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| 8 Channel RS-485 Active Hub |
| Item# 30048 |
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Overview
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- Dual inputs, designed for RS232 or RS485 half duplex Input
- Eight individual RS-485 half duplex output
- 4000 foot line length per channel
- Can be daisy-chained for up to 64 channels
Essential Info
If you have devices requiring signal or power that are located up to 4,000 feet away from your CommStar Network Controller, there is an answer. Using a new unified host Interface, the 8 Channel RS-485 Hub allows for both an RS-230 and an RS-485 input connection and then distributes signal or power over long runs out to eight separate devices. The advantage of having this product is that the RS-485 signal travels farther, meaning you won't have to spend more money on repeaters couplers or amplifiers. Additionally, the RS-485 line can be daisy chained, instead of being home run wires, so you can cut down on wiring costs. Important Note: Only 1 RS-232 or RS-485 interface input port can be used at a time; selectable by adjusting the jumper.
Manuals/Software
What's Included
8 Channel RS-485 Active Hub
12VDC, 1A. Transformer
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More Info
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Other Features
Two-wire half-duplex operation
Two-wire power screw terminal strips
Two-wire data screw terminal strips
Two-way RS-232/485 converter
16-device configuration
Active Hub Channels
Each channel on the hub is driven by a separate RS485 driver. Each channel can support 128 devices and a maximum line length of 4000 ft. Active transmission control is provided by the hub for outbound messages from the Master input. All channels transmit simultaneously.
Star Wiring Topology
The hubs are designed to allow trouble free point to point star wiring topologies, without regard for line length or termination. However, each hub channel can support single device or multi-drop configurations with proper network considerations.
Network Power
Network devices may be powered from the hub's 12VDC @ 200mA max. Each channel is protected by a re-settable 200mA fuse. Do not exceed maximum power draw for all devices of 1000mA. Power input to the hub is protected by a re-settable fuse.
Channel Termination
Termination resistors (120 Ohm) are generally recommended on line lengths over 100 ft. Each channel has a termination resistor on board. For SINGLE device connection to a channel, a terminating resistor should be on the device end also. For MULTI-DROP connection to a channel, a terminating resistor should be installed on the last device on the line.
HomeSeer Connection
Converts RS485 signals to RS232 for use in connecting TR16, TR40, and ZCVX controllers to a HomeSeer system. Only one controller is needed. All thermostats and zone controllers are wired to this hub. The hub then connects to a single RS232 serial port on the HomeSeer computer.
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Specifications
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Specifications | | Manufacturer: | Residential Control Systems | | Manufacturer Product No.: | 8AH485D | | Inputs: | One RS-485 or one RS-232 | | Outputs: | Eight RS-485 | | Power Supply: | 12VDC, 1A | | Dimensions: | 6" x 4" x 1.5" | | Output Voltage Restrictions: | 200ma; 1000ma total for all channels | | Chanell Line Length: | Up to 4000 feet on each channel |
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