GST DI-9301E Addressable Single Input and Output Relay Module (LPCB Certified)

Description

The GST DI-9301E Addressable Single Input and Output Relay Module is an intelligent, loop-powered control interface engineered by GST (Carrier) to provide bidirectional monitoring and command switching for fire protection systems. Operating on advanced digital communication protocols and analog-to-digital (AD) sampling, the GST DI-9301E controls external plant equipment—such as fire dampers, smoke extract fans, elevator recall circuits, and door release mechanisms—while simultaneously monitoring equipment return feedback via its supervised input port. Certified under European EN 54-18:2005 standards and approved by LPCB, the GST DI-9301E delivers reliable switching and continuous wiring fault surveillance.

Technical Specifications Table

Bidirectional Plant Control & Programmable GST DI-9301E Logic

The operational core of the GST DI-9301E combines a volt-free relay output with an independent analog-to-digital (AD) monitored input circuit. When a fire condition is confirmed by the central panel, the GST DI-9301E energizes its internal dry contacts (rated up to 2A @ 30 VDC) to shut down air handling units, release magnetic door holders, or command elevator grounding. Concurrently, the module monitors external limit switches on the controlled apparatus to send a positive confirmation signal back to the fire alarm panel once the mechanical action is completed.

To support diverse system architectures, the GST DI-9301E provides versatile addressing capabilities. Using the GST P-9910B handheld programmer, technicians can assign a single shared address for linked input/output actions or configure dual discrete addresses (occupying consecutive addresses from 1 to 241). This allows the input circuit to function as a completely separate monitor point elsewhere on the floor while the output relay serves general building control sequences.

The input circuitry of the GST DI-9301E offers three software-selectable operating modes: Normally-Open (supervised with a 4.7 kΩ resistor), Normally-Closed (supervised), or “Self-Answering” mode. In self-answering mode, physical input monitoring is disabled and the module automatically generates a status feedback confirmation directly to the central panel whenever the relay changes state. The unit snaps onto standard 35mm DIN rails or mounts to flat interior surfaces, making multi-module cabinet assemblies fast and orderly.

• Dual Input & Output Functionality: Drives plant control sequences while independently verifying mechanical limit switch status.
• Selectable Addressing Architecture: Operates under a single shared address or two distinct consecutive addresses on the signaling loop.
• Programmable Contact Supervision: Configurable for N/O, N/C, or automated self-answering confirmation modes.
• Dual Front-Panel Diagnostic LEDs: Dedicated red indicators display input feedback, output state, and specific line fault conditions.

Frequently Asked Questions (FAQ)

Q1: What is the switching capacity of the relay contacts on the GST DI-9301E?
A: The GST DI-9301E relay provides volt-free Form-C contacts (NO, NC, COM) rated for resistive loads up to 2A @ 30 VDC (or up to 30 VAC).

Q2: Can the input and output functions on the GST DI-9301E operate independently?
A: Yes. By configuring the module for dual-address mode using the P-9910B programmer, the input port and output relay receive separate loop addresses and can monitor and control entirely unrelated devices.

Q3: What is “Self-Answering” mode on the GST DI-9301E?
A: In Self-Answering mode, the module disables external input line monitoring and automatically transmits an activation feedback confirmation to the fire panel whenever the relay output energizes.

Q4: What resistor is required for supervising the input circuit on the GST DI-9301E?
A: The input monitoring loop requires a 4.7 kΩ (0.25W to 1-Watt) end-of-line resistor connected across the final field contact to supervise open and short circuit faults.

Q5: Can the GST DI-9301E directly switch high-voltage 220 VAC mains loads?
A: No. The internal relay is rated for low-voltage circuits (≤ 30 VDC/VAC). To switch 220 VAC loads such as heavy exhaust fans or pump starters, the GST DI-9301E must pilot an external heavy-duty contactor or power relay.

Q6: How is the GST DI-9301E mounted inside electrical cabinets?
A: The GST DI-9301E features integrated DIN-rail clips for standard 35mm rails and also includes rear screw tabs for direct wall or surface mounting (67 mm × 40.5 mm hole spacing).