TELEFIRE LI-3000 Line isolation module

The TELEFIRE LI-3000 is an addressable line isolator module that provides advanced protection against short circuits in SLC (Signaling Line Circuit) loops. The module automatically isolates the faulty section from the rest of the loop, enabling continuous system operation even under fault conditions. The LI-3000 communicates with ADR-7000 and ADR-3000 control panels through the addressable SLC loop, which also provides its power supply.

Key Features

Automatic fault protection: After power up or system reset, the isolator checks for short-circuit conditions. If no short-circuit is detected, it switches the circuit on and enables normal operation of the second SLC loop connection.

Intelligent re-test cycle: When a short-circuit occurs, the isolator automatically opens the circuit and disconnects the faulty side. It retests after 3 seconds, then again after 1 minute. It repeats testing for 8 minutes, then performs periodic checks every 2 minutes.

Visual indications: The yellow LED flashes each time the module is addressed by the control panel. A short-circuit condition causes the LED of the shorted side to latch on. In Class A configuration, an open circuit sends a trouble message to the control panel.

Address programming: The module’s address must be set using the PROG-4000 device programmer prior to installation. The address can be selected between 1-.

Technical Specifications

• Module PCB dimensions: 65 x 65 mm
• AIB-800 enclosure dimensions: 133 x 119 x 36 mm
• Operating temperature range: -10°C to +60°C
• Relative humidity: 10% to 93% (non-condensing)
• Operating voltage: 21V modulated (supplied via SLC line)
• Current consumption:

o            Normal status: 5 mA

o            During short or open: 0 mA

Installation Configurations

Class A configuration: Closed loop arrangement that does not reduce loop capacity. Each loop can still handle 127 addresses excluding the isolator module addresses. ADR-3000 requires minimum 3 LI-3000 modules per loop, ADR-7000 requires minimum 1 LI-3000 module.

Class B configuration: Branching T-shaped SLC loop configuration with or without isolators. Without isolators, a short circuit stops communication with the entire loop. With isolators, each branch is protected from other branches.

Wiring and Connection

The module connects to the control panel via two-wire solid copper cable, 20-12 AWG cross section (.5-.3 mm²). Twisted-pair cable is recommended. Connect incoming SLC wires to SLC-L and outgoing wires to SLC-R terminals.

Certifications

• EN 54-17 Approved
• IS 1220 Approved
• UL 864 Compliant
• CE Marked

Compatible Systems and Products

Control Panels:

• ADR-7000, SAVER-7000, GUARD-7 analog addressable control panels
• ADR-3000 series control panels

Compatible Modules:

• TFB-180 Standard Detector Base (can be used with TFB-180CA raised base)
• All TELEFIRE analog addressable detectors and modules