Can a regular instrument signal cable (non-twisted pair) be used as a substitute for a 60-meter 485 communication cable?
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This post was last edited by kylestone on 2022-2-14 at 10:51. Can the 60-meter 485 communication cable RVVPS 1*2*0.5mm2 be replaced with a regular instrument signal cable ZR-KVVP 1*2*1.5mm2 (non-twisted pair)?
Our office uses non-twisted pair for communication, and it works very well. The length is 60-70 meters.
It might work fine in practice, but once interference occurs it’s difficult to identify the issue, which will cause a lot of trouble later on
This post was last edited by sdlyml on 2022-2-14 at 12:47. No problem – they all come with shielding, which provides sufficient interference resistance. It’s simply a matter of whether it’s a flexible cable or a rigid one, and whether the wires are twisted together
Sure, 150 meters is fine for me as well
I used an instrument signal cable of less than 100 meters (also twisted pair, but with a looser twist) to replace the 485 communication cable; the communication speed was very slow. I checked the communication settings at both ends and found no issues, but I was unable to identify the cause. I’m not sure if this cable is the problem. To avoid such ambiguous issues, it is better to use communication cables in accordance with standard requirements; twisted pairs are tightly twisted, which gives them strong interference resistance.
I’ve used it; there’s no problem. In the cable trench, pay attention to arranging them in separate layers from the power cables.
No problem, I’ve used it; it’s just not that long.:)
This post was last edited by feng*aosa on 2022-2-21 at 15:27; it works fine. But it is not recommended. . The smaller the twist length of the twisted pair, the greater its resistance to interference, but at the same time the signal bandwidth decreases. In situations where twisted pair cables are generally required, the signals are adjusted to take advantage of the characteristics of those cables ； Using ordinary cables in place of twisted pairs may lead to interference or communication delays. Replacing twisted pair with a regular cable is usually feasible. But once it stops working, it can be quite troublesome. If the quantity is small, it’s also fine to wait and replace it once there’s a problem.