Answer:
The MI-WSS-PR-N is EN54-3 approved for audible evacuation signalling. It features a red plastic housing with a red lens and serves as a Visual Indicating Device (VID); it is not approved under EN54-23 as an independent primary Visual Alarm Device.
The Honeywell Morley-IAS MI-WSS-PR-N combines audible and visual notification within a durable red plastic body featuring a red lens:
- Acoustic Compliance: Fully certified and compliant under EN54-3 standards for fire alarm audible sounders.
- Visual Indication Classification: Configured as a Visual Indicating Device (VID) with a 1 Hz flash rate for supplementary alerting. It is not EN54-23 certified as a Visual Alarm Device (VAD) and should not be deployed as the primary evacuation notification method where EN54-23 compliance is strictly mandated.
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