Pc Serial Port To Rs485

RS485HUB: 4-Port RS485 Repeater/HUB with RS232 Port

Let me spin a very large

RS485 network for you.

Additional information coming soon.

General Description:

The RS485HUB is a 4-port automatic RS485 hub repeater non-isolated with an RS232 port. The unit can be used to expand RS485 serial communications

networks by increasing the maximum distance and/or number of nodes on a network. Larger networks can be implemented by cascading units. This repeater is a true port-to-port repeater any data received at one port is transmitted to the remaining ports. Each port

has its own LED indicators, termination jumper and an RXEN receive enable jumper. Bias is

fixed with 620 Ohms of pull-up and pull-down resistance to hold the data lines

in a known state when the data lines are inactive. The built in RS232 port allows easy connection to a PC. Each RS485 port on

the RS485HUB hub will support up to 32 full-load RS485 devices. Additional units/nodes

can be added, using 1/2 64 units and 1/4 128 units load devices. The SN65LBC184

transceiver IC, employed in the RS485HUB, is a 1/4 load device, has built-in transient

protection and is slew rate limited to 250 Kbps. The operating temperature range is -40C to 85C.

Need something special. Please contact us. We have additional isolated and non-isolated converters, repeaters, and repeater hubs. Units are generally stock to 2-3 business days for shipment. We design and manufacturer our entire product line, and offer technical support for our units, and can offer system recommendations for your application. Please give us a call: 513-874-4796

Related Files:

Physical Properties and Features:

Specifications:

Options and Ordering Information:

Need a different configuration or more information. Give Ron a Call at 513-874-4796 or 513-638-0228 Cell

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RS-485 is a serial communications standard that provides asynchronous communication capabilities, such as hardware flow control,

software flow control, and parity check. It has been widely used for decades.

Because RS-485 signals are transmitted over twisted-pair cabling, the connections are less sensitive for noise.

It can span relatively large distances up to 4000 feet.

The following document describes the functions of the pins on the RS-485 9 pin Sub-D connector used in serial communications.

The pins in the images are as viewed from the pin side not the solder or printed circuit board side.

The male sockets are used on the DTE Data Terminal Equipment or PC side.

The female sockets are on the DCE Data Communication Equipmnet or Modem Side.

Using the ActiveXperts Serial Port Component you can send and receive data and control the RS485 port.

9 Pin connector DB-9

1 GND Common Ground

2 CTS Clear To Send

3 RTS Ready To Send

4 RXD Received Data

5 RXD- Received Data -

6 CTS- Clear To Send -

7 RTS- Request To Send -

8 TXD Transmitted Data

9 TXD- Transmitted Data -.

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Additional information coming soon. General Description: The RS485HUB is a 4-port automatic RS485 hub repeater non-isolated with an RS232 port.

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