The TRT-200 A Ringbus Isolator is an EN 54-17 certified module designed for reliable monitoring of loudspeaker lines in electroacoustic emergency warning and voice alarm systems (ENS/SAA). As part of the VARES-LOOP system, it plays a key role in detecting and isolating line faults within the ring network.

Installed in series within the speaker loop, TRT-200 A transmits both audio signals and control data from the TRC-800 A Ringbus Controller to the connected loudspeakers. It continuously monitors the input, output, and speaker terminals for short circuits, open circuits, and ground faults. In the event of a fault, it immediately reports to the controller and isolates the defective segment. A built-in LED indicates on which side of the module the fault has occurred.

All connected speakers must include a DC blocking capacitor (TRK-001 A), except for single units connected directly at T-branches.

Technical Specifications (English):

Model:

• TRT-200 A

Power Supply (via TRC-800 A):

• 19 – 30 V DC (Nominal 30 V DC)
• Idle current: 100 µA
• Max. Power Consumption: 20 mW

Control Signal:

• 20 kHz / 7.5 Vrms

Control Response Times:

• Fade-in: 0.3 s
• Fade-out: 1.0 s

Wiring:

• 2-wire system, max. 2.5 mm²
• Max. loop length: 1,000 m
• Max. cable outer diameter: 13 mm

T-Branch (End-of-Line):

• Max. 50 W
• EoL resistor: 47 kOhm, 0.25 W or higher

Speaker Type:

• Only with DC blocking capacitor (TRK-001 A)

LOOP Fault Detection:

• Short circuit
• Wire-to-wire
• Open circuit
• Ground fault

Mounting:

• Surface mount at speaker location

Connections:

• 3-pole 5 mm WAGO terminal block:
• Loop input: L+, L−, GND (0.8–2.5 mm²)
• Loop output: L+, L−, GND (0.8–2.5 mm²)
• Speaker: L+, L−, GND (0.8–2.5 mm²)
• LED: L+, L− (0.8–2.5 mm²)

Housing / Protection Class:

• ABS with transparent cover
• IP21C

Dimensions (W x H x D):

• 110 x 130 x 55 mm

Weight:

• 150 g

Certification:

• EN 54-17:2005
• Certificate No.: 0560-CPR-142190002

Special Features:

• Rapid detection and isolation of line faults
• LED indicator for fault side identification
• Seamless integration into VARES-LOOP topology
• High reliability for ENS/SAA system environments