new and legacy 868MHz systems.

Wired variants also compatible with

third-party control units

Engineer-friendly:

a self-supporting lid, built-in spirit-level and revolving

fixing holes for ease of installation including on uneven

surfaces

High-power comfort LEDs and LED strobes:

provides reassurance for the user

Common enclosure for entire range:

impact-resistant polycarbonate construction in a choice

of 3 colours: blue, amber and red

• Selectable between Self Contained Bell (SCB) or Self

Actuated Bell (SAB) modes:

- In SCB mode the sounder, in alarm condition, draws

its power from its integral internal battery

- In SAB mode the sounder is driven from the control

panel

- Low-volume maintenance mode

- Self-supporting lid

- Built-in spirit level

• Sound output 100 dB at 1 meter

• Low current consumption (35mA and 225mA in-alarm

current)

• Lid and rear tamper detection

• Selectable cut-off timer

• Choice of siren tones

• Compliance: EN50131-4 Grade: Grade 2

(SDR-WEXT-G2 and SDR-REXT-G2), or Grade 3

(SDR-WEXT-G3),PD6662:2010, EN50131-4:2009