DHI-HY-1431R-Front DHI-HY-1431R-Left 45° DHI-HY-1431R-Right 45° DHI-HY-1431R-size DHI-HY-1431R-certification

Looped Bus Isolator Module

The loop circuit connects the detectors, manual call points, sounderstrobes, modules, and fire alarm control panel in a loop through thebus. This design enables the FACP to receive information from otherdevices, facilitating two-way transmission of signals and providing anadditional transmission path for the system circuit. If an open circuitfault occurs, the entire circuit will not be affected. If a short circuitoccurs, the isolator modules on both sides of the short-circuited areaoperate, without disrupting the normal operation of the entire system.

DHI-HY-1431R Looped Bus Isolator Module is indispensable to loopcircuit. Characterized by two-wire technology, this module protectsthe bus communication circuit.

SKU:

DHI-HY-1431R

Certification:

CE, CPR, UKCA

Brand:

Description

Feature

  • Compact Solution: With the assistance of a loop bus switch module and wiring, this system can transition from a radial to a loop circuit without replacing control panel
  • Convenient wiring: Polarity-free with automatic identification
  • Simple configuration: Shares the same configuration logic as theradial circuit without any special requirements

Technical Information

Parameter Introduction
Electrical
Working Voltage DC16V~ DC28V
Current
  • Monitoring current: ≤ 50μA
  • Operating current: ≤ 45mA
Indicator Isolate: Yellow LED is constantly off when works normally and remains lit when short circuit occurs
Communication Wiring
Wiring Two-wire
Communication Distance ≤ 1500 m
Environment
Operating Temperature –10℃ to +55℃ (+14℉ to +131℉)
Storage Temperature –20℃ to +65℃ (–4℉ to +149℉)
Operating Humidity ≤ 95% RH (no condensation)
Construction
Color White
Dimensions (with base) 90 mm × 90 mm × 37 mm (3.54″ × 3.54″ × 1.46″)
Weight (with base) 136.1g (0.3lb)

 

FAQ 

Problem Solutions
Output terminal is short-circuited, the isolate indicator does not light up
  • Replace device.
  • Check the circuit length.
  • Contact the supplier for advice.

Device Installation

1. Packing List
Check the quantity and model. If you find device damage or any loss,contact the after-sales service.
2. Installation Steps
Prerequisites
2.1 Disconnect the power supply of the device before installation.
2.2 The insulation resistance between buses should be greater than 20KΩ, and the insulation resistance of the bus to ground should be greater than 20MΩ.
2.3 Use RVS twisted pairs with a section area of 1.5 m㎡ or 1.0 m㎡ for the signal buses.

Test and Maintenance

1. Test
The isolate indicator is constantly off when works normally and remains lit when short circuit occurs.
2. Maintenance
To keep your device in good working condition, please follow these requirements.
2.1 Simulate alarm test: Test the device once half a year (recommended).
2.2 Before testing or maintaining, inform the proper authorities that the system is undergoing maintenance and will temporarily be put out of service. Disable the system to prevent unwanted alarms.

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