.95 mA at 24V, rising to around 3.6 mA at 24V when the unit is in a fault-monitoring state, which is a meaningful figure when calculating total loop loading on larger addressable systems.
The built-in short-circuit isolator has an on-resistance of approximately 0.2Ω and is rated to switch up to 3A, so a wiring fault on one branch of the loop is isolated automatically without disabling detection or sounder control on the rest of the system — a critical requirement on any addressable fire system where a single cable fault must never take down the whole loop. Addressing is configured via on-board DIL switches, supporting both individual device addressing and group addressing, so multiple sounder control units can be triggered together as a single evacuation zone without additional programming at the panel.
| Parameter | Value |
|---|---|
| Manufacturer | Apollo |
| Product Range | XP95 |
| Product Type | Sounder Control Unit with Isolator |
| Loop Voltage | 17–28V DC |
| External Power Input | 9–32V DC |
| Quiescent Current | Approximately 1.95 mA at 24V (around 3.6 mA at 24V in fault-monitoring state) |
| Isolator | On-resistance approximately 0.2Ω, rated to switch up to 3A |
| Addressing | On-board DIL switches, individual and group addressing |
| Outputs | Continuous-tone and pulsed sounder outputs, synchronized beacon operation |
| Mounting | DIN rail or surface-mount back box |
| Standards | EN 54 |
Compliance and System Integration
As part of the XP95 protocol range, the unit is designed for full compatibility with Apollo XP95 and Discovery-compatible fire alarm control panels, and is intended for use in systems built to EN 54 fire detection and alarm standards, which is the baseline compliance framework specified on most commercial and industrial fire protection projects across Oman and the GCC. The unit supports both continuous-tone and pulsed sounder outputs, along with synchronized beacon operation, allowing a single control unit to manage phased evacuation strategies or voice-alarm-triggered visual signaling as required by the site’s fire strategy document.
Typical Applications
Sounder control units of this type are specified wherever an addressable fire panel needs to drive conventional (non-addressable) sounders, beacons, or a mix of both from a single loop-powered point — common in office towers, shopping malls, hospitals, hotels, and manufacturing facilities where large numbers of alarm devices must be zoned and controlled individually rather than as one blanket circuit. In GCC commercial construction specifically, this type of isolator-equipped control unit is frequently required by local civil defense fire codes to guarantee that a single cable fault cannot disable alarm notification across an entire floor or wing.
Installation Notes
The unit mounts on a standard DIN rail or directly to a surface-mount back box, and terminates onto screw terminals sized for typical fire-rated cable used on addressable loops. On-board LED indicators give a clear local visual status — normal, activated, or fault — which speeds up commissioning and fault-finding without needing to interrogate the panel from every device location. Because the isolator function is built into the same unit rather than requiring a separate isolator module, cable runs and panel programming are both simplified compared with older two-module designs, reducing both installation time and the number of addresses consumed on the loop.
Ordering Notes
When quoting this device, Seven Star LLC confirms the intended supply arrangement (loop-powered only, or with an external 9–32V DC supply for higher sounder loads), the addressing scheme required by the site’s fire strategy, and compatibility with the specific make and model of control panel already installed, since addressable fire devices are protocol-specific and must match the existing panel network exactly.
Why Seven Star LLC
Seven Star LLC supplies genuine Apollo XP95 fire detection and alarm devices, including this sounder control unit with isolator, to contractors and system integrators across Oman and the wider GCC. As a trusted supplier of Apollo fire safety equipment, Seven Star LLC ensures every unit is genuine, properly documented, and supported with the technical guidance needed to correctly size loop loading, isolator placement, and zoning for compliant, reliable fire alarm system design.
Related Products
- Datasheet Apollo XP95 Sounder Control Unit Datasheet Download
Apollo XP95 loop devices
XP95 is the Apollo range of analogue addressable detectors and interfaces. Besides detectors, it includes modules that link the loop to other equipment. The Sounder Control Unit on our site is one of these: it lets the control panel switch and supervise a circuit of conventional sounders fed from an external power supply.Ordering Apollo devices: what we need
Apollo identifies each device by a part number in the form 55000-000 or 55010-000. Send that number, the range name printed on the device, the quantity, and the make and model of your control panel. For detectors, state whether mounting bases are needed and which type.Browse Apollo products by category: Fire & Gas Detector.
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