GST DI-9300E Addressable Digital Single Input Module (LPCB Certified)

Description

The GST DI-9300E Addressable Digital Single Input Module is a high-performance, loop-powered monitoring interface engineered by GST (Carrier) to integrate third-party dry-contact equipment into addressable fire alarm loops. Operating on advanced AD sampling technology and digital communication protocols, the GST DI-9300E supervises external initiating devices such as sprinkler water flow switches, pressure switches, gas suppression release signals, and fire damper limit switches. Certified under European EN 54-18:2005 standards and approved by LPCB, the GST DI-9300E provides continuous cable supervision to detect open or short circuits along the monitoring line.

Technical Specifications Table

Supervised Dry Contact Monitoring & Microprocessor Logic in GST DI-9300E

The core electronic advantage of the GST DI-9300E is its integrated analog-to-digital (AD) sampling circuitry. Rather than relying on simple continuity loops, the onboard microprocessor continuously measures input circuit resistance across the terminal block. When paired with a 4.7 kΩ end-of-line resistor, the GST DI-9300E precisely distinguishes between a genuine alarm state, an open-circuit wire break, and an accidental short circuit, broadcasting instant status updates to the fire alarm control panel.

Adaptability is built directly into the GST DI-9300E architecture. While factory defaulted to supervise Normally-Open (N/O) contacts, field technicians can easily reprogram the module to monitor Normally-Closed (N/C) dry contacts using the GST P-9910B handheld programmer. This allows seamless integration with specialized security sensors, clean agent release confirmation switches, and industrial power interlocks without requiring extra relay interfaces.

Installation workflows are simplified through flexible mounting choices and low-power design. The compact form factor of the GST DI-9300E snaps directly onto standard 35mm DIN-rails inside control cabinets or mounts to flat surfaces using integrated screw tabs. With a quiescent standby current of just 0.26 mA, system designers can connect numerous GST DI-9300E modules along a single signaling line circuit without risking excessive voltage drop.

• Continuous Cable Supervision: Built-in AD sampling tracks line resistance to immediately report wire breaks or line short faults.
• Selectable Contact Logic: Easily configured for Normally-Open or Normally-Closed dry contacts via handheld programming tools.
• Dual LED Visual Status: Features dedicated red activation and yellow fault LEDs for straightforward local troubleshooting.
• DIN-Rail & Surface Mounting: Compact chassis fits onto standard 35mm DIN rails or into multi-unit module enclosures.

Frequently Asked Questions (FAQ)

Q1: What types of equipment can be monitored by the GST DI-9300E input module?
A: The GST DI-9300E monitors any dry-contact output device, including sprinkler water flow switches, pressure switches, post indicator valves (PIVs), fire damper position indicators, and third-party panel alarm outputs.

Q2: Does the GST DI-9300E require an external 24V power supply to operate?
A: No. The GST DI-9300E is entirely loop-powered, drawing minimal current (≤ 0.26 mA standby) directly from the 2-wire signaling line circuit (SLC).

Q3: How is the loop address set on the GST DI-9300E module?
A: The address (from 1 to 242) and contact mode (N/O or N/C) are configured electronically using the GST P-9910B handheld programmer, connected via terminal clips or the 3.5mm programming jack.

Q4: What end-of-line resistor value is required for supervising the input circuit?
A: The input circuit requires a 4.7 kΩ (1-Watt or 0.25W) end-of-line resistor connected across the final field contact to enable cable supervision.

Q5: What do the LED indicators on the front of the GST DI-9300E signify?
A: The red Active LED illuminates steadily during an alarm activation and flashes in normal polling, while the yellow Fault LED flashes at 0.5-second intervals if an input wiring fault (open/short circuit) occurs.

Q6: Can multiple GST DI-9300E modules be mounted inside a single cabinet?
A: Yes. The GST DI-9300E features integrated DIN-rail clips designed for standard 35mm rails, allowing high-density side-by-side mounting inside electrical cabinets or modular multi-box enclosures (e.g., GST-MBX22 / GST-MBX29).