RS-422 is Twisted Pair a must ?

[TXRX]

Hi,

I have a distance of 120 meter, Is with RS-422 i can use unshielded cable without twisted pair ?

Thanks,

Doron

 

[uavmax]

The RS-422 specification recommends twisted pair cable. I recommend erring on the safe side and using shielded cable. Shielded cable is only slightly more expensive than unshielded. It can be difficult to quantity whether shielding is required in a particular system or not, until problems arise.

 

[passpics]

No, twisted pair would be an absolute must over that sort of distance. And as the other poster said, shielding would be highly recommended to prevent sleepless nights . I have seen such runs over UTP Cat5e, but not recommended in my opinion.

Cheers,
Martin