Fire detector repeater RS485

transmissionisolatedRS-485

Product overview
The RS-485 Repeater/Splitter RS485REP provides electrically separate RS-485 bus segments to extend and distribute bi-directional half-duplex communication from a master RS-485 port to up to five repeater ports. The unit supports installation inside a fire alarm control panel or in a stand-alone enclosure.

Key features

• Master channel: 1 x RS-485 port (IDC + Phoenix-style)
• Repeater channels 1–4: 4 x non-isolated RS-485 repeater ports
• ISO Repeater channel: 1 x isolated RS-485 repeater port
• Power options: three inputs — Master (K2 & K3), External supply (K5 & K9), Isolated RS-485 port (K8)
• Switch (SW1) to isolate Repeaters 1–4 from Master power or select external power
• Termination: optional Master terminating resistor (jumper); 120 Ω terminating resistors permanently enabled on Repeaters 1–4 and ISO Repeater
• Daisy-chaining: additional connector for chaining multiple Repeater/Splitter units
• Indicators: 3 LEDs for DC power, Master RS-485 RX and TX
• Accommodates two RS-485 Repeater/Splitters in the Pertronic Loop Responder case

Technical specifications

• Product code: RS485REP
• Model name: RS485 Repeater
• Function: bi-directional half-duplex RS-485 repeater/splitter up to five repeater ports
• Master channel connector types: IDC and Phoenix-style
• Repeater ports: 4 non-isolated + 1 isolated (ISO)
• Power inputs: Master (K2 & K3), External (K5 & K9), Isolated port (K8)
• Isolation control: switch SW1 isolates Repeaters 1–4 from Master; ISO Repeater can be isolated from Repeaters 1–4 and Master
• Termination resistors: 120 Ω on Repeaters 1–4 and ISO Repeater; Master termination via optional jumper
• LEDs: DC power, Master RX, Master TX
• Mounting: internal to fire alarm control panel or stand-alone enclosure

Ordering & installation

• Product Code | Description: RS485REP | RS485 5 Way Repeater/Splitter Printboard Assy
• Installation: mount inside compatible Pertronic control panels or in a separate enclosure; allow for wiring to Master, external power and isolated port as required
• Use-case: extending RS-485 networks, isolating segments to prevent ground loops or faults, and daisy-chaining multiple units for larger installations