RS-485 Active Hub
The I-7514U is a 4-ch RS-485 active star wiring hub, it has 4 independent RS-485 output channels and one RS-485 input channel. Each output channel is equipped with an individual driver. The data from a master to the input channel will simultaneously be forwarded to all the four output channels.
Baud Rate Setting
The I-7514U provides 2 modes of baud rate setting, one is Self-Tuner mode and the other is fixed baud rate mode. The Self-Tuner mode can support Multiple Baud Rate and Multiple Data Format. The Self-Tuner design is exactly the same as I-7513 and I-7510 series.
The Fixed baud rate mode offers a better quality for data transmission over long or lossy lines or electrically noisy environments.
The Short-circuit protection can automatically shut off the breakdown channel, this kind of design can suffice to protect the communication system. When a connected RS-485 equipment breaks down, the breakdown channel will be isolated to ensure that other equipments work normally.
In some critical environments, you may need to add termination resistors to prevent the reflection of serial signals.
The I-7514U includes a 120Ω termination resistor for each channel by jumper selectable (Default disable).
The I-7514U has 6 LED to indicate the power status and network traffic.
The TxD/RxD LED will flash when the unit is being sent out or received data.
True RS-485 Star Wiring Hub
Independent RS-485 driver for each channel
LEDs for indicating RS-485 TxD/RxD activity
Auto Switching baud rate, 300 ~ 115200 bps and fixed baud rate setting via rotary switch, 1200 ~ 115200 bps
Hubs can be daisy chained for 256 channels
120Ω termination resistor for each channel
Power Input, +10 ~ +30 VDC
Operating Temperatures, -25 °C ~ +75 °C
1 RS-485 Channel: Data+, Data-
4 RS-485 Channels: Data+, Data-
Belden 8941 (2P twisted-pair cable), if different cables are used, the transmission distance may change
Max. 1,200 m at 9.6 kbps; Max. 400 m at 115.2 kbps
Max. Devices Supported
256 (Each channel)
Self-Tuner Asic Inside
300 ~ 115200 bps via Auto Switching mode; 1200 ~ 115200 bps via Fixed Baud Rate mode
2,500 VDC isolation on CH1~CH4
Removable 10-Pin Terminal Block x 1; Removable 6-Pin Terminal Block x 1