Wiring of COM Port2-42.2.2 Applicable CableThe following cables should be used. Suitable wires (strand wire): RS-485 communication wireClassifi-cationCross-sectionalviewConductor InsulatorCablediam.Sample appropriatecableSize Resist-ance(at 20°C)Mate-rialThick-nessShieldedtwistedpairCoatingShieldConductor Insulator1.25 mm 2(AWG16)or moreMax.16.8Ω/kmPoly-ethyleneMax.0.5 mmApprox.8.5 mmSumiden Hitachi CableKPEV-S1.25 mm 2 × 1PBelden Inc. 98600.5mm 2(AWG20)or moreMax.33.4Ω/kmPoly-ethyleneMax.0.5 mmApprox.7.8mmSumiden Hitachi CableKPEV-S0.5 mm 2 × 1PBelden Inc. 9207VCTFCoatingConductor Insulator0.75mm 2(AWG18)or moreMax.25.1Ω/kmPolyvinylchlorideMax.0.6mmApprox.6.6mmVCTF0.75 mm 2 × 2C(JIS)• Use shielded twisted pair cables.• Use only one type of transmission cable. Do not mix more than 1 type.• Twisted pair cables are recommended in noisy environments.• For RS-485 transmission line, use crossover wiring, and ground one end ofa shielded cable.• If two wires are connected to the plus and minus terminals of RS-485, usewires of the same material and the same cross-sectional area between 0.5and 0.75 mm 2.
