Analog telephone DH9901E

ringdownfire alarmwall-mounted

Product overview
The DH9901E is a two-wire fire telephone extension with address designed for non‑polar wiring and integrated microprocessor control. It operates with a compatible DH99E fire telephone host to provide full‑duplex voice communication. Local addressing is set via a manual rotary dial switch (addresses 1–99). Off‑hook operation initiates calls to the host; communications remain enabled while the handset is off‑hook, enabling simple, reliable site communication.

Key features

• Applicable standards: GB 16806-2006, GB 3380, GB/T 15279-2002
• Operating voltage: DC 24V (pulse width modulation)
• Quiescent/monitoring current: <0.5 mA; communication current: <12 mA
• Non‑polar two‑bus wiring (L1, L2) for simplified installation
• Manual address coding by rotary dial switch; selectable codes 1–99
• Indicator behavior for monitoring, calling and address-invalid states for easy diagnostics
• Compact dimensions: 206 mm × 58.5 mm (with base); recommended installation height ≤ 1.5 m

Technical specifications
Model: DH9901E
Type: Two‑wire fire telephone extension with address
Wiring: Polarity‑free two‑bus (L1, L2)
Addressing: Manual dial switch, addresses 1–99
Voltage: DC 24V (pulse width modulation)
Current: Monitoring <0.5 mA; Communication <12 mA
Indicator: Monitoring indicator flashes once every 5 s; on off‑hook, local address indicator is steady; during host call, ringing indicator off, non‑ringing indicator on; address‑invalid indicator flashes twice every 5 s
Dimensions: 206 mm × 58.5 mm (with base)
Installation height: ≤ 1.5 m

Installation & compatibility

• Designed to work with DH99E fire telephone host units
• Polarity‑free two‑bus simplifies wiring and reduces installation errors
• Local address set on‑site by rotary dial—no programming tool required
• Recommended mounting height ≤ 1.5 m for accessibility

Ordering information
Model: DH9901E
Units: sold per piece; contact supplier for packaging and bulk order options