SN65176B: SN765176B transmission distance problem

zhao zhaoyong

Part Number: SN65176B

Hello

RS485 signal transmission distance is up to 1km in theory. I would like to know, what is the actual transmission distance of the customer using TI SN65176 and the RS485 communication is normal?

Regarding RS485 signal gamma-transport distance, it is related to the following points:

1. RS485Cable

2. Work environment

3. Adjust Bus I/O port, A/ B pull up resistance and matching impedance.

Are there any other reasons?

Best Regards

Leon

文晔集团

广东省深圳市南山区高新中三道9号环球数码大厦12楼

Mobile:(86)159 8985 2994

Tel:(86)755-26743880 Ext:6643

Fax:(86)755-26743990

over 6 years ago

0 Miguel Robertson over 6 years ago

TI__Guru 62920 points

Hi Leon,

The maximum achievable distance for a given data rate will depend on the transceiver design (transmitter output amplitude and receiver input sensitivity), the cable characteristics (DC resistance and AC loss profile), termination values/placement, overall network topology (daisy chained versus star/tree, etc.), and the jitter tolerance of the UART used for communication.

Section 9 of this app note gives a good summary of how these different factors can limit RS-485 data transmission length at different rates:

www.ti.com/.../slla272c.pdf

Please let us know if you have any further questions on this.

Regards,
Max

0 zhao zhaoyong over 6 years ago in reply to Miguel Robertson

Intellectual 840 points

Hi, Max
Thank you for your support
Best Regards
Leon
文晔集团
广东省深圳市南山区高新中三道9号环球数码大厦12楼
Mobile:(86)159 8985 2994
Tel:(86)755-26743880 Ext:6643
Fax:(86)755-26743990

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SN65176B: SN765176B transmission distance problem