The RS-485 Repeater/Splitter provides a means of creating electrically separate RS-485 bus segments. The unit provides bi-directional half-duplex communication between a master RS-485 port and up to five repeater ports.

The unit has three power supply inputs: from the Master (K2 & K3), from an external supply (K5 & K9), and from the Isolated RS-485 port (K8). The repeater ports 1-4 may be electrically isolated from the Master power circuit (switch SW1). The ISO Repeater port may be electrically isolated from Repeaters 1-4 and the Master channel. Alternatively, Repeaters 1-4 and/or ISO Repeater may be driven from the same power supply as the master power circuit.

The RS-485 Repeater/Splitter may be installed inside a Pertronic fire alarm control panel, or it may be installed in a stand-alone enclosure.

Features

• Master Channel: 1 x RS-485 port (IDC plus Phoenix style) connection to/from fire alarm control panel
• Repeater Channels 1-4: 4 x non-isolated repeater RS-485 ports
• ISO Repeater Channel: 1 x isolated repeater RS-485 port
• 1 x switch for Master or External power to Repeater RS-485 ports 1-4
• 1 x External power input (2 connectors)
• 1 x optional Master terminating resistor with jumper link
• Terminating resistors (120Ω) permanently enabled on Repeaters 1-4 and Iso Repeater
• Additional connector for daisy chaining Repeater/Splitter units
• 3 x LEDs: DC power; Master RS-485 RX; Master RS-485 TX
• The Pertronic Loop Responder Case accommodates two RS-485 Repeater/Splitters