Answer:
The DI-9103E supports three field-programmable operating classes under EN 54-5: Class A1R (rate of rise with fixed temperature), Class A2S (fixed temperature), and Class BS (elevated fixed temperature threshold). It also incorporates a 360° omnidirectional red LED indicator and electronic addressing from 1 to 242.
The GST DI-9103E heat detector incorporates internal digital signal processing that can be configured into three distinct EN 54-5 operational classes to match specific site environments:
- Class A1R: Combines rate-of-rise thermal detection with a fixed temperature ceiling, triggering an alarm when ambient temperatures climb rapidly or reach the fixed limit.
- Class A2S: Pure fixed-temperature threshold sensing, ideal for areas subject to sudden, non-fire thermal variations.
- Class BS: High-threshold fixed temperature sensing designed for elevated ambient heat zones like industrial boiler rooms or drying bays.
The unit features an enclosure constructed from white ABS polymer with a V-0 flame retardancy rating. Visual indication is provided by an omnidirectional red LED offering 360° visibility; the polling pulse can be set to inactive during standby mode and illuminates steadily under alarm. Field addresses (1 to 242) are electronically configured using a GST handheld programmer without manual DIP switches.
