The GST I-9301 Addressable Single Input/Output Module bridges GST intelligent fire alarm control panels (including GST 200, GST 200-2, GST 5000, GST 9000, and GST-IFP8) with external third-party plant, ventilation equipment, life-safety hardware, and auxiliary notification devices. Certified to EN 54-18:2005, the unit provides command execution and contact monitoring within critical commercial and industrial building safety architectures.
Elevator Recall and Vertical Transport Control
During a verified fire incident, passenger lifts must be removed from general service and grounded to designated egress levels. The GST I-9301 operates in volt-free (two-wire) relay mode to signal lift controller panels via its passive normally open (NO) or normally closed (NC) contacts, which are rated up to 5A at 24VDC or 3A at 110VAC. By assigning the module a discrete loop address between 1 and 242, building automation engineers can write specific cause-and-effect matrix equations to recall elevators automatically upon smoke or thermal detection in elevator lobbies or lift shafts.
HVAC Fire Damper Closure and Smoke Management Interlocking
Air handling units and ductwork can quickly spread hazardous smoke and toxic fumes across fire compartments. The GST I-9301 is deployed alongside motor-driven or spring-return fire dampers, smoke dampers, and smoke exhausters. Utilizing passive switching contacts, the module breaks or makes the primary control circuit to initiate damper closure or activate smoke exhaustion plant upon panel command. The module's onboard microprocessor continuously evaluates circuit status, allowing system operators to verify command execution and relay status directly from the panel interface.
Magnetic Fire Door Release and Compartmentation
Containment of heat and smoke relies on rapid compartmentalization. The module interfaces with electromagnetic fire door holders installed across corridors and fire barrier partitions. In standard operation, door holders maintain access paths open under constant power; on fire alarm initiation, the GST I-9301 changes state to de-energize the hold-open magnets, releasing doors to latch shut under their mechanical closers. The 5A at 24VDC passive contact switching capacity accommodates multiple door release loops on a single relay branch.
Supervised Driving of Conventional Notification Appliances
When engineering legacy notification devices or high-output industrial horns, the module operates in active four-wire mode using terminals S+ and S- paired with an external 24VDC power supply (connected via terminals D1 and D2). This configuration outputs 24VDC at 1A to drive conventional notification hardware, such as the C-9403 conventional sounder strobe. In four-wire mode, circuit integrity is supervised using a parallel 4.7kΩ end-of-line resistor. The module automatically detects open circuits, short circuits, or 24VDC power outages and transmits specific fault warnings back to the GST fire panel.
Application Technical Reference
| Deployment Function | Output Configuration | Electrical Capacity / EOL | Line Fault Monitoring |
|---|---|---|---|
| Plant Shutdown / Lift Grounding | Passive Relay (NO/COM/NC) | 5A @ 24VDC / 3A @ 110VAC | Loop integrity monitored via Z1/Z2 |
| Fire Damper / Fan Interlocking | Passive Relay (NO/COM/NC) | 5A @ 24VDC / 3A @ 110VAC | Loop status reporting to FACP |
| Door Holder Release | Passive Relay (NC or NO) | 5A @ 24VDC | Microprocessor status tracking |
| Conventional Sounder Strobes | Active 24VDC Output (S+/S-) | 24VDC @ 1A | 4.7kΩ resistor (short/open/power cut) |
